Butter Frosting For Cake Decorating
["2 lb. powdered sugar", "1/2 c. warm water", "1/2 tsp. salt", "1 c. shortening *", "flavoring (your choice)"]
["Beat at low speed.", "To thin, add water.", "To thicken, add powdered sugar."]
["powdered sugar", "warm water", "salt", "shortening"]