Remember my daughters cake from the other day. Here is the recipe for the butter cream frosting.
I frosted underneath all the fondant and all the decoration on the castle with butter cream frosting. It was really easy to make.
Butter Cream Frosting
1/2 c shortening
1 drop butter flavoring
1 tsp vanilla
1 lb powdered sugar
1/4 c water
Mix the shortening, butter flavoring, and vanilla together. Then slowly add the powdered sugar and water until you get the consistency of whipped butter and whipping cream together. It will be nice and fluffy. You can add coloring to it as desired.