REDUCED CALORIE CHEESE PRODUCTS

Abstract: Reduced calorie cheese products are prepared by replacing some or all of the fat in a cheese recipe with a fat replacement composition comprised of a fatty acid-esterified propoxylated glycerin composition of one or two or more fatty acid-esterified propoxylated glycerin compositions. The fat replacement compositions are selected based on the melting profile of the cheese product so that the melting profile of the fat replacement composition is similar to the natural cheese counterpart of the cheese product.

Description: TITLE: REDUCED CALORIE CHEESE PRODUCTS Field of the Invention The present invention has to do with reduced calorie cheese products. More specifically, the invention relates to cheese products wherein some or all of the milk fat has been replaced by a fatty acid-esterified propoxylated glycerin composition. Description of the Related Art Imitation cheeses made with non-dairy or milk products, and vegetable fats such as coconut, palm, soy, sunflower, cottonseed or their combination are being produced although the nutritional value of such products has been criticized. These products function much like their natural counterparts, offer reasonably similar taste, and are quick to prepare, requiring not much more than blending of the ingredients. Other cheese products which are not natural cheeses are pasteurized process cheese food and process cheese. Pasteurized process cheese food is a dairy product containing more moisture and less fat than process cheese. Its pH is lower and the pas¬ teurizing temperatures must be higher in order to provide greater protection against bacterial spoilage. Alkali salts are used to emulsify the cheese mass, and organic acids, such as citric, lactic, and acetic acid are introduced to decrease the pH to about 5.2 as compared to natural cheeses which may have pH of 5.6 to 5.8. Gums and starches are often used for water re¬ tention. In the United States, Federal Standards of Identity state that process cheese foods must contain not less than 44% and not more than 60% moisture, and not less than 20% milk fat. Cream cheese, By Federal Standards of Identity, contains at least 33% fat, and not more than 55% moisture. It is formulated very much like homogenized ice cream mixes and can be either hot or cold packed. Cream and Neufchatel cheeses are soft, unrip- ened cheeses. They are smooth in texture, not like cottage cheese, as their curds are broken by mechanical agitators and not cut with knives. Cheddar cheese is a distinct type of cheese but there are many varieties or modified forms of it. Natural Cheddar cheese is obtained by piling and repiling blocks of warm curd in the cheese vat for about two hours during which time lactic acid increases to a point where coliform bacteria are killed by the free hydrogen ions and the curds are flattened to the point where they lose their identity. Most Cheddar cheese is ripened at about 4 ° C for four to twelve months. Under Federal Standards of Identity, Cheddar Cheese must contain not more than 39.0% moisture and not be less than 50% of the fat as dry matter. It must be "aged for 60 days or more" before it is sold to the consumer. Among hard Italian cheeses, Parmesan is the most popular in the United States. It is defined by the Federal Standards of Identity as containing not more than 32% moisture, with a total solids of not less than 32% fat, and minimum curing time must be not less than 10 months. Many attempts have been made to replace the fat in cheese and imitation cheese products with non-fat bulking agents com¬ monly used in the manufacture of foods. Starches, gums, pro¬ teins and non-digestible fatty substances are presently used for this urpose. "at replacement compositions which have been developed for use in low calorie fat-containing foods are known. An early development employing sugar fatty acid esters is described in U.S. Patent No. 3,600,186. The compositions are generally de- scribed as suitable for use in dairy products, but cheese is not mentioned specifically. U. S. Patent Nos. 5,061,503 and 5,061,504 describe syn¬ thetic cheese analogs having reduced calories and animal fat. The analogs employ low-calorie fatty materials which include polyol fatty acid polyesters, preferably sugar, sugar alcohol, and polyglycerol fatty acid polyesters which are solid or semi- solid at roor temperature and liquid at body temperature. An anti-anal lee.,. ge agent also is used to prevent leakage of non- digested liquid low-calorie fatty materials through the anal sphincter. A low fat processed cheese product which employs microreticulated microcrystalline cellulose to simulate the texture and mouthfeel of fat is disclosed in U. S. Patent No. 5,215,778. The microreticulated microcrystalline cellulose is described as porous and particulate and it is employed in an amount from about 0.25 to about 2 weight percent of the substan¬ tially fat-free processed cheese product. U. S. Patent No. 5,225,220 describes a process of manufac¬ turing cheese wherein carageenans are used to controllably react with milk casein, allowing processing of the cheese curd to obtain a low fat cheese having what is said to be a taste and texture quite similar to typical fat containing cheeses. All of the low calorie cheese-type compositions discussed above have drawbacks either in the processes of their manufac¬ ture or the flavor and mouthfeel characteristics of the products themselves. Reduced calorie food compositions containing fat-type or- ganoleptic ingredients are known wherein an esterified epoxide- extended polyol is employed as a full or partial replacement for vegetable oils and fats. Fat substitutes of this type are dis¬ closed in U. S. Patent No. 4,861,613 to White et al . (referred to herein as "White" and incorporated by reference herein in its entirety). However, it has not heretofore been known how to modify such substances so as to render them suitable for use as milk fat replacements in cheese products. Essential materials for acceptable cheese-type products are good quality skim milk, casein, food grade emulsifiers and vege- table fats. This invention utilizes all of these but replaces the vegetable fats with fatty acid-esteri ied propoxylated glyc¬ erin compositions whose melting characteristics approximate the behaviors of the natural cheese counterparts. The advantage is apparent in the ease of emulsification, no interference with natural flavor of the cheese and shortened curing time, when preferred, as the fatty acid-esterified propoxylated glycerin compositions impart their own physical characteristics to the finished products. Accordingly, it has now been found that certain fatty acid-esterified propoxylated glycerin compositions can be employed as a substitute for some or all of the milk fat in cheese products. The compositions have a bland flavor and the ability to form a stable product. They can be used to make fine tasting, premium quality, low-calorie cheese products hav- ing a texture similar to natural cheese. The cheese products of the invention also have a taste and appearance similar to natu¬ ral cheese. In the present specification and claims, all parts and percentages are by weight unless otherwise specified. SUMMARY OF THE INVENTION The fat replacement compositions of the invention are com¬ prised of one, or a mixture of two or more, fatty acid-esteri- fied propoxylated glycerin compositions that can be used to replace all or a portion of the butterfat in cheese products. The calorically reduced cheese products possess characteristics simulating the texture and flavor of conventional fat-containing cheeses. The fatty acid-esterified propoxylated glycerin composi- tions (sometimes referred to herein as "EPG" in the singular form and as "EPGs" in the plural form) are made by incorporating propylene oxide (sometimes referred to herein as "oxypropylene" or "PO") groups into a typical triglyceride fat as described in White. The average number of PO groups which are incorporated into a fatty acid is called the propoxylation number. The melt¬ ing point, melting profile and other characteristics of the composition can be modified by adjusting the propoxylation num¬ ber, the fatty acid chain length and level of unsaturation. Similarly, two or more different EPGs (i.e., having different propoxylation numbers) of the same fatty acid, two or more EPGs of different fatty acids having the same or different propoxylation numbers, and any combination thereof which pro¬ vides the desired fat replacement characteristics may be uti¬ lized. The most suitable EPG or combination of EPGs will vary depending upon the type of cheese being made because the tex¬ tures of different cheeses can vary considerably as to hardness, softness and other characteristics such as flavor and mouthfeel. The selection of the most suitable EPG or combination of EPGs according to the invention is based on the hardness of the cheese, with EPGs which are harder at room temperature being used in cheeses which are harder at room temperature. Soft cheese, such as cream cheese, semi-hard cheese, such as Cheddar, and hard cheese, such as par esan, accordingly, all can be for¬ mulated with the appropriate selection of the fat replacement compositions of the invention. In the present invention, the preferred embodiments of the reduced calorie cheese products employ as fat replacement ingre¬ dients in a recipe for making cheese, one or more EPGs selected from the group consisting of a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin having a propoxylation number of about 5 (referred to herein as "FHEPG-05 soyate"), a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin having a propoxylation number of about 14 (referred to herein as "FHEPG-14 soyate") and an EPG which is prepared by the propoxylation of glycerol to a propoxylation number of about 5 followed by esterification with a blend of about nine parts fully hydrogenated rapeseed oil fatty acids and about one part liquid soybean oil fatty acids and hydrogenation to a final IV of < about 10, referred to herein as EPG-05 9HR/1LS( IV≤IO) , preferably to a final IV of from about 2-6, referred to herein as EPG-05 9HR/lLS(IV=2-6) . BRIEF DESCRIPTION OF THE DRAWING Figure 1 illustrates the melting profiles for butter fat, FHEPG-05 soyate, FHEPG-14 soyate and a 60/40 blend of FHEPG-05 soyate and FHEPG-14 soyate. Fig. 2 illustrates the melting profile for EPG-05 9HR/1LS(IV=3.9) . Each melting profile is a plot of the solid fat indices, as measured by dilatometry following AOCS Method Cd 10-57 (avail¬ able from American Oil Chemists' Society, 1608 Broadmoor Dr., Champaign, IL 61821-5930 USA) for each composition over the temperature range from 32°F (0°C) to 104 ° F (40 ° C). DETAILED DESCRIPTION OF THE INVENTION The reduced calorie cheese products of this invention are prepared by selecting a fatty acid-esterified propoxylated glyc¬ erin composition having a melting profile similar to the melting profile of the desired cheese. Accordingly, it has now been unexpectedly found that the melting profile of the fat replace¬ ment composition is not necessarily similar to the melting pro¬ file of the fat which is being replaced. The fat replacement compositions of the invention are com¬ prised of one EPG, a mixture of two or more different EPGs (i.e., having different propoxylation numbers) of the same fatty acid, a mixture of two or more EPGs of different fatty acids having the same or different propoxylation numbers, and any combination thereof, as long as the desired melting profile characteristics are obtained. The fatty acid-esterified propoxylated glycerin composi¬ tions of this invention can function effectively as reduced calorie fat replacement compositions in a variety of cheeses ranging from soft spreadable cheeses to hard cheeses, especially where the butterfat component normally contributes substantially to the caloric content of the cheese. For example in cream cheese the butterfat component contributes about 90% of the calories, Cheddar cheese about 75% and parmesan cheese about 46%. The fatty acid-esterified propoxylated glycerin composi¬ tions of this invention contain glyceryl residues, oxypropylene units, and O II fatty acid acyl -CR groups. Typically, the compositions are mixtures of individual fatty acid-esterified propoxylated glyc¬ erin compounds which may differ from each other in degree of propoxylation and acyl group composition. The glyceryl residue may have the generic structure I I I o o o CH 2 -CH-CH 2 and is derived from glycerin OH OH OH CH 2 -CH-CH 2 or a glycerin equivalent. The oxypropylene units are generally interspersed between glyceryl residues and the acyl CH 3 CH 3 groups and have the structure -CH 2 -CH-0- or -CH-CH 2 -θ-. Typi¬ cally, more than one oxypropylene unit may be present between an oxygen of an individual glyceryl residue and an acyl group such that a polyoxypropylene unit is created. However, a single "branch" or "arm" of the fatty acid-esterified propoxylated glycerin may contain only one oxypropylene unit. Certain of the acyl groups may be attached directly to the glyceryl residue, without any intervening oxypropylene units, although an average of at least about 3 oxypropylene units per glyceryl residue must be present in the overall composition. The average number of oxypropylene units in the fatty acid-esterified propoxylated glycerin composition is from about 3 to about 16. The presence of oxypropylene units is critical, as the oxypropylene units help to lower the melting point of the compositions thereby improving the mouthfeel and melting characteristics as compared to analogous compositions not containing oxypropylene units. In order to maximize the resistance of the fatty acid-es- terified propoxylated glycerin composition towards pancreatic lipase enzyme-catalyzed hydrolysis, the oxypropylene units adja¬ cent to the acyl groups should be oriented such that secondary rather than primary ester linkages are created. That is, the methyl group should be located on the carbon atom attached to the oxygen atom forming part of the ester linkage CH 3 0 I II as follows: -CH 2 -CHOCR. Preferably, at least about 80% of the ester linkages in the overall composition are secondary. Most preferably, at least about 95% of the ester linkages are second- ary. However, the secondary ester content can be less than about 80% without adversely affecting the melting properties of the EPGs of the invention. It is desirable for the fatty acid-esterified propoxylated glycerin composition to be substantially esterified such that it has an average of at least about 2.5 (more preferably, at least about 2.9) fatty acid acyl groups per equivalent of glycerin. The extent of esterification may be readily determined by con¬ ventional analytical methods such as hydroxyl number. The structure of the composition preferably is such that the composition has a porcine pancreatic lipase hydrolysis rate of less than about 10% as compared to an olive oil standard. Preferably, the relative hydrolysis rate is less than about 1% of the olive oil rate. Methods of measuring porcine pancreatic lipase hydrolysis rate are described in White. The average number of oxypropylene units in the EPG must not be so low as to result in a high proportion of the acyl groups being attached directly to glyceryl residues since such directly attached acyl groups will be nearly as susceptible to enzymatic cleavage as the acyl groups in a conventional fully digestible triglyceride, thus reducing the usefulness of the composition as a low calorie fat substitute. At the same time the average number of oxypropylene units should not exceed about 14 since the resulting compounds may be substantially lower in melting point or higher in melt viscosity and thus would not be suitable for use as fat replacements for use in cheese. The melting characteristics for a given EPG may be adjusted as needed by varying the average number of oxypropylene units per glycerin (propoxylation number) present in the composition. At a constant fatty acid acyl group content (i.e., if the rela¬ tive proportions of the different acyl groups present are fixed), the solid fat index at a particular temperature will increase as the propoxylation number is decreased and will de¬ crease as the propoxylation number is increased. As the average number of fatty acid acyl group carbons per equivalent of glyc¬ erin decreases or as the iodine number of the composition in¬ creases (as a result of increasing the proportion of unsaturated fatty acid acyl groups present), the average number of oxypropylene units per glycerin will need to be decreased to maintain the solid fat index at a given temperature above a predetermined target value. If a particular fatty acid-esteri- fied propoxylated glycerin composition has an undesirably high solid fat index at a given temperature the index may be brought below a predetermined target value by increasing the propoxylation number. By so adjusting the average number of oxypropylene units per equivalent of glycerin, the melting char¬ acteristics of each EPG may be controlled, and one EPG or a mixture of two or more EPGs may be employed to obtain a fat replacement composition having characteristics which are the most suitable for the type of cheese being made. Suitable EPGs may be prepared using either fatty acids or fatty acid derivatives such as fatty acid esters, fatty acid halides, or fatty acid anhydrides. Generally speaking, C 12 -C 2i saturated linear fatty acids and their derivatives can be used as starting materials for preparing the EPGs of the present invention. In addition, the iodine number (which reflects the propor- tion of unsaturated fatty acid acyl groups in the composition) must be less than about 30, more preferably is less than about 20, and most preferably is less than about 10 centigrams I 2 per gram of the composition. A relatively minor proportion of un¬ saturated fatty acid acyl groups may be advantageous, however, in order to ensure that the composition does not melt over an excessively narrow range. Iodine number (also referred to as iodine value, abbreviated as "IV") may be measured by AOCS method Cd 1-25. The C l2 -C 2t saturated fatty acid is linear (i.e., nonbranched) and preferably contains only one carboxylic acid functionality. The acyl group may thus correspond to the gen¬ eral structure 0 II -C(CH 2 ) r ,CH 3 wherein n is an integer of from 10 to 22. The value of n is most conveniently an even number (e.g., 10, 12, 14, 16, 18, 20, or 22) since the corresponding fatty acids are readily available at low cost from natural sources such as edible tri¬ glycerides. Specific illustrative fatty acids suitable for use as this component of the fatty acid-esterified propoxylated glycerin compositions include, but are not limited to, lauric acid, yristic acid, stearic acid, palmitic acid, eicosanoic (arachidic) acid, heneicosanoic acid, docosanic (behenic) acid, tricosanoic acid, and tetracosanoic (lignoceric) acid. Mixtures of these l2 -C 2i saturated linear fatty acids may also be utilized to advantage, as discussed above. While all of the acyl groups in the fatty acid-esterified propoxylated glycerin composition may be derived from C l2 -C 24 saturated linear fatty acid, the compositions may contain minor amounts of acyl groups derived from other C e -C 2 fatty acids. Preferably, the proportion of such other acyl groups is less than about 40%. Generally speaking, the incorporation of acyl groups which are relatively short in length (C β -C Lβ ) , unsatu rated, and/or branched will tend to decrease the melting point of the resulting EPG. The fatty acids which optionally may be used in combination with the required C 12 -C 24 saturated linear fatty acids may be any of the known fatty acids such as caprylic acid, pelargonic acid, capric acid, oleic acid, cetoleic acid, palmitoleic acid, gad- oleic acid, erucic acid, rincinoleic acid, linoleic acid, lino¬ lenic acid, myristoleic acid, eleostearic acid, arachidonic acid, or mixtures of these acids. Preferably, linear monocarboxylic acids containing from 0 to 5 double bonds are employed. The proportions and chemical structures of the fatty acid acyl groups in the fat replacement compositions of this inven¬ tion should be selected such that the mouthfeel characteristics are similar to those for the type of cheese which is being pre¬ pared. Increasing the ratio of average number of fatty acid acyl group carbons per equivalent of glycerin will shift the melting range of an EPG to a higher average temperature while decreasing the ratio will shift the melting range to a lower average temperature. The average number of fatty acid acyl group carbons per equivalent of glycerin in the fatty acid-esterified propoxylated glycerin compositions of the invention may be readily calculated from a knowledge of the fatty acid acyl group content (i.e., the chemical structures and relative proportions of the fatty acids used to prepare the compositions). The following formula may be used to calculate this average number (N a ) for a fatty acid-es- terified propoxylated glycerin composition prepared using fatty acids A and B: . IM, moles A x no. carbons in A , mo es B x no. carbons in B moles propoxylated glycerin moles propoxylated glycerin For example, a composition prepared by reacting a mixture of 1.5 moles of stearic acid (a C 18 fatty acid) and 1.5 moles of eicosanoic acid (a C 20 fatty acid) with 1 mole of propoxylated glycerin containing an average of 7 oxypropylene units per glyc- erin will have an average of 57 fatty acid acyl carbons per equivalent of glycerin. To minimize the available caloric content of the fatty acid-esterified propoxylated glycerin fat replacement composi- tions of this invention, the chemical composition should be selected such that the average molecular weight is at least about 800. More preferably, the minimum molecular weight is about 1000. In order for the fatty acid-esterified propoxylated glycerin composition to function as a suitable replacement for the natural fat in cheese it is also desirable that the average molecular weight not exceed about 2200. Preferably, the molecu¬ lar weight is below about 2000. As explained above, the preferred EPGs of the invention are different for different kinds of cheese. A preferred embodiment of the invention for cream cheese and cheddar cheese, for example, employs as a fat replacement composition a mixture of a stearic acid-esterified propoxylated glycerin composition having an average number of oxypropylene units per equivalent of glycerin (propoxylation number) of about 5, and a stearic acid-esterified propoxylated glycerin composi¬ tion having a propoxylation number of about 14, an iodine number less than about 10, an average number of fatty acid acyl group carbons per equivalent of glycerin of from about 51 to about 57, and a melting profile similar to butter fat. For this embodi- ment, fatty acids which are predominantly stearic, having at least about 75% and preferably at least about 80% by weight of saturated C 18 fatty acid, are most preferred. For example, hy¬ drogenated soybean fatty acid is predominantly stearic, gener¬ ally from about 83% to about 93% by weight, and it has been found to be particularly suitable for preparing the butter fat substitutes of the invention. Other fatty acid sources having more than about 75% stearic acid after hydrogenation include corn oil, cottonseed oil, olive oil, peanut oil, canola (low erucic rapeseed) oil, safflower oil, sesame oil, sunflower oil and mixtures thereof. A particularly preferred embodiment of the invention for cream cheese and cheddar cheese employs as a fat replacement composition a mixture of a fatty acid-esterified propoxylated glycerin composition having an average number of oxypropylene units per equivalent of glycerin (propoxylation number) of about 5 wherein at least about 80% by weight of the fatty acid is stearic acid, and a fatty acid-esterified propoxylated glycerin composition having a propoxylation number of about 14 wherein at least about 80% by weight of the fatty acid is stearic acid, an iodine number less than about 10, an average number of fatty acid acyl group carbons per equivalent of glycerin of from about 48 to about 56, and a melting profile similar to butter fat. The preferred EPG of the invention for parmesan cheese is made by preparing a mixture of about 90% by weight hydrogenated rapeseed fatty acid and about 10% by weight soya fatty acid and esterifying the mixture with propoxylated glycerol to synthesize a crude EPG. The product is a propoxylated glycerin composition having a propoxylation number of about 5, an iodine number less than about 10 preferably less than about 6, an average number of fatty acid acyl group carbons per equivalent of glycerin of from about 54 to about 60, and a melting point of from about 95 to about 110°F. For this embodiment, behenic (i.e. saturated C 22 ) acid-containing fatty acid compositions are employed. Fatty acid compositions which are relatively high in behenic acid content, having at least about 30% and preferably at least about 35% by weight of C 22 saturated fatty acid, are most preferred. Sources of behenic acid and stearic acid are well-known. For example, the fatty acids derived from rapeseed oil contain a relatively high proportion (typically about 30 to about 50 weight %) of C 22 fatty acids. The erucic acid present may be readily converted by hydrogenation to behenic acid, either be¬ fore or after incorporation into the fatty acid-esterified propoxylated glycerin composition. A number of vegetable oils are known which contain high proportions (typically about 70 to about 95 weight %) of C 1S fatty acids. The unsaturated C lβ fatty acids present may be hydrogenated before or after incorpo¬ ration into the fatty acid-esterified propoxylated glycerin composition. Illustrative vegetable oils of this type include, but are not limited to, soybean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil, and the like. Fatty acids derived from mixtures of such oils may also be utilized to advantage. One specific type of EPG suitable for use in accordance with the present invention is a fatty acid-esterified propoxylated glycerin composition having an average number of oxypropylene units of from about 4 to about 6 and an iodine value (also referred to herein as "IV") of from about 2 to about 6, wherein the fatty acids are comprised of about 35 to about 45% by weight behenic acid and about 35 to about 45% by weight stearic acid (the balance of the fatty acids being any of the other known fatty acids). In another desirable embodiment, the fatty acid-esterified propoxylated glycerin composition has an iodine value less than or equal to about 10 (i.e., 0-10) and is obtainable by esterify- ing a propoxylated glycerin having an average number of oxypropylene units of from about 4 to about 6 with a fatty acid mixture wherein from about 80 to about 95 weight % of the fatty acid mixture are derived from rapeseed oil and the balance of said fatty acids are derived from a vegetable oil selected from the group consisting of soybean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil, and mixtures thereof. A particularly preferred EPG of the invention is made by preparing a mixture of about 90% by weight hydrogenated rapeseed fatty acid and about 10% by weight soya fatty acid and esterify- ing the mixture with propoxylated glycerol to synthesize a crude EPG. The product is a fatty acid-esterified propoxylated glyc¬ erin composition having an average number of oxypropylene units per equivalent of glycerin (propoxylation number) of about 5, an iodine number less than about 5, an average number of fatty acid acyl group carbons per equivalent of glycerin of from about 54 to about 60, and a drop melting point (also called a dropping point as measured by the Mettler Dropping Point method, AOCS Official Method Cc 18-80(93)) of from about 102 to about 110°F. The fatty acid-esterified propoxylated glycerin fat re- placement compositions of this invention may be prepared using any suitable method. In general, the procedures described in the prior art for synthesizing other fatty acid-esterified propoxylated glycerin compositions will be appropriate for use provided that the necessary C 12 -C 2i saturated linear fatty acids or fatty acid derivatives are employed in the esterification step. Such procedures are described, for example, in U.S. Pat¬ ents Nos. 4,861,613 (the White patent, referenced above) and 4,983,329 and in European Patent Publication No. 353,928, the disclosures of which are incorporated by reference herein in their entireties. As is explained in more detail in the above¬ mentioned publications, either fatty acids or fatty acid equiva¬ lents such as fatty acid esters, fatty acid halides, or fatty acid anhydrides may actually be employed in the esterification. The C 12 -C 2Λ saturated linear fatty acid acyl groups may also be introduced by using C 12 -C 24 unsaturated fatty acids in the esteri¬ fication step and then hydrogenating the esterified propoxylated glycerin composition to increase the proportion of C 12 -C 24 satu- rated linear fatty acid acyl groups to the desired level. Any residual free fatty acid remaining in the composition after esterification should preferably be removed or reduced as much as possible to minimize problems with off flavor, off-odor, or storage stability. The fatty acid-esterified propoxylated glycerin composi¬ tions of the present invention are particularly suitable for use as full or partial replacements for the natural fat in cheeses such as cream cheese, cheddar cheese, parmesan cheese, and other processed cheeses such as those described in U. S. Patent No. 5,211,978. Typically, cheese is highly caloric, having from about 70 to about 120 calories per ounce, and having from about 32 to about 55 weight percent of a fat component. The fat com¬ ponent in cheese generally is responsible for from about 46 to about 90% of the caloric content. To achieve a significant reduction in available caloric content, it will generally be desirable for at least about 50 weight percent of the fat compo¬ nent to be a fatty-acid esterified propoxylated glycerin compo¬ sition of this invention. The balance of the fat component may be milk fat or a different fat substitute, equivalent or mi- metic. The amount of the fat replacement composition of the invention may, if desired, constitute up to 100% of the total fat in the cheese product. In addition to the fat replacement component comprised of the fatty acid-esterified propoxylated glycerin composition, the cheese product of the invention may further comprise one or more conventional additives such as emulsifiers, binding agents, thickeners, curds, milk protein, aroma materials, vegetable proteins (especially soya proteins), flavoring salts and herbs, meat products, fruits, nuts, fungi and the like. EXAMPLES Example 1 Two EPGs were synthesized from soybean fatty acid and propoxylated glycerin (prepared by reacting 5 or 14 equivalents of propylene oxide per equivalent of glycerin under base-cata¬ lyzed conditions) and physically refined. The resulting materi¬ als were hydrogenated to saturation (IV<4), bleached and deodor¬ ized. The deodorized products were fortified with a mixed tocopherol blend of 50% Covi-ox T70 and 50% Covitol F1300 (both available from Henkel Corp., La Grange, Illinois, U.S.A.) to a level of 0.16%. The finished products were characterized using analytical methods commonly used by the industry to evaluate oils and fats. These methods included Wijs iodine value (AOCS Cd 1-25), dropping point (AOCS Cc 18-80(93)) and solid fat index (AOCS Cd 10-57) . The iodine value for the FHEPG-05 soyate employed in the following examples was 2.2 and for FHEPG-14 soyate it was 1.7. The dropping point for the FHEPG-05 was measured at 79.9 and for FHEPG-14 was measured at 63.7. The solid fat index data points for the components repre¬ sented in Figure I are set forth in Table I as follows: TABLE I SOLID FAT INDICES OF EPG BLENDS AND BUTTER FAT Temperature F 32 50 75 92 104 FHEPG-05 97.30 91.50 75.50 0.20 0.00 FHEPG-1 77.50 18.60 0.20 0.04 0.00 BUTTER FAT 87.20 69.90 26.50 4.50 0.00 EPG BLEND 85.00 60.10 15.20 0.00 0.00 Example 2 CREAM CHEESE PRODUCT MADE WITH FHEPG-05 AND FHEPG-14 Ingredients 1 FHEPG-14 20.00 FHEPG-05 13.00 Nonfat Dry Milk 14.00 Enzyme Modified Dry Milk 1.00 Rennet Casein 2.00 Merecol GI Gum 0.10 Salt 0.30 Disodium Phosphate 0.25 Sodium Citrate 0.25 Titanium Dioxide 0.05 Natural Cream Cheese Flavor 2.00 Natural Cream Extract 0.25 Lactic Acid 88% 1.00 Water 45.80 Total: 100.00 Procedure: 1. Place all ingredients, except the fat, lactic acid and cream cheese flavor, in a double boiler top. Blend well with a wire whisk. Allow to hydrate for 30 minutes. 2. Heat over boiling water while stirring vigorously until the mix reaches 160°F. Hold at this temperature for 30 min¬ utes. 3. Melt the fats and add to the hot mixture. 4. Add lactic acid and homogenize for 3 minutes at high speed. 5. Pour into plastic cups and refrigerate, covered until set. 6. The cheese product had the texture, organoleptic and other sensory characteristics of natural cream cheese. Example 3 CHEDDAR CHEESE PRODUCT MADE WITH FHEPG-05 AND FHEPG-14 Ingredients % FHEPG-14 18.50 FHEPG-05 12.40 Nonfat Dry Milk 17.50 Rennet Casein 6.00 Enzyme Modified Dry Milk 2.60 Salt 0.60 Oleoresin Paprika 0.05 Lecithin 0.02 Merecol Gl Gum 0.10 Calcium Chloride 0.01 Sodium Citrate 2.00 Disodium Phosphate 0.60 Water 35.12 Natural Cheddar Cheese Flavor 2.00 Lactic Acid 88% 2.00 Total: 100.00 Procedure: 1. Hydrate the casein with about 50% of the water at 72 ° F. 2. Dissolve the salts and the gum in the remaining 50% of the water; heat to about 160°F in a hot water bath. 3. Place fats, lecithin and oleoresin paprika in a tall stain¬ less steel container in a hot water bath. Stir to dis¬ solve. Heat to about 160°F. 4. Combine all dissolved ingredients in the tall stainless steel beaker and homogenize at high speed for 3 minutes. 5. Transfer the homogenized mass to a Hobart bowl heated with a heating mantle and fitted with a blade for mixing. 6. Add the remaining ingredients and mix on high speed for 5 minutes maintaining the temperature of the cheese mass at about 130 ° F. 7. Press the cheese into a brick-shaped plastic container and cool in the refrigerator until set. 8. Un old, wrap in a paper-lined foil and store in the refrig¬ erator. 9. The cheese product had the texture, organoleptic and other sensory characteristics of natural cheddar cheese. Example 4 Hydrogenated rapeseed fatty acid (1423kg) was blended with soybean fatty acid (140kg) to make a free fatty acid blend. The blend was reacted with propoxylated glycerin having a propoxylation number of 5 using the procedures described in U. S. Patent No. 4,983,329. The esterified product was physically refined, hydrogenated to near saturation (IV < about 6), bleached and deodorized. The hydrogenated product was fortified by blending with 0.15% tocopherol blend (50% Covi-ox T70 and 50% Covitol F1300) for 30 minutes at 60 ° C in a nitrogen atmosphere. The product was transferred to a belt dryer, grated and pack¬ aged. The finished product was characterized using analytical methods commonly used by the industry to evaluate oils and fats. These methods included Wijs iodine value, dropping point and solid fat index. Example 5 The grated product of Example 4 was analyzed and found to have an iodine value of 3.9 and a dropping point of 109.9. The solid fat index ("SFI") was as follows: TEMP ° F SFI 50 74.3 70 67.4 80 62.4 92 45.9 104 2.6 Example 6 PARMESAN CHEESE PRODUCT made with EPG-05 9HR/1LS(IV=3.5) Ingredients %. EPG-05 9HR/1LS(IV=3.5) 28.00 Nonfat Dry Milk 32.00 Enzyme Modified Dry Milk 5.00 Salt 2.30 Merecol Gl Gum 0.10 Water 30.50 Parmesan Cheese Flavor 2.00 Potassium Sorbate 0.10 Total: 100.00 Procedure: 1. Dissolve milk powders, gum and salt in warm, 90 ° F, water in a stainless steel container. 2. Place the container in a hot water bath. While stirring, heat the entire mass to 185°F and hold for 30 minutes. 3. Homogenize on high speed for 3 minutes while still hot. 4. Cool to 72 ° F. 5. Add the freeze-dried lactic acid producing starting culture granules as specified by the supplier. 6. Press into a ball and allow to ripen at 72 ° F in a clean, dry area for about 45-60 days. 7. Grate and use in the same manner as natural parmesan cheese. The cheese product had the texture, organoleptic and other sensory characteristics of natural parmesan cheese.

Claims: What is claimed is: 1. A reduced calorie cheese composition wherein from about 50% to about 100% by weight of the fat component is re- placed by a fatty acid-esterified propoxylated glycerin composi- tion. 2. The cheese composition of claim 1 comprising a soft or semi-hard cheese wherein said fatty acid-esterified propoxylated glycerin composition comprises at least two different fatty acid-esterified propoxylated glycerin compositions. 3. The cheese composition of claim 2 wherein at least about 75% by weight of the fatty acid in each fatty acid-esteri- fied propoxylated glycerin composition is stearic acid. 4. The cheese composition of claim 2 wherein the fatty acids in the fatty acid-esterified propoxylated glycerin compo- sitions are derived from an oil selected from the group consist- ing of soybean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil and mixtures thereof. 5. The cheese composition of claim 4 wherein the differ- ent soybean fatty acid-esterified propoxylated glycerin composi- tions are 1) a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin composition having a propoxylation number of 5 and 2) a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin composition having a propoxylation number of 14. 6. The cheese composition of claim 5 wherein the weight to weight ratio of the first fatty acid-esterified propoxylated glycerin composition to the second fatty acid-esterified propoxylated glycerin composition to the second composition is from about 60:40 to about 30:70. 7. The cheese composition of claim 6 wherein the fatty acid-esterified propoxylated glycerin composition has a melting profile of more than about 60 at 50 ° F, between about 15 and 35 at 70°F and less than about 5 at 92 ° F. 8. The cheese composition of claim 1 comprising a hard cheese wherein the fatty acid-esteri ied propoxylated glycerin composition has a solid fat index as measured by dilatometry of more than about 25 at 92 ° F and less than about 10 at 104 ° F. 9. The cheese composition of claim 8 wherein the fatty acid-esterified propoxylated glycerin composition has a solid fat index as measured by dilatometry of less than about 70 at 92 ° F. 10. The cheese composition of claim 9 wherein at least about 30% by weight of the fatty acid in the fatty acid-esteri- fied propoxylated glycerin composition is behenic acid. ll. The cheese composition of claim 9 wherein the fatty acid-esterified propoxylated glycerin composition has an average number of oxypropylene units per equivalent of glycerin of from about 4 to 6 and an iodine value of from about 2 to 6, wherein the fatty acids are comprised of about 35 to 45% by weight be- henic acid and about 35 to 45% by weight stearic acid. 12. The cheese composition of claim 9 wherein the fatty acid-esterified propoxylated glycerin composition has an iodine value of about 0 to 10 and is obtainable by esterifying a propoxylated glycerin having an average number of oxypropylene units per equivalent of glycerin of from about 4 to 6 with a fatty acid mixture wherein from about 80 to 95 weight % of the fatty acids in said mixture are derived from rapeseed oil and the balance of said fatty acids are derived from a vegetable oil selected from the group consisting of soybean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil, and mixtures thereof. 13. A method of making a reduced calorie cheese composi- tion having a fat component comprising replacing from about 50% to about 100% of the fat component with a composition comprised of a fatty acid-esterified propoxylated glycerin composition having a melting profile similar to the melting profile for the cheese. 14. The method of claim 13 wherein the cheese is a soft or semi-hard cheese and the fatty acid-esterified propoxylated glycerin composition comprises at least two different fatty acid-esterified propoxylated glycerin compositions. 15. The method of claim 14 wherein at least about 75% by weight of the fatty acid in each fatty acid-esterified propoxylated glycerin composition is stearic acid. 16. The method of claim 14 wherein the fatty acids in the fatty acid-esterified propoxylated glycerin compositions are derived from an oil selected from the group consisting of soy- bean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil and mix- tures thereof. 17. The method of claim 15 wherein the different soybean fatty acid-esterified propoxylated glycerin compositions are 1) a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin composition having a propoxylation number of 5 and 2) a fully hydrogenated soybean fatty acid-esterified propoxylated glycerin composition having a propoxylation number of 14. 18. The method of claim 17 wherein the weight to weight ratio of the first fatty acid-esterified propoxylated glycerin composition to the second fatty acid-esterified propoxylated glycerin composition is from about 60:40 to about 30:70. 19. The method of claim 13 wherein the cheese is a hard cheese and the fatty acid-esterified propoxylated glycerin com- position has a solid fat index as measured by dilatometry of more than about 25 at 92 ° F and less than about 10 at 104 ° F. 20. The method of claim 19 wherein the fatty acid-esteri- fied propoxylated glycerin composition has a solid fat index as measured by dilatometry of less than about 70 at 92°F. 21. The method of claim 19 wherein at least about 30% by weight of the fatty acid in the fatty acid-esterified propoxylated glycerin composition is behenic acid. 22. The method of claim 20 wherein the fatty acid-esteri- fied propoxylated glycerin composition has an average number of oxypropylene units per equivalent of glycerin of from about 4 to 6 and an iodine value of from about 2 to 6, wherein the fatty acids are comprised of about 35 to 45% by weight behenic acid and about 35 to 45% by weight stearic acid. 23. The method of claim 19 wherein the fatty acid-esteri- fied propoxylated glycerin composition has an iodine value of about 0 to 10 and is obtainable by esterifying a propoxylated glycerin having an average number of oxypropylene units per equivalent of glycerin of from about 4 to 6 with a fatty acid mixture wherein from about 80 to 95 weight % of the fatty acids in said mixture are derived from rapeseed oil and the balance of said fatty acids are derived from a vegetable oil selected from the group consisting of soybean oil, corn oil, cottonseed oil, olive oil, peanut oil, canola oil, safflower oil, sesame oil, sunflower oil, and mixtures thereof.

Inventors: SEKULA BERNARD CHARLES, TANCIBOK KRYSTYNA URZSULA, SEKULA, BERNARD, CHARLES, TANCIBOK, KRYSTYNA, URZSULA
Applicants: ARCO CHEM TECH, CPC INTERNATIONAL INC, CPC UNITED KINGDOM LIMITED, ARCO CHEMICAL TECHNOLOGY L.P., CPC (UNITED KINGDOM) LIMITED, CPC INTERNATIONAL INC.
Application year: 1996
Main classification: A23C20
IPC codes: A23C19, A23C20, A23L1