1/2 cup solid shortening
1 stick butter, softened
1 tsp vanilla (clear if possible)
4 cups confectioners sugar (about 1 lb)
2 tbs milk
Cream shortening and butter with electric mixer. Add the vanilla. Gradually add the sugar, one cup at a time while beating well. When the sugar has been mixed in, the icing will appear to be dry. Add the milk and keep beating with the mixer until light and fluffy. If you need more milk, add tiny drops at a time until you reach desired consistency.