Best Substitutes for Marshmallow Fluff
Marshmallow fluff is basically sugar, corn syrup, egg whites, and gelatin whipped into an airy, sticky paste. A 7-ounce jar contains about 80% sugar by weight, with the rest being water and stabilizers. The texture comes from tiny air bubbles trapped in a sugar syrup matrix, giving it that signature stretchy, gooey consistency. When you substitute, you need something that matches both the sweetness level (about 16 grams of sugar per tablespoon) and the binding properties that hold batters and frostings together. Most alternatives won't replicate the exact stretch and stickiness, but they can deliver similar sweetness and moisture in your finished recipe.
Best Overall Substitute
Mini marshmallows melted with 2 tablespoons of water per 1 cup of marshmallows. Heat in 30-second microwave intervals until smooth. This creates essentially the same product as jarred fluff since both start with the same base ingredients. The texture matches perfectly once cooled to room temperature.
All Substitutes
Mini marshmallows (melted)
1 cup mini marshmallows + 2 tablespoons water = 1/2 cup fluffMini marshmallows are just fluff in solid form. Melting them with a small amount of water recreates the original consistency. Heat in 30-second microwave bursts, stirring between each interval. The mixture will be lumpy at first, then suddenly smooth out around 90 seconds total heating time. Let it cool for 15 minutes to thicken to the right consistency.
Homemade marshmallow fluff
1:1 replacementMade with 3/4 cup sugar, 1/2 cup corn syrup, 1/4 cup water, 2 egg whites, and 1/4 teaspoon vanilla. Heat sugar mixture to 240F (soft ball stage), then slowly drizzle into whipped egg whites while beating. The result is fresher-tasting than store-bought and you control the sweetness level. Takes about 15 minutes of active mixing time.
Whipped cream cheese frosting
8 oz cream cheese + 1/2 cup powdered sugar + 1/4 cup heavy cream replaces 7 oz fluffBeat cream cheese until fluffy (about 3 minutes), then gradually add powdered sugar and cream. The tanginess balances sweetness differently than fluff, but the texture works similarly in frostings and dips. It's less sweet, so add an extra 2 tablespoons of powdered sugar if your recipe relies heavily on fluff's sweetness.
Aquafaba fluff
1/2 cup aquafaba + 1/2 cup sugar + 1/4 teaspoon cream of tartar replaces 7 oz fluffWhip aquafaba (chickpea liquid) with cream of tartar until soft peaks form (8-10 minutes with a stand mixer). Gradually add sugar and beat until stiff peaks hold for 30 seconds. The consistency mimics fluff but deflates faster, so use immediately. Works best in recipes where it gets mixed into other ingredients rather than standing alone.
Sweetened whipped cream
1 cup heavy cream + 1/4 cup powdered sugar replaces 7 oz fluffWhip cream to soft peaks (about 4 minutes), then add powdered sugar and beat to medium peaks. Much lighter and less sweet than fluff, but provides similar volume and creamy texture. Use immediately since it deflates within 2 hours. Add 1 teaspoon gelatin dissolved in 2 tablespoons warm water for more stability.
Powdered sugar buttercream
1/2 cup butter + 2 cups powdered sugar + 2-3 tablespoons milk replaces 7 oz fluffBeat butter until fluffy (5 minutes), then alternate adding powdered sugar and milk until smooth and pipeable. Much richer than fluff but provides similar sweetness and binding properties in frosting applications. The fat content helps it hold shape better than fluff-based frostings.
Corn syrup mixture
1/2 cup corn syrup + 1/4 cup powdered sugar + 2 tablespoons water replaces 7 oz fluffWhisk ingredients until smooth. The corn syrup provides the sticky, stretchy quality while powdered sugar adds bulk and sweetness. Consistency is thinner than fluff but works in most baking applications where fluff gets mixed into batters. Not suitable for spreading or piping.
Greek yogurt sweetener blend
1 cup Greek yogurt + 1/3 cup honey + 1 tablespoon cornstarch replaces 7 oz fluffWhisk cornstarch with 2 tablespoons of the honey until smooth, then fold into yogurt with remaining honey. The tanginess cuts through sweetness, making desserts less cloying. Much lower in sugar but higher in protein. Consistency is thicker than fluff and won't melt the same way when heated.
Coconut cream fluff
1 can chilled coconut cream + 1/3 cup powdered sugar + 1/2 teaspoon vanilla replaces 7 oz fluffChill coconut cream can overnight. Scoop out only the solid white layer (about 3/4 cup), leaving the liquid behind. Whip with powdered sugar and vanilla until peaks form (6-8 minutes). Results in a lighter, less sweet alternative with subtle coconut flavor. Must be kept chilled or it melts quickly.
How to Adjust Your Recipe
When subbing fluff, consider the recipe's method first. Folding applications (mousses, whipped frostings) work best with airy substitutes like whipped cream or aquafaba fluff. Melting recipes (fudge, candy bars) need sticky substitutes like melted marshmallows or corn syrup blends. Reduce other liquids by 2-3 tablespoons when using yogurt-based subs since they add moisture. For baking, decrease oven temperature by 15F when using cream-based substitutes since dairy browns faster than sugar-based fluff.
When Not to Substitute
Classic s'mores need real fluff because nothing else provides that specific torch-able, stretchy quality when heated. Divinity candy and nougat recipes depend on fluff's exact sugar concentration and gelatin content for proper setting. Seven-minute frosting recipes that call for adding fluff to stabilize the meringue won't work with most substitutes since they lack the binding proteins.
Frequently Asked Questions
Can I make my own marshmallow fluff without corn syrup?
Yes, replace corn syrup with 1/2 cup honey plus 2 tablespoons water in the standard recipe. Heat the honey mixture to 235F instead of 240F since honey burns more easily. The texture will be slightly less glossy but tastes better than store-bought. Total cooking time is about 12 minutes.
How much mini marshmallows equal one jar of fluff?
About 4 cups of mini marshmallows melted with 1/4 cup water equals one 7-ounce jar of fluff. Heat in 45-second microwave intervals, stirring between each. The mixture will seem too thick at first, then suddenly become smooth after 2-3 heating cycles.
What's the lowest sugar substitute for marshmallow fluff?
Greek yogurt with 2 tablespoons honey per cup contains about 75% less sugar than fluff. Add 1 tablespoon cornstarch to thicken it to a similar consistency. This works in dips and light frostings but won't behave the same way in candy recipes that rely on sugar's chemical properties.
Can I substitute fluff in Rice Krispie treats?
Yes, use 4 cups mini marshmallows instead of 1/2 cup fluff. The treats will be slightly chewier but taste identical. Melt the marshmallows with 2 tablespoons butter over low heat, stirring constantly for 3-4 minutes until smooth, then add cereal immediately.
Why does homemade fluff deflate faster than store-bought?
Store-bought contains stabilizers like tetrasodium pyrophosphate that help maintain structure for months. Homemade fluff lasts about 5 days in the fridge and deflates because the egg proteins break down over time. Adding 1/4 teaspoon cream of tartar helps it hold for an extra 2-3 days.