Mock Buttercream Frosting

This is a basic "buttercream" frosting. You can add a little more vanilla extract to make it a little extra special tasting.1/3 cup palm shortening or Earth Balance margarine3 cups powdered sugar2 tbsp. rice milk plus more for thinning2 tsp. vanilla extractBeat palm shortening at high speed with an electric mixer until fluffy. Add 1 cup of powdered sugar and beat. Add a tablespoon or so of