Decorating Buttercream Icing(From Decorating Classes)  
["1 lb. 4x sugar", "1/4 lb. (1/2 c.) soft butter or margarine", "1/4 lb. (1/2 c.) cake shortening (Crisco)", "1/8 tsp. salt", "3 to 4 Tbsp. milk", "vanilla to taste"]
["Blend butter and shortening. Add sugar, vanilla and 2 tablespoons milk.", "Cream to proper consistency.", "Use rest of milk, if necessary."]
["butter", "cake shortening", "salt", "milk", "vanilla"]