3 1/2 cups, packed confectioner's sugar
1/3 cup egg whites (2-3 eggs) room temp.
1/4 teaspoon cream of tarter

Strain sugar through strainer. Beat egg whites with 2 cups of sugar at high speed for 5 minutes. Beat in cream of tarter. Continue adding sugar to the desired consistency, (firm enough to hold shape). If too thick add a few drops of water, if too thin add sugar.

Spread with knife or use a pastry decorating bag.