Fluffernutter Marshmallow Fluff will add rich marshmallow flavor to many dishes. This Marshmallow topping, 7.5 oz (pack of 12), is gluten free and kosher. Use marshmallow frosting fluff to make icing, fudge or sweet potato casseroles. Put it into peanut butter sandwiches or use it in homemade graham cracker s'mores. This marshmallow topping is easier to cook and work with than traditional marshmallows.