marshmallow fluff

Marshmallow fluff is a confectionery spread consisting of whipped egg whites or gelatin combined with corn syrup, powdered sugar, cornstarch, and vanilla flavoring, creating a light, airy foam with a dense yet yielding texture. Developed in Massachusetts in the early 20th century, it represents an industrialized adaptation of the traditional marshmallow confection into a spoonable spread format. The ingredient is characteristically white or pale off-white, with a smooth, creamy consistency that distinguishes it from solid marshmallows. The primary commercial product is proprietary in formulation, though various manufacturers produce similar products with slightly different stabilizing agents and flavor profiles.

Marshmallow fluff functions primarily as a filling, topping, and mixing ingredient in American dessert preparations. It is classically paired with peanut butter to create the "Fluffernutter" sandwich, whipped into frostings for cakes and cupcakes, swirled into ice cream, and used to top hot chocolate and other beverages. In baking, it can be folded into batters to create light, cloud-like textures in brownies, cookies, and cakes. It also serves as a component in pie fillings, candy confections, and s'mores-adjacent applications. The ingredient's primary culinary value lies in its ability to add volume, sweetness, and textural contrast with minimal density.