Frosting 16 ounces confectioners' sugar 1/2 cup cocoa 1/2 cup (1 stick) margarine 1 teaspoon vanilla extract 1/2 cup evaporated milk
Mix all cake ingredients together well with a spoon and bake in a 13 x 9-inch baking pan at 350 degrees F for 30-40 minutes.
After the cake has cooled and while still hot, spread 1 jar Marshmallow Creme over the top of the cake. After the cake has cooled completely, frost with frosting.
To make the frosting, mix all ingredients together well in a large bowl with an electric mixer.