3 large egg whites
4 cups confectioners’ sugar
food coloring (optional)
Begin mixing eggwhites at medium speed until frothy.
Add the confectioners’ sugar and continue beating until blended.
Increase the speed to high and beat until the mixture is thick and shiny, about 3 minutes.
Put a damp paper towel directly on the icing to keep a skim from forming. If not using within 2 hours, cover the bowl with plastic and refrigerate.