These marshmallow brownies are the ultimate treat for any chocolate lover! With their rich, fudgy texture and decadent marshmallow fluff swirled on top, they are perfect for birthdays, potlucks, or just a cozy night in. The combination of chocolate chips and marshmallow creates a unique flavor that is hard to resist. Not only are these brownies delicious, but they are also easy to make, making them an excellent choice for bakers of all skill levels.
Why You’ll Love This Recipe
- Easy to Make – This recipe requires simple ingredients and straightforward steps, perfect for beginners.
- Rich Flavor – The deep chocolate flavor paired with sweet marshmallow creates a delightful contrast.
- Versatile Treat – Great for any occasion, from family gatherings to dessert tables at parties.
- Perfect Texture – The fudgy consistency makes every bite melt in your mouth.
- Customizable – Feel free to add nuts or different types of chocolate chips for a personal touch.
Tools and Preparation
Before you start baking these delicious marshmallow brownies, gather your tools. Having everything ready will make the process smooth and enjoyable.
Essential Tools and Equipment
- Stand mixer or hand mixer
- Mixing bowls
- Sifter
- Rubber spatula
- 9×9-inch baking pan
- Parchment paper
- Cooling rack
Importance of Each Tool
- Stand mixer or hand mixer – Saves time and effort when beating the eggs and sugar mixture to perfection.
- Sifter – Ensures your dry ingredients are lump-free for a smooth brownie batter.
- Rubber spatula – Ideal for folding in ingredients without deflating your batter.
Ingredients
These marshmallow brownies require the following ingredients:
- 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
- 1 cup Marshmallow creme
How to Make Marshmallow Brownies
Step 1: Preheat the Oven
Preheat the oven to 325°F. Spray a 9×9-inch baking pan with nonstick baking spray. Line the bottom and two sides of the pan with parchment paper and spray again.
Step 2: Prepare Dry Ingredients
In a medium bowl, sift together the flour, cocoa powder, cornstarch, and salt. Set this mixture aside.
Step 3: Beat Sugar and Eggs
Using a mixer with a whisk attachment, beat the sugar, eggs, and egg yolk on high speed for about five minutes until pale in color. While mixing, melt the butter in the microwave and allow it to cool slightly.
Step 4: Combine Wet Ingredients
Add the oil, melted butter, and vanilla extract to the egg mixture. Mix on low speed until combined. Gradually add the dry ingredients and mix on low until just combined. Fold in the chocolate chips using a rubber spatula.
Step 5: Add Marshmallow Fluff
Pour the brownie batter into your prepared baking pan. Melt the marshmallow fluff in the microwave for about 20–30 seconds until soft. Use a teaspoon to dollop marshmallow fluff over the brownie batter. Lightly swirl it with a butter knife.
Step 6: Bake
Bake in the preheated oven for approximately 45–55 minutes. The brownies are done when you insert a toothpick into them; it should come out slightly wet but not covered in batter. If too much batter sticks to it, bake for another five minutes.
Step 7: Cool Before Serving
Allow your marshmallow brownies to cool completely on a cooling rack before cutting them into squares and serving.
Enjoy your homemade marshmallow brownies! They are sure to impress anyone who tries them.
How to Serve Marshmallow Brownies
Marshmallow brownies are a delightful treat that can be served in various ways to enhance their flavor and presentation. Here are some creative suggestions for serving these rich and fudgy brownies.
A la Mode
- Serve warm marshmallow brownies with a scoop of vanilla ice cream on top. The creamy ice cream perfectly complements the chocolatey texture.
With Fresh Berries
- Pair your brownies with fresh strawberries or raspberries. The tartness of the berries balances out the sweetness of the marshmallow fluff.
Drizzled with Caramel Sauce
- Add a drizzle of warm caramel sauce over your marshmallow brownies. This extra layer of sweetness makes for a decadent dessert.
Topped with Whipped Cream
- Garnish your brownies with a dollop of whipped cream. It adds a light and airy contrast to the dense brownie base.
Coffee or Tea Pairing
- Enjoy your marshmallow brownies alongside a cup of coffee or tea. A rich espresso brings out the chocolate flavors beautifully.
As Party Favors
- Cut the brownies into smaller squares and package them as party favors. They make delightful treats for guests to take home.

How to Perfect Marshmallow Brownies
To achieve the ultimate texture and flavor in your marshmallow brownies, follow these helpful tips.
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Use Quality Ingredients: Opt for high-quality cocoa powder and chocolate chips. This will enhance the overall taste of your brownies.
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Don’t Overmix: Mix just until combined when adding dry ingredients. Overmixing can lead to tough brownies.
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Check Baking Time: Keep an eye on your baking time; every oven is different. A toothpick should come out slightly wet for that gooey texture.
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Let Them Cool: Allow the brownies to cool completely before cutting them. This helps maintain their fudgy consistency and prevents them from falling apart.
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Store Properly: Keep leftover brownies in an airtight container at room temperature. They’ll stay moist and delicious for several days.
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Experiment with Toppings: Feel free to add nuts, chocolate chunks, or even crushed cookies on top before baking for added texture and flavor.
Best Side Dishes for Marshmallow Brownies
Marshmallow brownies are versatile enough to pair with several side dishes that enhance their enjoyment. Here are some great options to consider:
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Vanilla Ice Cream: Creamy vanilla ice cream is a classic pairing that balances the richness of the brownie.
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Fresh Fruit Salad: A light fruit salad adds freshness and complements the sweetness of marshmallow brownies.
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Chocolate Milkshake: A thick milkshake made with chocolate ice cream can create an indulgent dessert experience.
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Nutella Dip: Serve some Nutella as a dip alongside brownie bites, providing a rich chocolate boost.
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Coffee Cake: A slice of coffee cake offers a nice contrast in texture while enhancing your dessert table.
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Cheesecake Bites: Mini cheesecake bites provide a creamy contrast that pairs well with gooey brownies.
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Pecan Pie Bars: These bars add another layer of sweetness and richness, perfect for those who love desserts.
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Churros: Crispy churros dusted with sugar bring an exciting crunch alongside your fudgy treats.
Common Mistakes to Avoid
When making marshmallow brownies, it’s easy to make a few common mistakes that can affect the texture and taste. Here are some tips to help you avoid them.
- Skipping the parchment paper: Not lining your pan with parchment paper can lead to brownies that stick. Always line your pan for easy removal.
- Overmixing the batter: Mixing too much can result in tough brownies. Mix just until combined for a fudgy texture.
- Using cold ingredients: Cold eggs and butter can affect how well they mix. Ensure all ingredients are at room temperature for best results.
- Not checking baking time: Ovens vary, so it’s crucial to check your brownies a few minutes early. Use a toothpick to test for doneness.
- Ignoring cooling time: Cutting into hot brownies can lead to a messy situation. Let them cool completely before slicing.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 5 days.
- Place parchment paper between layers if stacking to prevent sticking.
Freezing Marshmallow Brownies
- Wrap each brownie individually in plastic wrap and place in a freezer bag.
- They can be frozen for up to three months without losing quality.
Reheating Marshmallow Brownies
- Oven: Preheat to 350°F, then warm for about 10 minutes until soft.
- Microwave: Heat on medium power for 15-20 seconds for gooey goodness.
- Stovetop: Place on low heat in a skillet, cover with a lid, and warm gently.
Frequently Asked Questions
Here are some frequently asked questions about marshmallow brownies that might help clarify any doubts.
Can I use different types of chocolate chips?
Yes! You can use milk chocolate or dark chocolate chips depending on your preference.
How do I make gluten-free marshmallow brownies?
Simply substitute the all-purpose flour with your favorite gluten-free flour blend.
What can I add to my marshmallow brownies?
Consider adding nuts, caramel swirls, or even crushed cookies for added texture and flavor!
Can I use homemade marshmallow fluff instead?
Absolutely! Homemade marshmallow fluff adds a delightful touch if you prefer homemade ingredients.
Final Thoughts
These marshmallow brownies are not only rich and fudgy but also incredibly versatile. They are perfect for any occasion and can be customized with your favorite additions. Try making them today, and enjoy the delightful combination of chocolate and marshmallow!
Marshmallow Brownies
- Total Time: 1 hour 5 minutes
- Yield: Approximately 16 servings 1x
Description
Marshmallow brownies are the ultimate indulgence for chocolate lovers. These fudgy delights are enriched with creamy marshmallow fluff, creating a perfect blend of rich chocolate flavor and fluffy sweetness. Ideal for any occasion—from birthdays to cozy nights in—these brownies are not only delicious but also incredibly easy to whip up. With simple ingredients and straightforward steps, they cater to bakers of all skill levels. Whether you’re serving them warm with ice cream or as a sweet gift, these marshmallow brownies are sure to impress.
Ingredients
- 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 (Dutch process)
- 1 1/2 TBSP cornstarch
- 1/2 tsp salt
- 1 cup semi-sweet chocolate chips
- 1 cup marshmallow creme
Instructions
- Preheat the oven to 325°F. Prepare a 9×9-inch baking pan with nonstick spray and parchment paper.
- In a medium bowl, sift together flour, cocoa powder, cornstarch, and salt; set aside.
- In a mixing bowl, beat sugar, eggs, and egg yolk on high speed for about five minutes until pale. Add oil, melted butter, and vanilla, mixing until combined.
- Gradually add dry ingredients into the wet mix until just combined. 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 but not covered in batter.
- Cool completely before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 square (50g)
- Calories: 210
- Sugar: 22g
- Sodium: 150mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 28g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 40mg




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