Does anyone have a recipe for chocolate crusting buttercream?

This is the one I use.

1/2 cup crisco
1 stick butter
4 cups powdered sugar
2/3-3/4 cups cocoa(depending on how chocolatey)
milk or half and half to thin

This recipe can be doubled.

I usually use 3/4 cup cocoa because I like my frosting to be darker and really chocolatey.