Buttercream Frosting
["1 lb. powdered sugar", "1 stick soft butter or margarine", "3 to 4 Tbsp. cream or milk", "1 1/2 tsp. vanilla"]
["Cream sugar and butter or margarine.", "Add milk; continue beating to right consistency.", "Add vanilla.", "Spread over cake."]
["powdered sugar", "butter", "cream", "vanilla"]