Patent ID: 8323716

Claim:
A product comprising a sweetener, wherein the sweetener comprises more than 98% of glucosylated sweet glycoside derivatives, wherein the sweetener is produced by a process of enzymatic transglucosylation from at least one sweet glycoside selected from the group consisting of stevioside, rebaudioside A, rebaudioside C, and dulcoside A; wherein the process of enzymatic transglucosylation comprises: dissolving starch into water to form a starch suspension; adding a first batch of CGTase into the starch suspension and incubating for 0.5 to 2 hours at 75-80° C., resulting in the liquefaction of starch; adding a purified Stevia extract comprising stevioside, rebaudioside A, rebaudioside C, and/or dulcoside A into the liquefied starch suspension, resulting in a reaction mixture; wherein the added Stevia extract is about equal to that of the starch; adding a second batch of CGTase into the reaction mixture and incubating for 12 to 48 hours at 55-75° C.; adding sucrose into the reaction mixture and incubating for 2 to10 hours at 65-75° C. to form fructose-terminated oligosaccharides; removing malto- or fructose-terminated oligosaccharides; and concentrating and drying to obtain the sweetener with more than 98% of the glucosylated sweet glycoside derivatives; wherein the sweetener is with the most superior sweetness quality and more than 170 times of relative sweetness to 5% of sucrose.