I modified my regular buttercream for a chocolate version. It tastes good enough to just eat without cake! It also crusts really well and is good for piping decorations.
Crusting Chocolate Buttercream
1/2 c shortening (WITH trans-fats)
1/2 c butter or margarine
1/3 c powdered non dairy coffee creamer
1/2 c cocoa
1/2 c water
1/4 tsp. salt
2 tsp. vanilla
2 lbs pwd sugar
Add salt to water in measuring cup so it can dissolve. Cream margarine and shortening well. Add creamer and cocoa and mix well until fluffy (4 or 5 minutes). Add powdered sugar, vanilla and water. Mix for about 5-8 minutes or so til nice and creamy.