Delish Fluffernutter Brownies

If you’re the sort of person who believes peanut butter and marshmallow were put on earth to be shoved into chocolate’s arms, hi — we’re related. Delish Fluffernutter Brownies are exactly that love triangle: fudgy brownie base, generous peanut-butter ribbons, and a sticky, glorious marshmallow top that refuses to behave at family dinners. It’s special because it’s dessert nostalgia with better textures and zero shame; it solves the eternal “brownie or fluffernutter?” debate by loudly choosing both. Try it if you like things that are a little messy, mostly irresistible, and perfect for pretending you meant to make something that complicated.

Once, I confidently brought these to a neighborhood potluck and told my husband to “just keep an eye on them” in the kitchen while I signed people in. He mistook “keep an eye” for “bore a tunnel through the marshmallow with a fork,” then proudly offered the resulting Franken-brownie to our neighbor as a “new rustic take.” The kids, meanwhile, staged a coup by trading the last square for permission to host a YouTube livestream of our cat doing absolutely nothing. I lost the brownie, my dignity, and a minor feud about whether marshmallow counts as a topping or a food group. We all survived, and the neighbor begged for the recipe — so apparently chaos = success.

Time-Saving Hacks

– Use store-bought marshmallow creme because time is a precious internet comment you’ll never read.
– Make the brownie batter in one bowl — yes, it’s messy but fewer dishes = instant adulting bonus.
– Bake in a slightly larger pan to speed up cooking time; edges will be extra crispy which is not a complaint.

Serving Ideas

– Pair with a tall glass of milk for the kids and a suspiciously large pour of bourbon for adults. (Clearly label which is which.)
– Serve with vanilla ice cream if you want to pretend calories don’t apply.
– Bring to a bake sale and watch people barter their first-born for a square. That’s an exaggeration—probably.

What to Serve It With

– Coffee or espresso: cuts through the sugar like a tiny, caffeinated superhero.
– Salted pretzels or potato chips on the side for textural contrast and justified snacking.
– Fresh berries if you need to tell yourself there’s fruit in the room.

✔Tips & Mistakes

– Pro tip: Use a pan that fits your oven and your ego. Too small and the batter will sulk and overflow.
– Don’t overmix the brownie batter or you’ll get cakey vibes; we want fudgy, not “I discovered my inner muffin.”
– Marshmallow gets melty and then dramatic — let it cool a bit before slicing, unless you like a sticky stampede on your cutting board.

✔Storage Tips

Store it in the fridge… if there’s any left. Cold midnight leftovers? Sometimes better than fresh.
Quick note: Keep it in an airtight container or tightly wrapped so it doesn’t adopt every fridge scent, including the mysterious garlic fate.

✔Variations and Substitutions

Swap whatever you want—sugar ↔ honey, soy sauce ↔ tamari, or skip steps and call it “deconstructed.” It still counts.
– Swap peanut butter for almond or sunflower butter if allergies exist or you’re feeling fancy.
– Toss in chocolate chips, chopped peanuts, or a drizzle of salted caramel if you’re not a minimalist.

Delish Fluffernutter Brownies

A rich and gooey brownie recipe with the perfect fluffernutter twist.

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Prep Time: 20 minutes minutes

Cook Time: 30 minutes minutes

Total Time: 50 minutes minutes

Servings: 12

Calories: 120kcal

Ingredients

 

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Main Ingredients

• ▢ 1 cup unsalted butter melted
• ▢ 1 cup granulated sugar
• ▢ 0.5 cup brown sugar packed
• ▢ 3 large eggs
• ▢ 1 cup all-purpose flour
• ▢ 0.75 cup unsweetened cocoa powder
• ▢ 0.5 cup peanut butter creamy
• ▢ 1 cup mini marshmallows

Instructions

Preparation Steps

• Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
• In a large bowl, mix melted butter, granulated sugar, and brown sugar until well combined.
• Add the eggs one at a time, mixing well after each addition.
• Sift together flour and cocoa powder, then fold into the wet ingredients until just combined.
• Spread half of the brownie batter into the prepared baking pan.
• Dollop spoonfuls of peanut butter over the batter and swirl lightly.
• Add the mini marshmallows evenly over the peanut butter layer and then pour the remaining batter on top.
• Bake for 30 minutes or until a toothpick comes out clean.
• Let cool before cutting into squares and serving.

Notes

For an extra touch, drizzle some melted chocolate on top before serving.