, Powdered sugar it is a reproduct of sucrose, a pure white powder with the same flavor as sucrose. It is commonly used in heavy cream cake or cake decoration. ③, syrup-converted syrup or starch syrup, converted syrup which is made by boiling granulated sugar with water and acid; starch syrup, also known as glucose syrup, etc., usually use corn starch hydrolyzed with acid or enzyme, decolorized and concentrated into a viscous liquid. It can be used for cake decoration, and is often added in the production of cake batter abroad to improve the flavor and freshness of the cake. 2, sugar in the cake function: ①, increase the sweetness of products, improve nutritional value; ②, the skin color, in the baking process, the cake surface becomes brown and emit fragrance. ③, filling effect, so that the batter is smooth and delicate, soft products, which is the main role of sugar.