Fudgy Marshmallow Peanut Butter Brownies Recipe

Decadent marshmallow peanut butter brownies combine two beloved dessert favorites into one seriously addictive treat.

Sweet and rich flavors mingle perfectly in this crowd-pleasing recipe that promises pure chocolate happiness.

Chocolate lovers understand the magnetic pull of a seriously good brownie with unexpected twists.

Unexpected marshmallow swirls create delightful pockets of gooey goodness throughout each dense, fudgy square.

Creamy peanut butter adds luxurious depth and complexity to the classic chocolate base.

Dessert enthusiasts will adore how simple ingredients transform into something truly spectacular.

Prepare for a seriously impressive dessert that disappears faster than you can slice it.

The Appeal Of Marshmallow Peanut Butter Brownies

• Simple Crowd-Pleaser: These brownies combine chocolate, peanut butter, and marshmallows – a triple threat that makes everyone at the table happy.
• Quick Kitchen Fun: With basic pantry ingredients and straightforward mixing steps, anyone can create these delicious treats without complicated techniques.
• Flexible Dessert Choice: Perfect for casual gatherings, school events, potlucks, or just satisfying your chocolate craving without requiring advanced baking skills.
• Comfort Food Classic: The rich combination of chocolate and peanut butter delivers a nostalgic flavor that feels like a warm hug, bringing smiles to friends and family.

Essential Ingredients For Marshmallow Peanut Butter Brownies

• 1 Cup Unsalted Butter: This rich, creamy base brings incredible moisture to your brownie texture.
• 4 Large Eggs: These bind your entire brownie together and create a smooth, dense consistency.
• 1 Cup All-Purpose Flour: The foundation that gives your brownies their perfect cakey structure.
• 1 Cup Unsweetened Cocoa Powder: This delivers deep, intense chocolate flavor throughout your dessert.
• 1 Cup Creamy Peanut Butter: A delicious swirl that adds nutty richness and creates beautiful marbling.
• 1 1/2 Cups Granulated Sugar, 1 Cup Packed Brown Sugar: These sweeten your brownies and contribute to a perfect chewy texture.
• 1 Teaspoon Vanilla Extract: A classic flavor enhancer that rounds out your chocolate base.
• 1/2 Teaspoon Baking Powder, 1/2 Teaspoon Salt: These help your brownies rise and balance the overall sweetness.
• 2 Cups Mini Marshmallows: A fun topping that melts into gooey pockets across your brownie surface.

What Equipment Do You Need for Marshmallow Peanut Butter Brownies

• Large Mixing Bowl: Your essential partner for combining wet ingredients smoothly and creating that rich chocolate base.
• 9×13 Inch Baking Pan: The perfect vessel for spreading your brownie batter and achieving those perfectly sized squares.
• Spatula: Your trusty tool for evenly spreading batter and ensuring every inch of the pan gets covered.
• Measuring Cups: Precise measurements are key to getting the balance of chocolate, peanut butter, and marshmallows just right.
• Measuring Spoons: Helps you nail those small but critical ingredient quantities like vanilla and salt.
• Sifter: Crucial for blending dry ingredients without lumps and creating a silky smooth brownie texture.
• Toothpick: Your doneness detective for checking when the brownies are perfectly baked.
• Whisk: Great for mixing wet ingredients until they’re beautifully incorporated.
• Sharp Knife: Ensures clean, neat cuts when portioning your warm marshmallow peanut butter brownies.

How to Make Marshmallow Peanut Butter Brownies

Kitchen Know-How For Marshmallow Peanut Butter Brownies

• Melt your butter slowly to create a super smooth base that helps every ingredient blend perfectly.
• Sift dry ingredients carefully to prevent annoying flour lumps and ensure a silky brownie texture.
• Fold your peanut butter gently to create beautiful marbled patterns that look as delicious as they taste.
• Spread marshmallows evenly across the surface so every bite gets a sweet, gooey surprise.
• Check your brownies with a toothpick to nail that perfect fudgy middle – a few moist crumbs mean brownie perfection.

Flavor Variations for Marshmallow Peanut Butter Brownies

• Almond Butter Alternative: Swap out peanut butter for smooth almond butter to create a different nutty flavor profile, keeping the same measurement of 1 cup.
• Gluten-Free Version: Replace all-purpose flour with a gluten-free flour blend and ensure your cocoa powder is certified gluten-free for those with wheat sensitivities.
• Vegan Transformation: Use coconut oil instead of butter, replace eggs with flax eggs (1 tablespoon ground flaxseed mixed with 3 tablespoons water per egg), and select vegan marshmallows for a plant-based friendly treat.
• Dark Chocolate Spin: Use dark cocoa powder instead of unsweetened cocoa to create a deeper, richer chocolate base that adds complexity to your brownie texture.

Serving Ideas For Marshmallow Peanut Butter Brownies

• Serve Chilled Slices: Refrigerate brownies for an hour before serving to set the marshmallow and create a firmer, more decadent texture that melts in your mouth.
• Pair with Cold Milk: Pour a tall glass of cold milk alongside these brownies to balance the rich chocolate and peanut butter flavors, creating a classic dessert combination.
• Garnish Simply: Sprinkle a light dusting of cocoa powder or chocolate shavings on top to add an elegant finishing touch that makes your brownies look professionally prepared.
• Store Smartly: Keep brownies in an airtight container at room temperature for 3-4 days, separating layers with parchment paper to prevent sticking and maintain their soft texture.

How To Store Marshmallow Peanut Butter Brownies

• After cooling completely, stash these decadent brownies in an airtight container at room temperature where they’ll stay fresh for 3-4 days – no refrigeration needed.
• When freezing brownies, wrap each square individually in plastic wrap, then place them in a freezer-safe container to prevent freezer burn and keep them tasting fresh for up to 2 months.
• If your kitchen runs warm, store the brownies in a cool spot away from direct sunlight to maintain their soft texture and prevent the marshmallows from getting too sticky.
• For maximum flavor preservation, separate brownie layers with parchment paper when stacking in your storage container, which stops them from sticking together and keeps each bite perfect.

Marshmallow Peanut Butter Brownies Common FAQs

Marshmallow Peanut Butter Brownies Recipe

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4.9 from 24 reviews

• Total Time: 40-45 minutes
• Yield: 12 1x

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Description

Marshmallow Peanut Butter Brownies bring pure chocolate and nutty comfort straight to your dessert plate. Gooey marshmallow swirls melt perfectly into rich chocolate, creating a treat that disappears faster than you can slice them.

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Ingredients

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Main Ingredients:

• 1 cup unsalted butter
• 4 large eggs
• 1 cup all-purpose flour
• 1 cup unsweetened cocoa powder
• 1 cup creamy peanut butter

Supporting Ingredients:

• 1 ½ cups granulated sugar
• 1 cup packed brown sugar
• 1 teaspoon vanilla extract

Finishing Ingredients:

• ½ teaspoon baking powder
• ½ teaspoon salt
• 2 cups mini marshmallows

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Instructions

1. Melt 1 cup unsalted butter in a large bowl. Mix in 1 ½ cups granulated sugar, 1 cup brown sugar, 4 large eggs, and 1 teaspoon vanilla extract until the mixture becomes silky smooth.
2. Sift 1 cup all-purpose flour, 1 cup unsweetened cocoa powder, ½ teaspoon baking powder, and ½ teaspoon salt into a separate bowl. Gently incorporate these dry ingredients into your wet mixture, stirring until completely blended.
3. Fold 1 cup creamy peanut butter into the chocolate batter, ensuring it’s thoroughly mixed and creates a marbled appearance.
4. Grease a 9×13 inch baking pan. Transfer the batter into the pan, using a spatula to spread it evenly across the surface.
5. Sprinkle 2 cups mini marshmallows across the top of the batter, distributing them uniformly.
6. Position the pan in a preheated oven at 350°F. Bake for 25-30 minutes, checking doneness by inserting a toothpick near the center – it should come out with just a few moist crumbs.
7. Remove from the oven and let the brownies rest for 10 minutes. Cut into square portions while the dessert is still warm for clean, neat slices.

Notes

• Adjust marshmallow placement for even coverage, gently pressing them slightly into the batter so they melt beautifully during baking.
• Use room temperature eggs for smoother batter and more consistent brownie texture that blends ingredients perfectly.
• Select a natural, creamy peanut butter without added sugar to control overall sweetness and maintain rich chocolate flavor.
• Check brownies early at 22-25 minutes to prevent overcooking, as they continue setting while cooling and can become dry if baked too long.

• Prep Time: 15 minutes
• Cook Time: 25-30 minutes
• Category: Brownies
• Method: Baking
• Cuisine: American

Nutrition

• Serving Size: 12
• Calories: 313 kcal
• Sugar: 26 g
• Sodium: 167 mg
• Fat: 21 g
• Saturated Fat: 7 g
• Unsaturated Fat: 13 g
• Trans Fat: 0.3 g
• Carbohydrates: 29 g
• Fiber: 3 g
• Protein: 6 g
• Cholesterol: 55 mg