2 3/4 cups powdered sugar
6 tablespoons unsweetened cocoa powder
6 tablespoons butter
5 tablespoons milk
1 teaspoon vanilla extract
In a medium bowl, sift together the sugar and cocoa, and set aside. In a large bowl, cream butter until smooth, then gradually beat in sugar mixture alternately with milk. Add vanilla. Beat until light and fluffy. If necessary, adjust consistency with more milk or sugar.