Cake Frosting
["2 c. powdered sugar", "3/4 c. shortening", "1 tsp. vanilla", "2 egg whites"]
["In small bowl, combine 1/2 cup sugar, shortening, vanilla and egg whites.", "Blend well.", "Beat in remaining sugar until smooth and creamy.", "Optionally, flavor with chocolate or strawberry, and frost cake."]
["powdered sugar", "shortening", "vanilla", "egg whites"]