Fluffer Nutter Brownies

Slicing fluffernutter brownies into squares.

Please ignore the fact that tomorrow is Halloween and you will likely have more chocolate and sweets in the house than you’ll know what to do with.  That’s tomorrow’s problem.  Today’s problem is that you can’t open any of those candy bags for fear of depleting the trick-or-treaters spoils.  So you’ll just have to make these brownies.  Today.

Before we get into this, I’d like to thank Sally of Sally’s Baking Addiction for this all-out attack on my butt and thighs.  If you have a similar reaction,  blame Sally.

These fluffer nutter brownies are  so fudgy and dense that they almost dare you to take a second bite!  Why?  Because the first was so rich and decadent you can literally feel the sugar buzz in your brain.  That’s not an exaggeration, truly.

Sally’s recipe included  peanut butter chips.  This version does too, along with chocolate chips, chopped peanuts and marshmallows.  Lord have mercy!  

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But it’s not the add-ins that make this recipe sing.  No, it’s the cooking method.  Baked just-to-the-edge-of-done, but not-quite-to-done.  

And definitely not over-done.  Instead of a cakey texture, this straddles the line between a semi-firm ganache and bread pudding.  

My bet is that if you make these tonight, you won’t give a second thought to those bags of candy — it’s the brownies you’ll want to hoard.

Slicing into fluffernutter brownies.

More brownies and bars:

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5 from 5 votes

Fluffer Nutter Brownies

Deep, dark and fudgy with peanut butter and marshmallow –seriously decadent!
Author: Lisa Lotts
Course Dessert
Cuisine American
Keyword brownies, chocolate, marshmallows, peanut butter
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 16


  • 1 stick + 2 tablespoons unsalted butter
  • 1 cup granulated sugar
  • ¾ cup + 2 tablespoons unsweetened cocoa powder
  • ¼ teaspoon salt
  • 1 teaspoon vanilla extract
  • 2 large eggs
  • ½ cup all purpose flour
  • ½ cup + 1 tablespoon peanut butter chips
  • ½ cup + 1 tablespoon chocolate chips I used miniature chips
  • ½ cup + 1 tablespoon miniature marshmallows
  • ½ cup + 1 tablespoon salted peanuts chopped


  • Preheat oven to 325 degrees. Spray the bottom and sides of an 8″ square pan with vegetable spray. Line the the bottom of the pan with parchment paper, leaving an overhang on either side to assist in lifting the brownies from the pan. Set aside.
  • Into a large glass or other microwave safe bowl, add the butter, granulated sugar, cocoa powder and salt. Heat in the microwave in 30 second increments until the butter is melted. Stir until the mixture is completely combined. Set aside to cool while you assemble the other ingredients.
  • Stir in the vanilla extract and add the eggs, one at a time, stirring after each addition. Add the flour and stir until just combined. Add the half cup of peanut butter chips, chocolate chips, miniature marshmallows and peanuts. Fold into the batter. Pour into the baking pan and smooth the top with a spatula. Sprinkle the remaining 1 tablespoon of the chips marshmallows and peanuts on top of the brownies. Lightly press them into the batter with your fingertips.
  • Bake for 25-30 minutes and check for doneness with a cake tester or toothpick. If it comes out with just a few crumbs, the brownies are done. If you cook them too long, they’ll be more cake-y than fudgy. If the batter is still liquidy, cook for an additional 3-5 minutes.
  • Let the brownies cool to room temperature. Run a knife around the edges and gently lift them from the pan onto a cutting board. Use a long, sharp knife to cut them into squares.
  • Store in an airtight container.


Calories: 263kcal | Carbohydrates: 41g | Protein: 8g | Fat: 11g | Saturated Fat: 5g | Cholesterol: 26mg | Sodium: 113mg | Potassium: 274mg | Fiber: 5g | Sugar: 26g | Vitamin A: 50IU | Calcium: 38mg | Iron: 2.6mg

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The best fudge brownie recipe! Fluffer Nutter Brownies with peanut butter and chocolate chips, marshmallows and roasted peanuts are intensely fudgy! #brownies #fudgebrownies #peanutbutterbrownies #marshmallowbrownies #peanuts #chocolatechips #peanutbutterchips #nuttybrownies #bestfudgebrownies #chocolate #desserts #brownies #homemadebrownies #decadentbrownies

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  1. Cindy Rodriguez says:

    5 stars
    You hit the nail right on the head with these brownies- it isn’t about what’s in them its about how you make them. Brownies need that chewy center with the crunchy outside. Thank you for this delicious recipe.

  2. 5 stars
    Peanut butter, chocolate and marshmallow – YUM!

  3. 5 stars
    Chocolate and peanut butter, OMG my two favorites! I want the whole pan of these…

  4. colleen kennedy says:

    What! These are insane and I love them!! I have to try these!