Marshmallow Fluff is an iconic brand of marshmallow cream manufactured by the Durkee-Mower company of Lynn, Massachusetts, since 1920. See marshmallows. The sticky sweet spread is a staple comfort food in New England, where it is best known as an essential layer of the fluffernutter—a Marshmallow Fluff and peanut butter sandwich.
Fluff is also a versatile baking ingredient. It can substitute for marshmallows as a topping on hot cocoa or sweet potatoes, or serve as a sweet adhesive in whoopee pies, frostings, fudge, Rice Krispies treats, meringues, salads, candies, fillings, chiffon pies, sorbets, shakes, and cheesecakes. Diluted, it becomes a dessert sauce.