Chocolate Marshmallow Frosting Recipe Martha Stewart. Inside our No Bake Birthday Cake is this fluffy filling made of melted chocolate and marshmallows. Source Martha Stewart Kids, Spring 2. Creamy frosting that doesnt need to be refrigerated, so its perfect for potluck dinners. Makes enough to frost a bundt cake or the top of a 13x9 inch cakedouble it. Makes enough to fill 1 crisp rice cake. The Food Newsletter. Great tips recipes delivered to your inbox. Chocolate Marshmallow Frosting Betty CrockerChocolate Marshmallow Frosting Recipe. Chocolate Marshmallow Frosting' title='Chocolate Marshmallow Frosting' />This fluffy filling is made of melted chocolate and marshmallows, perfect for Marthas NoBake Birthday Cake of crisp rice cereal and marshmallows. In a stand up mixer, beat the butter until smooth. Add the cooled chocolate and Marshmallow Creme to the butter and mix on medium speed. Gradually add in the powdered sugar one cup at a time with 1 tablespoon of milk. Halloween Monkey Bread. Add enough of each to get a fluffy frosting consistency.