INGREDIENTS serves : 10-12   1 package cake mix of your choice (regular size) 1 cup butter, softened 1 cup shortening 12 cups confectioners’ sugar (about 3 pounds) 1 tablespoon vanilla extract 1/4 teaspoon salt 3/4 to 1 cup milk Blue, yellow and green gel, paste or liquid food coloring   Directions for Cake with Buttercream Decorating Frosting Recipe […]