Seven Minute Frosting
["2 egg whites, unbeaten", "1 1/2 c. sugar", "5 Tbsp. water", "1/4 tsp. cream of tartar", "1/2 tsp. vanilla"]
["Place over boiling water and beat with rotary beater until mixture holds its shape.", "Fold in vanilla.", "Beat until cool and spread."]
["egg whites", "sugar", "water", "cream of tartar", "vanilla"]