Double Boiler Frosting
["2 egg whites", "1 1/2 c sugar", "1/4 tsp cream of tartar or 1 tbsp light corn syrup", "1/3 c water", "1 tsp vanilla"]
["Mix all ingredients except vanilla in top of double boiler. Place over boiling water; beat with beaters until stiff peaks form. Scrape sides and bottom of pan occasionally. Fold in vanilla."]
["egg whites", "sugar", "cream of tartar", "water", "vanilla"]