Dark Chocolate Frosting
["1/2 c. butter or margarine", "3 c. 10x sugar", "1/2 c. dry cocoa", "6 Tbsp. milk", "1 tsp. vanilla"]
["Microwave butter until melted.", "Add remaining ingredients. Stir and microwave, stirring everything 30 to 40 seconds, until frosting is smooth and dark chocolate color.", "Spread on cooled cake."]
["butter", "sugar", "cocoa", "milk", "vanilla"]