Cake decoration is an art form that involves the use of icing, PIPING, and CANDLES to create a visually appealing cake. Icing is a sweet, creamy substance made from sugar, butter, and milk that is used to cover cakes and cupcakes. PIPING is a technique used to create intricate designs on cakes using a pastry bag and various tips. CANDLES are used to add a festive touch to cakes, often in the form of birthday CANDLES. All three elements are essential for creating a beautiful cake decoration.