7-Minute Icing
["2 egg whites", "1 1/2 c. sugar", "1/3 c. water", "dash of salt", "1 tsp. vanilla"]
["Combine all ingredients in top of double boiler. Place over boiling water.", "Beat with electric mixer until thick and smooth. Spread on cake."]
["egg whites", "sugar", "water", "salt", "vanilla"]