Marshmallow Brownies
These marshmallow brownies are a delightful treat that combines rich chocolate flavor with the fluffy sweetness of marshmallow. Perfect for any occasion, these brownies are sure to impress your family and friends. The fudgy texture, enhanced by semi-sweet chocolate chips and swirls of marshmallow fluff, makes these brownies a standout dessert that everyone will love.
Why You’ll Love This Recipe
- Irresistible Flavor: The combination of chocolate and marshmallow creates a rich and satisfying taste that is hard to resist.
- Easy to Make: With simple ingredients and straightforward steps, you can whip up these brownies in no time.
- Perfect for Sharing: Ideal for parties, potlucks, or family gatherings, these brownies are a crowd-pleaser.
- Customizable Toppings: Feel free to add nuts or extra chocolate chips for added texture and flavor.
- Decadent Texture: The fudgy brownie base paired with the lightness of marshmallow fluff creates an irresistible contrast.
Tools and Preparation
Before diving into this delicious recipe, gather the essential tools needed to make your marshmallow brownies.
Essential Tools and Equipment
- Mixer with whisk attachment
- 9×9-inch baking pan
- Parchment paper
- Rubber spatula
- Butter knife
Importance of Each Tool
- Mixer with whisk attachment: This tool ensures that your sugar and eggs are whipped to perfection, giving the brownies a light texture.
- Baking pan: A 9×9-inch pan is perfect for achieving the ideal thickness of brownies.
- Rubber spatula: This helps in folding in chocolate chips without deflating the batter.
Ingredients
For these delicious marshmallow brownies, you’ll need the following ingredients:
For the Brownie Base
- 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)
Dry Ingredients
- 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
Mix-Ins and Topping
- 1 cup Semi-sweet chocolate chips
- 1 cup Marshmallow creme
How to Make Marshmallow Brownies
Step 1: Preheat the Oven
Preheat your oven to 325°F. Spray a 9×9-inch baking pan with nonstick spray. Line the bottom and two sides of the pan with parchment paper, then spray again.
Step 2: Prepare Dry Ingredients
In a medium bowl, sift together the flour, cocoa powder, and cornstarch. Add in the salt and set aside.
Step 3: Whip Sugar and Eggs
Using a mixer with a whisk attachment, beat together the sugar, eggs, and egg yolk on high speed for about 5 minutes until pale in color. While mixing, melt the butter in the microwave and let it cool.
Step 4: Combine Wet Ingredients
Add oil, melted butter, and vanilla extract into the egg mixture. Mix on low speed until combined. Gradually add in dry ingredients and mix on low just until combined. Finally, fold in chocolate chips using a rubber spatula.
Step 5: Add Marshmallow Fluff
Pour brownie batter into the prepared pan. Melt marshmallow fluff in the microwave for about 20-30 seconds until soft. Using a teaspoon, dollop marshmallow fluff on top of brownie batter. Lightly swirl it using a butter knife for an even distribution.
Step 6: Bake
Bake in preheated oven for 45-55 minutes. To check doneness, insert a toothpick; it should come out slightly wet but not with too much batter. If necessary, bake an additional 5 minutes.
Step 7: Cool & Serve
Remove from oven and let cool completely on a cooling rack before cutting into squares for serving.
Enjoy your deliciously fudgy marshmallow brownies, perfect for any sweet craving!
How to Serve Marshmallow Brownies
These delightful marshmallow brownies can be enjoyed in various ways. Whether you want to keep it simple or elevate the dessert, here are some serving suggestions to enhance your experience.
A La Mode
- Serve warm with a scoop of vanilla ice cream on top for a creamy contrast.
Whipped Cream Topping
- Add a generous dollop of whipped cream for extra fluffiness and richness.
Fresh Berries
- Pair with fresh strawberries or raspberries for a burst of tartness that complements the sweetness.
Chocolate Sauce Drizzle
- Drizzle warm chocolate sauce over the brownies for an indulgent touch.
Nuts and Sprinkles
- Top with chopped nuts or colorful sprinkles for added texture and visual appeal.
Coffee or Tea Pairing
- Enjoy with a cup of coffee or tea to balance the sweetness and enhance flavors.

How to Perfect Marshmallow Brownies
Achieving the perfect marshmallow brownies is easy with a few tips. Follow these suggestions for a deliciously fudgy treat every time.
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Use Quality Ingredients: Opt for high-quality cocoa powder and chocolate chips for richer flavor.
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Don’t Overmix: Mix the batter just until combined to ensure your brownies remain fudgy.
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Watch Baking Time: Keep an eye on your brownies. They’re done when slightly wet on the toothpick but not raw.
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Cool Completely: Allow the brownies to cool fully before cutting; this helps them set properly.
Best Side Dishes for Marshmallow Brownies
To make your marshmallow brownies even more enjoyable, consider pairing them with complementary side dishes. Here are some fantastic options:
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Vanilla Ice Cream: Offers a creamy contrast that enhances the brownie’s rich flavor.
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Fresh Fruit Salad: Lightens up the dessert while adding freshness and color.
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Chocolate Mousse: Provides an extra layer of chocolatey goodness that chocolate lovers will adore.
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Caramel Sauce: A sweet drizzle adds another dimension of flavor to the brownies.
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Pecan Pie Bars: The nutty flavor pairs well with the soft texture of marshmallow brownies.
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Coffee Cake: The subtle sweetness of coffee cake complements rich desserts like these brownies beautifully.
Common Mistakes to Avoid
Making marshmallow brownies can be a delightful experience, but there are common pitfalls to watch out for.
- Using the wrong cocoa powder: Always use unsweetened Dutch process cocoa powder for rich flavor. Regular cocoa powder can alter the taste and texture.
- Overmixing the batter: Mix just until combined to avoid tough brownies. This keeps them fudgy and delicious.
- Not checking for doneness: Use a toothpick to check if your brownies are done. If it comes out with wet batter, they need more time in the oven.
- Skipping the cooling stage: Allow your brownies to cool completely before cutting. This helps them set properly and makes serving easier.
- Not swirling the marshmallow fluff enough: Be gentle while swirling. Over-swirling can mix it too much, losing that beautiful marbled effect.

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
- Cut brownies into squares before freezing for easy access.
- Wrap each piece tightly in plastic wrap or foil and place them in a freezer-safe bag. They can be frozen for up to 3 months.
Reheating Marshmallow Brownies
- Oven: Preheat the oven to 350°F. Place brownies on a baking sheet and heat for about 10 minutes until warm.
- Microwave: Heat individual brownies on a microwave-safe plate for about 10-15 seconds. Be careful not to overheat.
- Stovetop: Place a brownie in a non-stick skillet over low heat, cover, and warm for about 5 minutes.
Frequently Asked Questions
If you have questions about making marshmallow brownies, you’re not alone! Here are some common inquiries.
What makes marshmallow brownies so fudgy?
The combination of melted butter, oil, and chocolate chips creates a rich texture that makes these marshmallow brownies incredibly fudgy.
Can I use different types of chocolate chips?
Absolutely! Feel free to substitute semi-sweet chocolate chips with dark or milk chocolate chips based on your preference.
How do I store leftover marshmallow brownies?
Store them in an airtight container in the refrigerator for up to 5 days or freeze them for longer storage.
Can I add nuts to my marshmallow brownies?
Yes! Chopped nuts like walnuts or pecans can enhance the texture and flavor of your marshmallow brownies.
Final Thoughts
These marshmallow brownies are irresistibly fudgy and fun, perfect for any dessert lover. Their versatility allows room for customization; you can add nuts or even different flavors of chocolate chips. Try this recipe today and enjoy a delightful treat!

Marshmallow Brownies
- Total Time: 1 hour 5 minutes
- Yield: Makes approximately 16 servings 1x
Description
Indulge in the decadence of marshmallow brownies, a delightful dessert that unites rich chocolate with fluffy marshmallow fluff. These fudgy brownies are perfect for any gathering, impressing friends and family alike with their irresistible texture and flavor. Each bite offers a heavenly contrast between the dense brownie base and the lightness of the marshmallow topping. Whether served warm with ice cream or enjoyed on their own, these marshmallow brownies will quickly become a favorite in your recipe repertoire.
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
- 1 1/2 TBSP cornstarch
- 1/2 tsp salt
- 1 cup semi-sweet chocolate chips
- 1 cup marshmallow fluff
Instructions
- Preheat your oven to 325°F and prepare a 9×9-inch baking pan by lining it with parchment paper.
- In a medium bowl, sift together flour, cocoa powder, cornstarch, and salt.
- In a mixer, beat sugar, eggs, and egg yolk until pale. Add melted butter, oil, and vanilla; mix to combine.
- Gradually add dry ingredients to the wet mixture until just combined. Fold in chocolate chips.
- Pour batter into the prepared pan and dollop marshmallow fluff on top. Lightly swirl with a knife.
- Bake for 45-55 minutes or until a toothpick comes out slightly wet but not raw.
- Cool completely before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 brownie (50g)
- Calories: 220
- Sugar: 22g
- Sodium: 70mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 40mg