These marshmallow brownies are a delightful treat that combines fudgy chocolate brownie goodness with fluffy marshmallow swirls. Perfect for birthdays, holidays, or simply as a sweet indulgence, these brownies are sure to impress. Their rich chocolate flavor, paired with the lightness of marshmallow fluff, makes them stand out from traditional brownies. Enjoy them warm with a scoop of ice cream, or let them cool for a chewy dessert that everyone will love.

Jump to:
- Why You’ll Love This Recipe
- Tools and Preparation
- Essential Tools and Equipment
- Importance of Each Tool
- Ingredients
- For the Brownie Batter:
- For the Marshmallow Swirl:
- How to Make Marshmallow Brownies
- Step 1: Preheat the Oven
- Step 2: Prepare Dry Ingredients
- Step 3: Mix Wet Ingredients
- Step 4: Combine Wet and Dry Ingredients
- Step 5: Prepare Marshmallow Swirl
- Step 6: Bake Your Brownies
- Step 7: Cool and Serve
- How to Serve Marshmallow Brownies
- With Ice Cream
- With Fresh Berries
- As a Sundae
- With Whipped Cream
- How to Perfect Marshmallow Brownies
- Best Side Dishes for Marshmallow Brownies
- Common Mistakes to Avoid
- Storage & Reheating Instructions
- Refrigerator Storage
- Freezing Marshmallow Brownies
- Reheating Marshmallow Brownies
- Frequently Asked Questions
- What makes marshmallow brownies different?
- Can I use regular cocoa powder instead of Dutch process?
- How do I store leftover marshmallow brownies?
- Can I customize my marshmallow brownies?
- Final Thoughts
- 📖 Recipe Card
Why You’ll Love This Recipe
- Decadent Flavor: The combination of chocolate and marshmallow creates a rich and satisfying taste that’s hard to resist.
- Easy Preparation: With simple steps and common ingredients, this recipe is beginner-friendly and quick to make.
- Versatile Serving Options: Serve these brownies warm with ice cream or enjoy them chilled for a different texture experience.
- Perfect for Any Occasion: Whether it’s a casual family gathering or a fancy dinner party, these brownies are ideal for any event.
- Kid-Friendly Fun: Kids love helping out in the kitchen, and this recipe is perfect for little hands to mix and swirl.
Tools and Preparation
To make these delicious marshmallow brownies, you’ll need some essential kitchen tools. Having the right equipment can simplify the process and ensure great results.
Essential Tools and Equipment
- Mixer (stand or handheld)
- 9X9-inch baking pan
- Parchment paper
- Rubber spatula
- Whisk attachment
Importance of Each Tool
- Mixer: A good mixer saves time and ensures that your ingredients are well combined, resulting in a smooth brownie batter.
- Baking Pan: A 9X9-inch pan is the perfect size for achieving that thick brownie texture while ensuring even baking.
- Rubber Spatula: This tool is great for folding in chocolate chips and swirling the marshmallow fluff without deflating your batter.
Ingredients
These marshmallow brownies are super fudgy chocolate brownies with chocolate chips. It has marshmallow fluff swirled on top.
For the Brownie Batter:
- 2 cups White granulated sugar
- 3 Large eggs
- 1 Egg yolk
- 1/2 cup Unsalted butter (melted)
- 2 tsp Pure vanilla extract
- 1/2 cup Oil (canola or vegetable)
- 3/4 cup All-purpose flour
- 1 cup Unsweetened cocoa powder (Use Dutch-process cocoa powder)
- 1 1/2 TBSP Cornstarch
- 1/2 tsp Salt
- 1 cup Semi-sweet chocolate chips
For the Marshmallow Swirl:
- 1 cup Marshmallow creme
How to Make Marshmallow Brownies
Step 1: Preheat the Oven
Preheat your oven to 325°F (160°C). Spray your 9X9-inch baking pan with nonstick baking spray. Line the bottom and two sides of the pan with parchment paper, then spray again to prevent sticking.
Step 2: Prepare Dry Ingredients
In a medium bowl, sift together the flour, cocoa powder, cornstarch, and salt. Set aside this dry mixture as you prepare the wet ingredients.
Step 3: Mix Wet Ingredients
In another bowl, using a mixer with a whisk attachment, beat together the sugar, eggs, and egg yolk on high speed for about 5 minutes until it becomes pale in color. While mixing, melt the butter in the microwave and let it cool slightly before adding it to the mixture along with oil and vanilla. Mix on low until combined.
Step 4: Combine Wet and Dry Ingredients
Gently add your dry ingredients into the wet mixture. Mix on low until just combined; avoid overmixing. Then fold in the semi-sweet chocolate chips using a rubber spatula.
Step 5: Prepare Marshmallow Swirl
Pour your brownie batter into the prepared pan. Melt the marshmallow fluff in the microwave for about 20-30 seconds until it’s soft enough to dollop. Use a teaspoon to place small amounts of marshmallow fluff on top of the brownie batter. With a butter knife, lightly swirl to create an inviting marbled effect.
Step 6: Bake Your Brownies
Bake in your preheated oven for approximately 45-55 minutes. Check doneness by inserting a toothpick; it should come out slightly wet but not covered in batter. If needed, bake an additional five minutes.
Step 7: Cool and Serve
Once baked, remove from oven and let cool completely on a cooling rack before cutting into squares. Serve and enjoy your delightful marshmallow brownies!
How to Serve Marshmallow Brownies
Serving marshmallow brownies can elevate your dessert experience. These fudgy treats are delicious on their own but pairing them with the right accompaniments can make them even more delightful.
With Ice Cream
- Vanilla Ice Cream: The classic pairing that balances the rich chocolate flavor.
- Mint Chocolate Chip: Adds a refreshing twist to the sweet brownies.
- Caramel Swirl: Drizzling caramel sauce on top enhances the sweetness.
With Fresh Berries
- Strawberries: Their tartness cuts through the sweetness and adds a pop of color.
- Raspberries: A perfect contrast to the rich chocolate, providing a touch of acidity.
As a Sundae
- Brownie Sundae: Layer brownie pieces with ice cream, whipped cream, and nuts for an indulgent treat.
- Hot Fudge Sauce: Pouring warm fudge over the brownies creates a gooey delight.
With Whipped Cream
- Homemade Whipped Cream: Light and fluffy topping that complements the dense brownies beautifully.

How to Perfect Marshmallow Brownies
To achieve the best marshmallow brownies, consider these tips that will enhance your baking skills and improve your results.
- Use High-Quality Cocoa Powder: This ensures a richer chocolate flavor in every bite.
- Do Not Overmix the Batter: Mix just until combined to keep your brownies fudgy and moist.
- Check for Doneness Carefully: Use a toothpick; it should come out slightly wet for the perfect texture.
- Cool Completely Before Cutting: Allowing them to cool helps maintain their shape when sliced.
- Experiment with Toppings: Try adding nuts or different chocolates for extra flavor variations.
Best Side Dishes for Marshmallow Brownies
Pairing side dishes with marshmallow brownies can create a well-rounded dessert table. Here are some perfect options:
- Coffee: A hot cup of coffee pairs wonderfully with chocolate desserts, enhancing the flavors.
- Milkshake: A thick milkshake complements the rich texture of brownies, making it a fun treat.
- Fruit Salad: A light fruit salad refreshes the palate between bites of dense brownie.
- Chai Tea: The spices in chai tea add warmth that contrasts nicely with sweet flavors.
- Chocolate Mousse: For chocolate lovers, mousse provides an airy alternative to dense brownies.
- Cheesecake Bites: Small cheesecake portions offer a creamy contrast to fudgy textures.
Common Mistakes to Avoid
When making marshmallow brownies, it’s easy to make some common mistakes. Here are a few to watch out for:
- Overmixing the batter: This can lead to tough brownies. Mix just until combined for a fudgy texture.
- Not measuring ingredients accurately: Using too much or too little of an ingredient can ruin the recipe. Use precise measurements for best results.
- Skipping the parchment paper: Without it, brownies may stick to the pan. Always line your baking pan for easy removal.
- Not checking for doneness: Relying solely on bake time can be misleading. Use a toothpick to check; slightly wet means they’re done!
- Ignoring cooling time: Cutting them too soon can make a mess. Allow brownies to cool completely before slicing.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftover marshmallow brownies in an airtight container.
- They will last up to 5 days in the refrigerator.
Freezing Marshmallow Brownies
- Wrap individual brownies in plastic wrap and place them in a freezer-safe bag.
- They can be frozen for up to 3 months.
Reheating Marshmallow Brownies
- Oven: Preheat to 350°F and reheat for about 10 minutes for a fresh taste.
- Microwave: Heat each brownie for 15-20 seconds for a warm treat.
- Stovetop: Place brownies in a skillet over low heat for a few minutes until warmed through.
Frequently Asked Questions
What makes marshmallow brownies different?
Marshmallow brownies stand out due to the creamy marshmallow fluff swirled into the fudgy chocolate brownie batter, adding sweetness and texture.
Can I use regular cocoa powder instead of Dutch process?
Yes, you can use regular cocoa powder, but Dutch process cocoa provides a richer flavor and darker color, enhancing the taste of your marshmallow brownies.
How do I store leftover marshmallow brownies?
Store them in an airtight container at room temperature or refrigerate them for longer shelf life while maintaining their deliciousness.
Can I customize my marshmallow brownies?
Absolutely! You can add nuts, different types of chocolate chips, or even swirl in peanut butter along with the marshmallow fluff.
Final Thoughts
These marshmallow brownies are not only delicious but also versatile. You can customize them with various mix-ins or toppings according to your taste. Try this recipe today and enjoy every fudgy bite!
Did You Enjoy Making This Recipe? Please rate this recipe with ⭐⭐⭐⭐⭐ or leave a comment.
📖 Recipe Card
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Marshmallow Brownies
- Total Time: 1 hour 5 minutes
- Yield: About 16 servings 1x
Description
Indulge in the ultimate dessert experience with these Marshmallow Brownies, a delectable combination of rich chocolate and airy marshmallow fluff. Perfect for celebrations or a sweet treat after dinner, these fudgy brownies are not only easy to make but also customizable to suit your taste. Serve them warm with a scoop of ice cream for an extra layer of delight, or enjoy them chilled for a chewy texture that everyone will adore. Whip up this recipe for an irresistible dessert that is sure to impress family and friends alike.
Ingredients
- 2 cups white granulated sugar
- 3 large eggs
- 1/2 cup unsalted butter (melted)
- 3/4 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1 cup semi-sweet chocolate chips
- 1 cup marshmallow fluff
Instructions
- Preheat the oven to 325°F (160°C) and prepare a 9X9-inch baking pan with parchment paper.
- In one bowl, mix together the flour, cocoa powder, cornstarch, and salt. In another bowl, beat sugar, eggs, melted butter, oil, and vanilla until smooth.
- Combine wet and dry ingredients until just mixed, then fold in chocolate chips.
- Pour batter into the pan and dollop melted marshmallow fluff on top; swirl gently with a knife.
- Bake for 45-55 minutes or until a toothpick comes out slightly wet. Cool completely before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 200
- Sugar: 18g
- Sodium: 120mg
- Fat: 10g
- Saturated Fat: 6g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 26g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 40mg