Fluffernutter Dessert: Addictive Peanut Butter Marshmallow Brownies That Steal the Show
Fluffernutter Dessert kicks things off with a bang, and honestly, your oven might want hazard pay after this one. These decadent, gooey, unapologetically rich Peanut Butter Marshmallow Brownies take everything you love about classic brownies and send it straight into over-the-top territory. Chocolate? Check. Peanut butter? Obviously. Marshmallow fluff? Oh, absolutely. This isn’t just a sweet treat. It’s a full-on experience. Ever bitten into something so good you had to pause and rethink your life choices? Yeah, that’s what we’re dealing with here.
Let’s be real. Some desserts whisper. These shout. They strut. They casually lean on the counter like they know they’re the star of your dessert table. And honestly? They are.
Why These Fluffernutter Brownies Are So Ridiculously Irresistible
There’s a reason people obsess over Fluffernutter Brownies. That magical combo of peanut butter and marshmallow fluff isn’t just nostalgic. It’s legendary. Layer that between two slabs of ultra-fudgy brownie and suddenly you’ve created something that feels bakery-level fancy but still totally doable at home.
The brownie layers bring deep, intense chocolate flavor. The peanut butter adds rich creaminess. The marshmallow fluff swoops in with a cloud-like sweetness. Together? Pure chaos in the best way possible.
Key Tip: Don’t rush the layers. Let each one shine. Patience = perfection.
IMO, this combo ranks right up there with the wildest, most Bakery Recipes Unique fans crave.

What Exactly Is a Fluffernutter Anyway?
A fluffernutter started as a classic sandwich. Peanut butter on one slice. Marshmallow creme on the other. Smash them together and boom, instant childhood nostalgia. Simple, sweet, and wildly addictive. That flavor duo exploded into baked goods, leading to dreamy creations like Fluffernutter Recipes and now, these brownies.
This recipe takes that humble sandwich and glams it up into a rich, layered dessert that belongs front and center at any party. Think of it as the glow-up marshmallow never knew it needed.
Ingredients Breakdown: Why Each One Matters
Everything in this recipe plays a role. No fillers, no nonsense, just flavor powerhouses working together.
Cocoa Powder
Unsweetened cocoa gives the brownies their deep chocolate base. Want darker brownies? Try Dutch-processed for a richer hue and bolder flavor.
Butter
This recipe doesn’t believe in “light.” Butter delivers that fudgy, melt-in-your-mouth texture. Use unsalted for better control over flavor.
Sugar
Melting sugar with butter creates that glossy, dense brownie texture everyone loves. Skip this step? Brave but foolish.
Espresso Powder
Sounds fancy, right? It amps up chocolate flavor without screaming coffee. FYI, don’t skip it unless you absolutely must.
Chocolate Chips
Semi-sweet chips keep the chocolate balanced and luxurious.
Peanut Butter
Creamy peanut butter creates silky layers, but crunchy works if you like a little texture surprise.
Marshmallow Fluff
This is where the magic happens. It delivers that signature fluffiness found in favorite Marshmallow Recipes Desserts everywhere.
Simple How-To: The Big Picture (No Stress)
You’re layering, not overthinking. That’s the vibe.
First layer of brownie batter goes into the pan. Smooth it out.
Add a layer of peanut butter. Spread gently. No chaos needed.
Follow with marshmallow fluff. Think creamy clouds.
Top with remaining brownie batter.
Bake until set but still fudgy.
Cool completely before slicing, unless you enjoy molten brownie avalanches.
Key Tip: Let the brownies cool fully. Your knife will thank you.
The Story Behind This Sweet Chaos
The inspiration comes straight from classic Fluffernutter Cookie Bars and sandwich nostalgia. Someone, somewhere, looked at a fluffernutter and said, “What if this wore a chocolate tuxedo?” And thus, the idea for this luxurious Fluffernutter Bar Dessert was born.
It’s not just dessert. It’s comfort, childhood, and indulgence all wrapped into one pan of unapologetic goodness. Every bite brings that warm, familiar sweetness with a bold bakery twist.
Pro Tips for Bakery-Worthy Results
Want those glossy tops and gooey middles? Follow these like gospel:
Use room temp ingredients. Everything blends smoother.
Don’t overmix batter. Overworking leads to cakey sadness.
Line your pan. Parchment saves lives. And brownies.
Knife trick: Warm your knife before slicing for clean edges.
Seriously, ignoring these tips would feel like ignoring GPS and driving into a lake. Dramatic? Sure. Accurate? Absolutely.
Fun Variations You’ll Want to Try
Feeling creative? These brownies love a remix.
Drizzle with dark chocolate ganache for extra drama.
Add chopped peanuts for crunchy contrast.
Swirl Nutella into the brownie layers.
Top with mini marshmallows before baking.
Turn them into Fluffernutter Cookie Bars for portable party treats.
Each twist keeps the soul of the original while giving you new ways to fall in love.
Best Ways to Serve These Beauties
Serve warm with vanilla ice cream. Instant applause.
Pair with cold milk or hot coffee.
Cut into bite-sized squares for parties.
Stack them high and pretend you run a dessert café.
These brownies thrive at birthdays, movie nights, potlucks, or random Tuesday “I deserve this” moments.
Storage & Leftover Tips (If Any Survive)
Store cooled brownies in an airtight container at room temp for up to 3 days.
Refrigerate for firmer texture if you prefer chewy over gooey.
For longer storage, freeze with parchment between layers. They last 1–2 months easy.
When reheating, warm gently so the marshmallow layer stays dreamy, not rubbery.

FAQs About These Fluffernutter Brownies
Can I halve the recipe?
Yep. Use an 8 or 9-inch pan and keep an eye on bake time.
Can I swap peanut butter?
Almond butter works but changes the classic flavor vibe.
Does marshmallow fluff melt?
It softens and blends beautifully, creating that luscious layer everyone loves.
Are these overly sweet?
They’re rich, yes. Overpowering? Not if you respect portion control. Keyword: respect.
Can I make these ahead?
Absolutely. They taste even better the next day once flavors settle.
Why This Recipe Deserves a Spot in Your Favorites
Between the nostalgic flavors and modern bakery-style execution, this recipe stands tall among top-tier Recipes With Fluff. It balances comfort and decadence without trying too hard. That’s rare.
These Peanut Butter Marshmallow Brownies embody what dessert should be: bold, joyful, and just a little bit over the top.
Final Thoughts on This Legendary Treat
If brownies had a personality, these would be the charming overachiever who somehow makes everything look effortless. They bring comfort. They bring excitement. They bring people back for seconds and thirds.
So go ahead. Preheat that oven. Embrace the indulgence. And yes, lick the spatula. You earned it.
Because life’s too short for boring brownies — and these Fluffernutter Brownies are anything but boring. Print
Addictive Peanut Butter Marshmallow Brownies – A Must-Bake Favorite
- Total Time: 50 minutes
- Yield: 12 brownies 1x
Description
These irresistible layered brownies feature a rich chocolate base with a dreamy center of smooth peanut butter and fluffy marshmallow creme. Every bite delivers that perfect contrast of dense, fudgy brownie and soft, sweet filling that makes this dessert impossible to ignore.
Ingredients
- 1 ⅓ cups unsweetened cocoa powder
- 1 cup all-purpose flour
- 1 teaspoon baking powder
- ½ teaspoon kosher salt
- 1 teaspoon espresso powder
- 1 cup unsalted butter, softened
- 2 cups white sugar
- 1 cup semi-sweet chocolate chips
- 1 tablespoon vanilla extract
- 4 large eggs, at room temperature
- ¾ cup creamy peanut butter
- 1 cup marshmallow creme
Instructions
- Preheat your oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper, leaving some overhang for easy lifting.
- In a medium bowl, mix together the cocoa powder, flour, baking powder, salt, and espresso powder until well blended. Set aside.
- Place the butter and sugar in a large saucepan over medium heat. Stir as the butter melts and bring the mixture to a gentle simmer. Continue cooking for about 2 minutes until the temperature reaches approximately 230°F, stirring occasionally.
- Remove the pan from the heat. Add the chocolate chips and vanilla extract, stirring until the chocolate melts into the mixture. Let it cool for around 10 minutes.
- Beat in the eggs one at a time, mixing well after each addition until the batter looks glossy and smooth.
- Gradually fold the dry ingredients into the chocolate mixture. Stir just until combined. The batter will be thick and rich.
Assembling the Layers
- Spread half of the brownie batter evenly into the prepared baking dish.
- Gently layer the peanut butter over the top, smoothing it out as best as possible. Spoon or pipe the marshmallow creme over the peanut butter layer.
- Cover everything with the remaining brownie batter, spreading it carefully to seal the filling.
- Bake for 28 to 30 minutes, or until the top is set and a toothpick inserted comes out with a few moist crumbs.
- Let the brownies cool completely in the pan before slicing to ensure clean layers and perfect texture.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Desserts
Nutrition
- Calories: 563 kcal


