Whisk softened butter with granulated sugar until very smooth
Blend granulated sugar in a blender or food processor until powdery, then use it like powdered sugar
Beat cream cheese with butter and a little vanilla for a simple frosting
Whisk cocoa powder, butter, milk, and granulated sugar for chocolate icing
Cook milk and flour into a paste, cool it, then beat with butter and sugar for a boiled-style frosting
Whip heavy cream with granulated sugar and vanilla for a light icing
Mix peanut butter with butter and honey or maple syrup for a thick icing
Stir cream cheese with honey or maple syrup for a quick glaze
Combine melted chocolate with butter or cream for a glossy icing
Use marshmallow fluff with butter for a smooth frosting
Mix condensed milk with butter and flavoring for a sweet icing
Beat egg whites with granulated sugar over heat for a meringue-style icing