Marshmallow Brownies
These marshmallow brownies are the ultimate dessert for chocolate lovers. With a rich, fudgy texture and a delightful swirl of marshmallow fluff on top, they are perfect for any occasion. Whether you’re hosting a party, celebrating a birthday, or simply indulging in a sweet treat, these brownies will impress everyone. The combination of chocolate chips and creamy marshmallow creates a unique flavor profile that is both comforting and decadent.
Why You’ll Love This Recipe
- Decadent Flavor: The blend of chocolate and marshmallow creates an irresistible taste that will satisfy your sweet tooth.
- Easy to Make: With simple ingredients and straightforward steps, you can whip up these brownies in no time.
- Perfect for Sharing: Cut into 16 squares, these brownies are great for gatherings or as gifts to friends and family.
- Versatile Treat: Enjoy them as is or serve with ice cream for an extra special dessert experience.
- Kid-Friendly Fun: Kids love the gooey marshmallow topping, making this recipe a hit for family baking days.
Tools and Preparation
To prepare your marshmallow brownies perfectly, you’ll need some essential tools. Having the right equipment makes the process smoother and more enjoyable.
Essential Tools and Equipment
- Stand mixer or hand mixer
- Mixing bowls
- Measuring cups and spoons
- Rubber spatula
- 9X9-inch baking pan
- Parchment paper
Importance of Each Tool
- Stand mixer or hand mixer: These tools make it easy to beat the eggs and sugar until light and fluffy, which is key for the brownie texture.
- Rubber spatula: This tool helps fold in chocolate chips gently without overmixing the batter, ensuring fudgy 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 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 before spraying it again.
Step 2: Prepare Dry Ingredients
In a medium bowl, sift together:
1. Flour
2. Cocoa powder
3. Cornstarch
Add in salt and set aside.
Step 3: Mix Sugar and Eggs
Using a mixer with a whisk attachment, beat together:
1. Sugar
2. Eggs
3. Egg yolk
Mix on high speed for about 5 minutes until the mixture becomes pale in color.
Step 4: Combine Wet Ingredients
While mixing, melt the butter in the microwave until just melted; allow it to cool slightly. Add:
– Oil
– Melted butter
– Vanilla extract
Mix on low until combined.
Step 5: Incorporate Dry Ingredients & Chocolate Chips
Gradually add in your dry ingredient mixture while mixing on low until just combined. Pour in:
– Chocolate chips
Use a rubber spatula to fold them into the batter gently.
Step 6: Add Marshmallow Fluff Swirl
Pour your brownie batter into the prepared baking pan evenly. In another bowl, melt:
– Marshmallow fluff
Heat it in the microwave for about 20-30 seconds until softened. Use a teaspoon to dollop it onto the brownie batter. Then use a butter knife to lightly swirl the marshmallow fluff into the batter.
Step 7: Bake Brownies
Bake your brownies for approximately 45-55 minutes. They are done when you insert a toothpick, and it comes out slightly wet but not covered in batter. If too much batter sticks to it, bake for an additional 5 minutes.
Step 8: Cool Before Serving
Allow your brownies to cool completely on a cooling rack before cutting them into squares and serving!
How to Serve Marshmallow Brownies
These marshmallow brownies are a delightful treat that can be enjoyed in various ways. Whether you prefer them warm out of the oven or chilled from the fridge, there are plenty of options to enhance your dessert experience.
Classic Warm Serving
- Serve brownies straight from the oven for a gooey texture.
- Add a scoop of vanilla ice cream on top while still warm for a delicious contrast.
Topped with Whipped Cream
- Dollop fresh whipped cream over each brownie piece.
- This adds a lightness that complements the rich chocolate flavor.
With Fresh Berries
- Pair brownies with strawberries or raspberries.
- The tartness of the berries balances the sweetness of the marshmallow brownies.
Drizzled with Chocolate Sauce
- Drizzle melted chocolate sauce over the cooled brownies.
- This extra layer of chocolate enhances their fudgy goodness.
A Sprinkle of Sea Salt
- Lightly sprinkle flaky sea salt on top before serving.
- The salt amplifies the chocolate flavor and creates an irresistible sweet-salty combination.
Served Chilled
- Refrigerate brownies for an hour before serving.
- This makes them firmer and allows flavors to meld beautifully.

How to Perfect Marshmallow Brownies
To achieve the ultimate marshmallow brownies, follow these simple tips. They will ensure your brownies turn out perfectly every time.
- Use quality ingredients: Choose high-quality cocoa powder and chocolate chips for richer flavor.
- Don’t overmix: Mix just until combined to maintain a fudgy texture; overmixing can make them cakey.
- Check doneness carefully: A toothpick should come out slightly wet; this means they are perfectly baked and fudgy.
- Cool completely before cutting: Allow brownies to cool fully on a rack for cleaner cuts and better presentation.
Best Side Dishes for Marshmallow Brownies
Marshmallow brownies pair well with various side dishes that enhance their decadent nature. Here are some delicious options to serve alongside your treats.
- Ice Cream: Vanilla or chocolate ice cream makes a classic pairing that adds creamy richness.
- Fruit Salad: A mix of seasonal fruits provides freshness and balances out the sweetness.
- Coffee: A cup of rich coffee complements the chocolate flavor beautifully, making it perfect for dessert time.
- Chocolate Milkshake: Blend milk, ice cream, and chocolate syrup for an indulgent drink to enjoy with your brownies.
- Hot Fudge Sauce: Serve warm hot fudge drizzled over the top for an extra layer of decadence.
- Caramel Sauce: A drizzle of caramel sauce adds a sweet twist that enhances the overall flavor profile.
- Chai Tea: The spices in chai tea offer a warm contrast that pairs nicely with chocolate desserts.
- Nutty Trail Mix: A small bowl of trail mix provides a crunchy texture and nutty flavor that contrasts with soft brownies.
Common Mistakes to Avoid
When making marshmallow brownies, it’s easy to run into some common pitfalls. Here are a few mistakes to watch out for.
- Skipping the parchment paper: Not lining your baking pan can result in brownies that stick. Always use parchment paper for easy removal.
- Overmixing the batter: Mixing too much can lead to tough brownies. Just mix until combined for that fudgy texture.
- Not checking oven temperature: An inaccurate oven can ruin your bake. Use an oven thermometer to ensure it’s at 325°F.
- Ignoring the cooling time: Cutting brownies too soon makes them messy. Allow them to cool fully on a rack before slicing.
- Using the wrong cocoa powder: Regular cocoa powder instead of Dutch process affects taste. Stick with Dutch process cocoa for deep flavor.

Storage & Reheating Instructions
Refrigerator Storage
- Store marshmallow brownies in an airtight container.
- They will last up to 5 days in the refrigerator.
Freezing Marshmallow Brownies
- Wrap brownies tightly in plastic wrap or foil.
- Place them in a freezer-safe container for up to 3 months.
Reheating Marshmallow Brownies
- Oven: Preheat to 350°F and heat brownies for about 10 minutes.
- Microwave: Warm individual portions for about 10-15 seconds until soft.
- Stovetop: Use a skillet over low heat, covering with a lid for a few minutes.
Frequently Asked Questions
What are Marshmallow Brownies?
Marshmallow brownies are rich, fudgy chocolate brownies topped with swirled marshmallow fluff. They offer a delightful blend of textures and flavors.
How do I make marshmallow fluff from scratch?
You can make marshmallow fluff by beating egg whites and sugar until fluffy. For ease, store-bought fluff works perfectly in this recipe.
Can I add nuts to my Marshmallow Brownies?
Absolutely! Chopped nuts like walnuts or pecans can enhance the flavor and crunch of your brownies.
How do I know when my Marshmallow Brownies are done?
Your brownies are done when a toothpick inserted comes out slightly wet but not gooey. Bake longer if necessary.
Final Thoughts
These marshmallow brownies are irresistibly fudgy and perfect for any occasion. With their delightful combination of chocolate and marshmallows, they’re sure to satisfy your sweet cravings. Feel free to customize them by adding nuts or different chocolate chips!

Marshmallow Brownies
- Total Time: 1 hour 10 minutes
- Yield: Serves approximately 16 squares 1x
Description
Indulge in the ultimate dessert with these Marshmallow Brownies, a heavenly combination of rich, fudgy chocolate and fluffy marshmallow fluff. Perfect for any occasion, from birthday parties to cozy family gatherings, these brownies are sure to impress. Their decadent texture and delightful swirl of marshmallow create a unique flavor experience that satisfies every sweet tooth. With just a few simple ingredients, you can whip up this irresistible treat that’s perfect for sharing or enjoying solo. Pair them with ice cream or fresh berries for an extra special touch.
Ingredients
- 2 cups white granulated sugar
- 3 large eggs
- 1 egg yolk
- 1/2 cup unsalted butter (melted)
- 1/2 cup oil (canola or vegetable)
- 3/4 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1 cup semi-sweet chocolate chips
- 1 cup marshmallow fluff
Instructions
- Preheat your oven to 325°F. Prepare a 9X9-inch baking pan with nonstick spray and parchment paper.
- In a bowl, sift together flour, cocoa powder, cornstarch, and salt. Set aside.
- In a mixer, beat sugar, eggs, and egg yolk until pale and fluffy.
- Mix in melted butter, oil, and vanilla extract until combined.
- Gradually add dry ingredients while mixing on low, then fold in chocolate chips.
- Pour the batter into the prepared pan. Melt marshmallow fluff and dollop it onto the batter; swirl it gently with a knife.
- Bake for 45-55 minutes or until a toothpick comes out slightly wet but not gooey.
- Let cool completely before cutting into squares.
- Prep Time: 15 minutes
- Cook Time: 55 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 square (45g)
- Calories: 210
- Sugar: 24g
- Sodium: 108mg
- Fat: 10g
- Saturated Fat: 6g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 31g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 38mg