Name: Marshmallow Fluff Fudge
Prep time: 10 min
Total time: 2 h 10 min
Cuisine: American
Ingredients: ¾ cup salted sweet cream butter; 12 ounces semi-sweet chocolate chips; 7 ounces marshmallow fluff; Optional Add-ins:; 1 teaspoon vanilla extract (for extra flavor); ½ cup chopped walnuts or pecans (for texture); 2 tablespoons peanut butter or caramel (for swirling); Mini marshmallows or crushed peppermint (for topping)

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Marshmallow Fluff Fudge is one of those timeless, no-fail desserts I love to whip up when I need something rich, chocolatey, and irresistibly creamy. With just a few ingredients and minimal effort, this smooth and decadent fudge melts in the mouth and delivers that classic chocolate-marshmallow combo everyone craves. It’s perfect for holidays, gift boxes, or whenever I’m in the mood for a little indulgence.

Why I Love This Recipe

I love how incredibly easy this fudge is to make. No candy thermometer, no fancy steps—just melt, mix, and chill. The marshmallow fluff gives it that perfect soft, melt-in-my-mouth texture, and the semi-sweet chocolate balances the sweetness beautifully. It’s the kind of recipe I can always count on, especially when I need a last-minute dessert that looks impressive but takes very little time to make.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

¾ cup salted sweet cream butter
12 ounces semi-sweet chocolate chips
7 ounces marshmallow fluff

Directions

I start by lining an 8×8-inch or 9×9-inch baking dish with parchment paper or lightly greasing it for easy removal later.
In a saucepan over medium heat, I melt the butter until completely smooth.
I lower the heat and add in the semi-sweet chocolate chips, stirring constantly until they are fully melted and the mixture is smooth.
Then I remove the pan from heat and quickly stir in the marshmallow fluff. I mix until the fluff is fully incorporated and the fudge is silky.
I pour the mixture into the prepared baking dish, smoothing the top with a spatula.
I chill the fudge in the refrigerator for at least 2 hours, or until firm.
Once set, I cut it into squares and serve, or store for later.

Servings and timing

This recipe makes about 16–25 squares, depending on how I slice it.
Prep time: 10 minutes
Chill time: 2 hours
Total time: About 2 hours and 10 minutes

Variations

I sometimes add a teaspoon of vanilla extract for extra depth of flavor.
For a nutty twist, I fold in chopped walnuts or pecans before chilling.
Swirling in a few spoonfuls of peanut butter or caramel sauce creates a marbled effect that looks and tastes amazing.
I’ve also topped it with mini marshmallows or crushed peppermint during the holidays.

Storage/Reheating

I store the fudge in an airtight container in the refrigerator for up to 1 week. For longer storage, I freeze it for up to 2 months—just wrap the squares in wax paper and seal in a freezer-safe bag. When ready to eat, I thaw it in the fridge overnight. There’s no need to reheat; I serve it chilled or at room temperature.

FAQs

Can I use milk chocolate instead of semi-sweet?

Yes, I’ve swapped in milk chocolate before for a sweeter fudge. I just adjust the amount of butter slightly if needed to keep the texture smooth.

What’s the difference between marshmallow fluff and mini marshmallows?

Marshmallow fluff blends more easily into the fudge and gives a smoother consistency, which is why I prefer using it here.

How do I keep the fudge from sticking to the pan?

I always line the pan with parchment paper or foil with a bit of overhang—it makes lifting and cutting the fudge so much easier.

Can I double this recipe?

Absolutely. I double the ingredients and pour it into a 9×13-inch pan when I’m making it for a crowd.

Does this fudge need to stay refrigerated?

It holds up fine at room temperature for a few hours, but I usually keep it chilled for the best texture and longer shelf life.

Conclusion

Marshmallow Fluff Fudge is one of those easy, dependable treats I keep in my recipe box year-round. It’s smooth, rich, and always a crowd-pleaser with minimal effort required. Whether I’m making it for holiday trays, gifting, or just a sweet fix for myself, this fudge never disappoints. It’s a chocolate lover’s dream that comes together in minutes and disappears just as fast.