Question: Potassium bitartrate, sugar, water, colourings and flavorings can be combined to make which Scottish confection?

Context paragraphs:
Ice cream: Ice cream (derived from earlier iced cream or cream ice) is a sweetened frozen food typically eaten as a snack or dessert.  It is usually made from dairy products, such as milk and cream, and often combined with fruits or other ingredients and flavors.  It is typically sweetened with sugar or sugar substitutes. Typically, flavourings and colourings are added in addition to stabilizers.  The mixture is stirred to incorporate air spaces and cooled below the freezing point of water to prevent detectable ice crystals from forming.  The result is a smooth, semi-solid foam that is solid at very low temperatures (< 35 F ).  It becomes more malleable as its temperature increases.

Tartaric acid: Tartaric acid is a white crystalline organic acid that occurs naturally in many plants, most notably in grapes. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of winemaking.  It is commonly mixed with sodium bicarbonate and is sold as baking powder used as a leavening agent in food preparation.  The acid itself is added to foods as an antioxidant and to impart its distinctive sour taste.

Marshmallow: A marshmallow is a sugar-based confection that, in its modern form, typically consists of sugar, water and gelatin which is whipped to a spongy consistency, molded into small cylindrical pieces, and coated with corn starch.  Some marshmallow recipes call for eggs.  This confection is the modern version of a medicinal confection made from "Althaea officinalis", the marshmallow plant.

Potassium bitartrate: Potassium bitartrate, also known as potassium hydrogen tartrate, with formula KCHO, is a byproduct of winemaking.  In cooking it is known as cream of tartar.  It is the potassium acid salt of tartaric acid (a carboxylic acid).  It can be used in baking or as a cleaning solution (when mixed with an acidic solution such as lemon juice or white vinegar).

Potassium: Potassium is a chemical element with symbol K (from Neo-Latin "kalium") and atomic number 19.  It was first isolated from potash, the ashes of plants, from which its name derives.  In the periodic table, potassium is one of the alkali metals. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts.  Potassium in nature occurs only in ionic salts.  Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction and burning with a lilac-colored flame.  It is found dissolved in sea water (which is 0.04% potassium by weight), and is part of many minerals.

Sugar cake: Sugar cake is a confection made with coconut and sugar with flavorings and it is put into moulds and baked.  It is a popular sweet among schoolchildren in Caribbean countries including Barbados, Trinidad and Tobago and Guyana.

Weinstein: Weinstein is a German-language surname meaning "wine stone", referring to the crystals of potassium bitartrate resulting from the process of fermenting grape juice.

Potassium humate: Potassium humate is the potassium salt of humic acid.  It is manufactured commercially by alkaline extraction of brown coal (lignite)  Leonardite to be used mainly as a soil conditioner.  The extraction is performed in water with the addition of potassium hydroxide (KOH), sequestering agents and hydrotropic surfactants.  Heat is used to increase the solubility of humic acids and hence more potassium humate can be extracted.  The resulting liquid is dried to produce the amorphous crystalline like product which can then be added as a granule to fertiliser.  The potassium humate granules by way of chemical extraction lose their hydrophobic properties and are now soluble.  Depending on the source material product quality varies.  High quality oxidised lignite (brown coal), usually referred to as leonardite, is the best source material for extraction of large quantities of potassium humate.  The less oxidised the coal the less potassium humate extracted.  Sources low in ash produce the best quality.  Less oxidised brown coal contains a higher proportion of the insoluble humin fraction and along with peat which is lower in humic acid content and usually high in ash content requires separation by filtration or centrifugation to remove ash, humin.  Peat is also high in non humified organic matter that needs to be reduced to produce a high quality product.  The benefit of peat is that it is usually 2-3 times higher in fulvic acid content, which are the low molecular weight fractions of humic acid that are high in oxygen containing functional groups and soluble at a low pH of <1.  Fulvic acids have a higher cation exchange capacity and therefore have a higher chemical interaction with fertilisers and are able to form soluble chelates of trace metals.

Potassium tartrate: Potassium tartrate, dipotassium tartrate or argol has formula KCHO.  It is the potassium salt of tartaric acid.  It is often confused with potassium bitartrate, also known as cream of tartar.  As a food additive, it shares the E number E336 with potassium bitartrate.

Edinburgh rock: Edinburgh rock or Edinburgh Castle rock is a traditional Scottish confection, and is quite distinct from conventional rock.  It consists of sugar, water, cream of tartar, colourings and flavourings.  It is formed into sticks, and has a soft and crumbly texture.

Supporting paragraphs: Edinburgh rock Potassium bitartrate
Answer: Edinburgh rock