Cake cover is a term used to describe the topping or decoration of a cake. The two most common types of cake cover are FROSTING and icing. FROSTING is a thick, creamy substance made from butter, sugar, and milk that is spread over the top and sides of a cake. Icing is a thinner, sweeter mixture made from sugar and water that is poured over the cake. Both FROSTING and icing can be flavored and colored to create a unique look for the cake.