Marshmallow Brownies
These marshmallow brownies are a delightful treat that combines rich chocolate flavor with fluffy marshmallow goodness. Perfect for parties, family gatherings, or simply to satisfy your sweet tooth, this recipe offers a decadent twist on traditional brownies. The fudgy texture and gooey marshmallow fluff create an irresistible dessert that will have everyone coming back for more.
Why You’ll Love This Recipe
- Fudgy Texture: These brownies are incredibly moist and rich, making them the ultimate chocolate lover’s delight.
- Easy to Make: With simple steps and readily available ingredients, you’ll whip up these treats in no time.
- Versatile Treat: Perfect for any occasion – birthdays, holidays, or just an afternoon snack!
- Marshmallow Swirl: The unique addition of marshmallow fluff gives these brownies a special twist that elevates their flavor.
- Chocolate Chip Goodness: The semi-sweet chocolate chips add bursts of chocolatey flavor in every bite.
Tools and Preparation
Before you dive into making these marshmallow brownies, gather your tools. Having everything ready will make the process smooth and enjoyable.
Essential Tools and Equipment
- Mixer with whisk attachment
- 9X9-inch baking pan
- Parchment paper
- Rubber spatula
- Butter knife
- Cooling rack
Importance of Each Tool
- Mixer with whisk attachment: This tool ensures that your sugar and eggs get whipped to perfection, creating a light batter.
- Baking pan: A 9X9-inch pan is perfect for evenly baking your brownies for the best texture.
- Rubber spatula: Ideal for folding in ingredients without overmixing, which helps maintain the fudginess of the brownies.
Ingredients
These marshmallow brownies are super fudgy chocolate brownie with chocolate chips. It has marshmallow fluff swirled on top.
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)
- 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 Topping
- 1 cup Marshmallow creme
How to Make Marshmallow Brownies
Step 1: Preheat the Oven
Preheat the oven to 325°F. Spray a 9X9-inch baking pan with nonstick 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: Whisk Sugar and Eggs
Using a mixer with a whisk attachment, beat together the sugar, eggs, and egg yolk on high speed for about five minutes until it becomes pale in color. While mixing, melt the butter in the microwave and let it cool slightly.
Step 4: Combine Wet Ingredients
Add the oil, melted butter, and vanilla to the egg mixture. Mix on low speed until combined. Gradually add in your dry ingredient mixture until just combined. Fold in the semi-sweet chocolate chips using a rubber spatula.
Step 5: Add Marshmallow Fluff
Pour the brownie batter into the prepared pan. Melt the marshmallow fluff in the microwave for about 20-30 seconds until soft. Use a teaspoon to dollop marshmallow fluff on top of the brownie batter. Then use a butter knife to lightly swirl it into the batter.
Step 6: Bake
Bake for 45-55 minutes. Check if done by inserting a toothpick; it should come out slightly wet but not covered in batter. If needed, bake for an additional five minutes.
Step 7: Cool and Serve
Allow cooling completely on a cooling rack before cutting into squares and serving these delicious marshmallow brownies!
How to Serve Marshmallow Brownies
Serving marshmallow brownies is a delightful experience that can be enhanced with a few simple ideas. Whether you’re hosting a party or enjoying a cozy night in, these suggestions will elevate your dessert presentation.
With Vanilla Ice Cream
- A scoop of creamy vanilla ice cream pairs perfectly with the fudgy texture of brownies.
Drizzled with Chocolate Sauce
- Enhance the chocolate flavor by drizzling warm chocolate sauce over the top before serving.
Topped with Whipped Cream
- Light and airy whipped cream adds a nice contrast to the dense brownies, making each bite heavenly.
Sprinkled with Sea Salt
- A pinch of flaky sea salt on top will balance out the sweetness and enhance the chocolatey taste.
Served with Fresh Berries
- Fresh strawberries or raspberries add a fruity freshness that complements the rich flavors beautifully.
Enjoyed with a Cup of Coffee
- Pairing these brownies with a strong cup of coffee brings out their deep chocolate notes, making for an indulgent treat.

How to Perfect Marshmallow Brownies
Perfecting your marshmallow brownies requires attention to detail and some helpful tips. Follow these guidelines to ensure your brownies are always a hit.
- Use High-Quality Cocoa Powder: The choice of cocoa powder greatly affects flavor. Opt for Dutch process cocoa for richer brownies.
- Don’t Overmix: When combining wet and dry ingredients, mix just until incorporated. Overmixing can lead to tough brownies.
- Watch the Baking Time: Every oven is different. Start checking for doneness at 45 minutes to avoid overbaking.
- Let Them Cool Completely: Allowing the brownies to cool completely in the pan makes them easier to cut and enhances their texture.
- Experiment with Mix-Ins: Feel free to add nuts, caramel pieces, or even more chocolate chips for extra flavor and texture variations.
- Store Properly: Keep leftover brownies in an airtight container at room temperature for up to five days for best freshness.
Best Side Dishes for Marshmallow Brownies
Pairing side dishes with marshmallow brownies can create a more rounded dessert experience. Here are some delicious options:
- Fruit Salad: A refreshing mix of seasonal fruits can cleanse the palate between bites of rich brownie.
- Chocolate Fondue: Dip slices of brownie into warm chocolate fondue for an interactive dessert experience.
- Cheese Platter: A selection of cheeses offers a savory contrast that enhances the sweet flavors of the brownies.
- Frozen Yogurt: Low-fat frozen yogurt provides a lighter option that balances richness without compromising on taste.
- Caramel Sauce: Drizzling homemade caramel sauce adds an extra layer of sweetness and decadence.
- Nutty Granola: Serve crunchy granola on the side for added texture and flavor that complements soft brownies.
- Tea Selection: Offer herbal or black tea as a beverage option; its warmth enhances the overall dessert experience.
- Homemade Marshmallows: For marshmallow lovers, serving soft homemade marshmallows can bring even more joy to this treat!
Common Mistakes to Avoid
Making marshmallow brownies can be simple, but several common errors may lead to less-than-perfect results. Here are some mistakes to watch out for:
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Skipping the parchment paper: Not lining the baking pan can lead to brownies that stick. Always line your pan with parchment for easy removal.
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Overmixing the batter: Mixing too much can make your brownies tough. Mix just until combined for a fudgy texture.
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Ignoring baking time: Every oven is different. Check your brownies a few minutes before the recommended bake time to avoid overcooking.
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Using cold ingredients: Starting with cold eggs or butter can affect how well they mix. Bring all ingredients to room temperature before starting.
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Not checking for doneness: Pulling brownies out too early can result in gooey centers. Use a toothpick to test; it should come out slightly wet, not batter-covered.

Storage & Reheating Instructions
Refrigerator Storage
- Store cooled brownies in an airtight container.
- They will last up to one week in the fridge.
Freezing Marshmallow Brownies
- Cut brownies into squares and wrap each piece tightly in plastic wrap.
- Place wrapped brownies in a freezer-safe bag or container. They can be frozen for up to three months.
Reheating Marshmallow Brownies
- Oven: Preheat to 350°F and heat brownies for about 10 minutes for a warm treat.
- Microwave: Warm individual pieces for 15-20 seconds until just heated through.
- Stovetop: Place a brownie in a skillet over low heat, covering it with a lid, and warm for 5 minutes.
Frequently Asked Questions
Here are some common questions people have about making marshmallow brownies:
Can I use different types of chocolate chips?
Yes! You can substitute semi-sweet chocolate chips with dark or milk chocolate chips based on your preference.
How do I make my marshmallow brownies extra fudgy?
For extra fudginess, ensure you don’t overbake the brownies; they should be slightly underbaked for that gooey texture.
What if I don’t have marshmallow fluff?
You can make your own by whipping egg whites and sugar together or use mini marshmallows instead for a different texture.
Can I add nuts or other toppings?
Absolutely! Chopped nuts or candies can add great texture and flavor. Just fold them into the batter along with the chocolate chips.
How do I store leftover marshmallow brownies?
Keep them in an airtight container at room temperature or refrigerate them for longer shelf life.
Final Thoughts
These marshmallow brownies are not only delicious but also versatile, allowing you to customize them with various toppings and mix-ins. Whether you enjoy them straight from the oven or chilled from the fridge, they are sure to satisfy any sweet tooth. Try this recipe today and experience the joy of homemade treats!

Marshmallow Brownies
- Total Time: 1 hour 10 minutes
- Yield: Approximately 12 servings 1x
Description
Indulge in the ultimate dessert experience with these Marshmallow Brownies, where fudgy chocolate meets fluffy marshmallow goodness. This decadent treat is perfect for any occasion—be it a casual family gathering or a festive celebration. Each bite delivers an irresistible combination of rich cocoa flavor and gooey marshmallow swirls, ensuring that everyone will be reaching for seconds. With easy-to-follow instructions and simple ingredients, you’ll have a batch of these delightful brownie bars ready in no time. Elevate your dessert game by trying this scrumptious recipe today!
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 (163°C) and 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 mixer bowl, beat sugar, eggs, and egg yolk on high speed until pale (about five minutes). Add melted butter, oil, and vanilla; mix on low until combined.
- Gradually add dry ingredients until just combined. Fold in chocolate chips with a rubber spatula.
- Spread batter into the prepared pan. Melt marshmallow fluff in the microwave for 20-30 seconds; dollop on top and swirl lightly with a butter knife.
- Bake for 45-55 minutes until a toothpick comes out slightly wet but not covered in batter. Cool completely before cutting.
- Prep Time: 15 minutes
- Cook Time: 55 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 220
- Sugar: 21g
- Sodium: 90mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 31g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 35mg