Chocolate Cake Icing
["3 to 4 c. powdered sugar", "2 to 3 Tbsp. butter", "milk (by the Tbsp. to get the proper consistency to ice cake)", "1/3 c. packed cocoa", "1/2 tsp. vanilla (optional)"]
["Sift together powdered sugar with cocoa. Melt butter. Pour butter over sugar/cocoa mixture. Use an electric mixer and add milk by the tablespoon to get the icing of consistency you want. If it's too thin, add a bit more powdered sugar. If it's too thick, add another tablespoon of milk."]
["powdered sugar", "butter", "milk", "cocoa", "vanilla"]