Prepare and bake cake according to package directions for cupcakes, using paper-lined muffin cups. Cool for 10 minutes before removing from pans to wire racks to cool completely.
Meanwhile in a mixing bowl, cream shortening and sugar. Add marshmallow creme and vanilla; mix well. Insert a very small pastry tip into a pastry or plastic bag; fill with cream filling. Insert tip halfway into the center of each cupcake and fill with a small amount. Frost with chocolate frosting. Yield: 2 dozen.
Meanwhile in a mixing bowl, cream shortening and sugar. Add marshmallow creme and vanilla; mix well. Insert a very small pastry tip into a pastry or plastic bag; fill with cream filling. Insert tip halfway into the center of each cupcake and fill with a small amount. Frost with chocolate frosting. Yield: 2 dozen.
