Icing or frosting is used to cover or decorate baked goods like cakes and cookies. It is made of sugar with a liquid such as water or milk, and often contains ingredients like butter, cream cheese or flavorings. Common types of icing include buttercream, whipped cream, royal icing, cream cheese frosting, and fondant. Buttercream is soft and spreadable, whipped cream is light and fluffy, royal icing is white and hardens, cream cheese frosting is creamy and rich, while fondant can be molded and sculpted. Icing can be tinted with food coloring and decorated with sprinkles or other toppings.