Buttercream Frosting
["1/2 c. (1 stick) butter", "3 1/2 to 4 c. (1 lb. pkg.) powdered sugar", "1 Tbsp. milk or cream", "1 tsp. vanilla", "1 tsp. salt", "1 egg"]
["In a small mixing bowl, cream butter; add 1/3 of the sugar and beat well.", "Add egg, vanilla, salt and cream; beat until smooth. Gradually add remaining sugar, beating until smooth.", "If frosting is too thick, additional cream may be added."]
["butter", "powdered sugar", "milk", "vanilla", "salt", "egg"]