Butter Icing For Sugar Cookies - cooking recipe

Ingredients

4 tsp. unbeaten egg whites (approximately)
2 tsp. melted butter
1 1/4 c. sifted confectioners sugar
1/8 tsp. vanilla
few grains salt

Preparation

Beat all ingredients well.
Consistency is improved by thoroughly beating.
For thinner icing, add more egg white; for thicker icing, add more sugar.
Keep bowl covered with damp towel.