1 stick (1/2 cup) butter or margarine
2/3 cup Hersheys cocoa
3 cups powdered sugar (confectioners sugar)
1/3 cup milk (plus an additional few drops to make a nice consistency)
1 teaspoon vanilla

Melt butter. Stir in cocoa. Alternately add powdered sugar and milk, beating on medium speed to spreading consistency. Add more milk if needed. Stir in vanilla. About 2 cups frosting