1) Cream the butter in a small bowl.
2) Blend in the cocoa powder (the amount desired for a light, medium or dark flavor), vanilla, confectioners sugar, alternately with the cream.
3) Beat with an electric mixer, until the desired texture is achieved.
Note: because of the additional cocoa powder more cream may have to be added in to reach desired consistency.
You may use unwhipped whipping cream in place of half and half or 1/3 cup whole milk.
The nutritional info is only about the frosting itself.