Marshmallow Brownies
These Marshmallow Brownies are the ultimate dessert for chocolate lovers. With their fudgy texture and sweet marshmallow fluff swirled on top, they’re perfect for any occasion. Whether you’re celebrating a birthday or simply craving something sweet, these brownies will impress everyone. Their rich flavor and gooey topping make them a standout treat that’s sure to satisfy your sweet tooth.

Why You’ll Love This Recipe
- Easy to Make: This recipe requires simple ingredients and straightforward steps, making it perfect for bakers of all skill levels.
- Fudgy Delight: The combination of chocolate chips and cocoa powder creates an irresistibly rich brownie base that melts in your mouth.
- Sweet Marshmallow Swirl: The addition of marshmallow fluff on top adds a delightful sweetness and unique texture that elevates these brownies.
- Versatile Treat: Enjoy them as a dessert on their own or serve with ice cream for an indulgent sundae.
- Perfect for Sharing: Cut them into squares for a crowd-pleasing treat at parties, potlucks, or family gatherings.
Tools and Preparation
Before you start baking, gather the necessary tools to make the process smooth and efficient. Having the right equipment ensures your Marshmallow Brownies turn out perfectly every time.
Essential Tools and Equipment
- 9X9-inch baking pan
- Mixer with a whisk attachment
- Rubber spatula
- Parchment paper
- Microwave-safe bowl
- Cooling rack
Importance of Each Tool
- Mixer with a whisk attachment: This tool helps achieve the fluffy texture needed by beating the eggs and sugar effectively.
- Rubber spatula: Perfect for folding in chocolate chips and ensuring you get all of the batter from the bowl without wasting any.
- Cooling rack: Allows brownies to cool evenly, preventing sogginess while ensuring they set properly.
Ingredients
These marshmallow brownies are super fudgy chocolate brownies with chocolate chips. It has marshmallow fluff swirled on top.
For the Brownies
- 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 recommended)
- 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 your 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, 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 this mixture aside for later use.
Step 3: Mix Wet Ingredients
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 to cool slightly before adding it in.
Step 4: Combine Ingredients
Add oil, melted butter, and vanilla extract to the mixture. Blend on low until combined. Gradually add in your dry ingredients until just mixed. Then fold in semi-sweet chocolate chips using a rubber spatula.
Step 5: Add Marshmallow Fluff
Pour your brownie batter into the prepared pan. In a microwave-safe bowl, melt the marshmallow fluff for about 20-30 seconds until soft. Use a teaspoon to dollop marshmallow fluff over brownie batter. Lightly swirl it with a butter knife for an even distribution.
Step 6: Bake Your Brownies
Place your baking pan in the oven and bake for about 45-55 minutes. Check doneness by inserting a toothpick; it should come out slightly wet but not coated in raw batter.
Step 7: Cool Before Serving
Allow brownies to cool completely on a cooling rack before cutting them into squares and serving.
Enjoy these delicious Marshmallow Brownies, perfect for satisfying your sweet cravings!
How to Serve Marshmallow Brownies
Serving marshmallow brownies can elevate your dessert experience. These delightful treats are perfect for sharing and can be enjoyed in various ways.
Enjoy Warm with Ice Cream
- Vanilla ice cream: A classic pairing that complements the rich chocolate flavor.
- Mint chocolate chip: Adds a refreshing twist to the fudgy brownies.
Top with Whipped Cream
- Fresh whipped cream: Lightens the dessert and adds a creamy texture.
- Flavored whipped cream: Consider chocolate or vanilla for added depth.
Pair with Fresh Fruits
- Strawberries: Their sweetness contrasts beautifully with the brownies.
- Raspberries: Adds a tartness that balances the richness of the dessert.
Create a Brownie Sundae
- Layer with ice cream, marshmallow fluff, and chocolate syrup for an indulgent treat.
Serve at Room Temperature
- Allowing brownies to cool creates a chewy texture. Enjoy them plain or with toppings!

How to Perfect Marshmallow Brownies
To achieve the best results when making marshmallow brownies, follow these helpful tips.
- Use quality ingredients: High-quality cocoa powder and chocolate chips enhance the flavor.
- Don’t overmix: Mix until just combined to maintain a fudgy texture.
- Check for doneness: Insert a toothpick; it should come out slightly wet for perfect brownies.
- Let cool completely: Cooling before cutting prevents them from falling apart.
- Experiment with flavors: Add nuts or flavored extracts for extra taste variations.
Best Side Dishes for Marshmallow Brownies
Pairing your marshmallow brownies with side dishes can create an unforgettable dessert experience. Here are some great options to consider:
- Chocolate Sauce: Drizzle over warm brownies for an extra chocolatey experience.
- Caramel Sauce: The sweet, buttery flavor pairs wonderfully with fudgy chocolate.
- Fresh Berries: Serve strawberries or raspberries on the side for a fresh contrast.
- Coffee or Espresso: A cup of coffee enhances the rich chocolate flavor beautifully.
- Milkshake: A thick shake complements the brownies’ texture and sweetness perfectly.
- Fruit Salad: A light fruit salad balances out the richness of the brownies.
Common Mistakes to Avoid
When making marshmallow brownies, it’s easy to run into a few common pitfalls. Here are some mistakes to watch out for.
- Not measuring accurately – Always use precise measurements for ingredients. This ensures your brownies come out perfectly fudgy and delicious.
- Overmixing the batter – Mixing too much can lead to tough brownies. Stir until just combined for a light texture.
- Skipping the parchment paper – Lining your pan with parchment paper helps in easy removal. Don’t skip this step!
- Baking too long – Overbaking can dry out your brownies. Check for doneness a few minutes before the recommended time.
- Using cold ingredients – Room temperature eggs and melted butter mix better into the batter, leading to a smoother texture.

Storage & Reheating Instructions
Refrigerator Storage
- Store marshmallow brownies in an airtight container.
- They can last up to one week in the fridge.
Freezing Marshmallow Brownies
- Wrap individual brownies tightly in plastic wrap.
- Place them in a freezer-safe bag or container; they can be frozen for up to three months.
Reheating Marshmallow Brownies
- Oven – Preheat to 350°F, place brownies on a baking sheet, and heat for about 10 minutes until warm.
- Microwave – Heat each brownie for 15-20 seconds until warmed through. Be careful not to overheat.
- Stovetop – Place a brownie in a skillet over low heat and cover with a lid for about 5 minutes.
Frequently Asked Questions
If you have questions about marshmallow brownies, you’re not alone! Here are some common inquiries.
How do I make my marshmallow brownies extra fudgy?
Adding an extra egg yolk or reducing the flour slightly can enhance the fudginess.
Can I use different types of chocolate?
Yes! You can mix dark chocolate or white chocolate chips into your marshmallow brownies for different flavors.
How should I store leftover marshmallow brownies?
Store them in an airtight container at room temperature or refrigerate them for longer freshness.
What if I don’t have marshmallow fluff?
You can substitute with homemade marshmallows or mini marshmallows, though the texture might differ slightly.
Can I add nuts to my marshmallow brownies?
Absolutely! Chopped nuts like walnuts or pecans add a great crunch. Just fold them into the batter before baking.
Final Thoughts
These marshmallow brownies are not only rich and fudgy but also incredibly versatile. You can customize them by adding your favorite toppings or fillings. Whether it’s nuts, caramel swirls, or even sprinkles, feel free to get creative! Give this recipe a try, and enjoy these delightful treats with family and friends!

Marshmallow Brownies
- Total Time: 1 hour 5 minutes
- Yield: Serves approximately 16 squares 1x
Description
Indulge in the ultimate chocolate experience with these Marshmallow Brownies. This delectable dessert features a rich, fudgy brownie base loaded with semi-sweet chocolate chips and topped with a luscious swirl of marshmallow fluff. Perfect for any occasion, whether you’re celebrating or simply satisfying your sweet tooth, these brownies are sure to impress everyone. Easy to make and delightful to share, they create a memorable treat that pairs wonderfully with ice cream or fresh fruit.
Ingredients
- 2 cups white granulated sugar
- 3 large eggs
- 1/2 cup unsalted butter (melted)
- 1/2 cup canola or vegetable oil
- 3/4 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1 cup semi-sweet chocolate chips
- 1 cup marshmallow creme
Instructions
- Preheat the oven to 325°F. Spray a 9X9-inch baking pan with nonstick spray and line the bottom and sides with parchment paper.
- In a medium bowl, sift together flour, cocoa powder, and cornstarch; set aside.
- In a mixer, beat sugar, eggs, and egg yolk on high speed for about 5 minutes until pale. Add melted butter, oil, and vanilla extract; blend on low.
- Gradually add dry ingredients until just mixed. Fold in chocolate chips.
- Pour brownie batter into the prepared pan. Microwave marshmallow fluff for about 20 seconds until soft; dollop over the batter and swirl gently.
- Bake for 45-55 minutes or until a toothpick comes out slightly wet.
- Let cool completely on a cooling rack before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 square (40g)
- Calories: 190
- Sugar: 22g
- Sodium: 50mg
- Fat: 8g
- Saturated Fat: 4g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 28g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 35mg