Seven Minute Icing
["1 1/2 c. sugar", "3 egg whites, unbeaten", "1 1/2 tsp. vanilla flavoring", "1/4 tsp. salt", "4 1/2 Tbsp. water"]
["Combine ingredients and cook in double boiler, beating constantly with hand mixer for 7 minutes.", "Scrape bottom and sides constantly with spoon.", "Icing should be smooth, but stiff.", "Will cover a layer cake generously."]
["sugar", "egg whites", "vanilla flavoring", "salt", "water"]