Cake decorating is one of the sugar arts that uses icing or frosting and other edible decorative elements to make plain cakes more visually interesting. Alternatively, cakes can be molded and sculpted to resemble three-dimensional persons, places and things.

Cakes are decorated to mark a special celebration (such as a birthday or wedding). They can also mark national or religious holidays, or be used to promote commercial enterprises. However, cakes may be baked and decorated for almost any social occasion.

Decorating a cake usually involves covering it with some form of icing and then using decorative sugar, candy, chocolate or icing decorations to embellish the cake. But it can also be as simple as sprinkling a fine coat of icing sugar or drizzling a glossy blanket of glaze over the top of a cake. Icing decorations can be made by either piping icing flowers and decorative borders or by molding sugar paste, fondant, or marzipan flowers and figures.