Seven Minute Icing - cooking recipe

Ingredients

2 egg whites
1/4 tsp. cream of tartar
1/16 tsp. salt
1 1/2 c. sugar
1/3 c. cold water
1 tsp. vanilla

Preparation

Place all ingredients except vanilla in a double boiler; mix thoroughly.
Cook, beating steadily until frosting peaks, about 7 minutes.
Remove from heat; add vanilla and beat until thick.