Marshmallow Brownies
These Marshmallow Brownies are a delightful treat that combines the rich, fudgy texture of chocolate brownies with the sweetness of marshmallow fluff. Perfect for birthdays, potlucks, or simply as an indulgence at home, these brownies stand out with their luscious chocolate chips and gooey marshmallow topping. Their unique flavor and soft texture make them a hit with both kids and adults alike!

Why You’ll Love This Recipe
- Irresistible Flavor: The combination of chocolate and marshmallow creates a harmonious blend of sweet and rich flavors that is hard to resist.
- Easy to Make: With simple steps and common ingredients, anyone can whip up these brownies in no time.
- Perfect for Any Occasion: Whether it’s a family gathering or a cozy night in, these brownies fit right in.
- Fudgy Texture: The addition of chocolate chips makes these brownies incredibly moist and satisfying.
- Customizable Topping: Feel free to add nuts or different types of chocolate chips for a personal twist!
Tools and Preparation
Before you get started on your Marshmallow Brownies, gather your tools. Having everything ready will make the process smooth and enjoyable.
Essential Tools and Equipment
- Stand mixer or hand mixer
- 9×9-inch baking pan
- Parchment paper
- Mixing bowls
- Rubber spatula
- Whisk
Importance of Each Tool
- Stand mixer or hand mixer: This tool ensures your ingredients are perfectly combined for a light and fluffy brownie batter.
- 9×9-inch baking pan: The right pan size is essential for even baking, ensuring your brownies are cooked just right.
- Rubber spatula: Great for folding in chocolate chips without overmixing your batter, which helps maintain that fudgy texture.
Ingredients
These marshmallow brownies are super fudgy chocolate brownies 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 9×9-inch baking pan with nonstick spray. Line the bottom and two sides of the pan with parchment paper, then spray again to ensure easy removal.
Step 2: Prepare Dry Ingredients
In a medium bowl, sift together the flour, cocoa powder, cornstarch, and salt. 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 it becomes pale in color. While mixing, melt the butter in the microwave. Allow it to cool before proceeding.
Step 4: Combine Mixtures
Add oil, melted butter, and vanilla extract into the egg mixture. Mix on low until combined. Gradually add in the dry ingredients and mix on low until just combined. Gently fold in the semi-sweet chocolate chips using a rubber spatula.
Step 5: Add Marshmallow Fluff
Pour the brownie batter into your prepared pan evenly. Melt the marshmallow fluff in the microwave for about 20-30 seconds until it’s easier to spread. Use a teaspoon to dollop marshmallow fluff on top of the brownie batter. Lightly swirl it using a butter knife to create a marbled effect.
Step 6: Bake
Place your pan in the preheated oven and bake for 45-55 minutes. Check if it’s done by inserting a toothpick; it should have slight wetness but not be overly gooey. If too much batter sticks to the toothpick, bake an additional 5 minutes.
Step 7: Cool & Serve
Once baked to perfection, let your brownies cool completely on a cooling rack before cutting them into squares for serving. Enjoy every fudgy bite!
How to Serve Marshmallow Brownies
These marshmallow brownies are a delightful treat, perfect for any occasion. They can be served alone or paired with other delicious options to enhance the experience.
With Ice Cream
- Vanilla ice cream – A classic pairing that adds a creamy texture and balances the rich chocolate.
- Mint chocolate chip – For a refreshing twist, this flavor complements the fudgy brownies perfectly.
With Whipped Cream
- Fresh whipped cream – Light and fluffy, it contrasts beautifully with the dense brownie texture.
- Flavored whipped cream – Try adding vanilla or almond extract for a unique flavor boost.
With Fresh Berries
- Strawberries – The sweetness of strawberries pairs well with the richness of the marshmallow brownies.
- Raspberries – Their tartness provides a lovely contrast to the sweet flavors of the dessert.
With Caramel Sauce
- Drizzle warm caramel sauce over each brownie to add an extra layer of sweetness and gooeyness.

How to Perfect Marshmallow Brownies
To ensure your marshmallow brownies turn out perfectly every time, consider these helpful tips.
- Use quality chocolate – Opt for high-quality semi-sweet chocolate chips for richer flavor.
- Don’t overmix – Mix just until combined when adding dry ingredients to keep the brownies fudgy.
- Check doneness carefully – A toothpick should come out with slightly moist crumbs for that ideal fudgy texture.
- Let them cool completely – Cooling helps set the marshmallow fluff and makes cutting easier.
- Experiment with toppings – Add nuts or sprinkles on top before baking for extra crunch and color.
Best Side Dishes for Marshmallow Brownies
When serving marshmallow brownies, you might want some side dishes to complement their rich flavor. Here are some great options:
- Chocolate Milkshake – A thick and creamy shake that enhances the chocolate experience.
- Fruit Salad – A refreshing mix of seasonal fruits provides a light contrast.
- Peanut Butter Cup Sundae – Combine peanut butter cups with vanilla ice cream for a decadent treat.
- Coffee – A warm cup of coffee balances out the sweetness of the brownies perfectly.
- Churros – These crispy treats offer a delightful crunch alongside your soft brownies.
- Cheesecake Bites – Mini cheesecake bites bring in tangy flavors that pair well with chocolate desserts.
Common Mistakes to Avoid
When making marshmallow brownies, avoiding common mistakes can elevate your baking experience. Here are some pitfalls to watch out for:
- Skipping the Parchment Paper: Not lining your pan with parchment paper may result in brownies that stick. Always use it to ensure easy removal.
- Overmixing the Batter: Mixing too much can lead to dense brownies. Combine ingredients just until you see no dry flour for the best texture.
- Baking at the Wrong Temperature: Using an incorrect oven temperature can ruin your brownies. Always preheat your oven and check with an oven thermometer if needed.
- Using Cold Ingredients: Cold eggs or butter can affect how well they mix. Let them come to room temperature for better results.
- Not Testing for Doneness: Relying solely on baking time without testing can lead to overbaking. Use a toothpick; it should come out slightly wet for fudgy brownies.
Refrigerator Storage
- Store marshmallow brownies in an airtight container in the fridge for up to 5 days.
- Place parchment paper between layers to prevent sticking.
Freezing Marshmallow Brownies
- Wrap brownies tightly in plastic wrap and then in aluminum foil before freezing.
- They can be frozen for up to 3 months. Thaw them overnight in the refrigerator before eating.
Reheating Marshmallow Brownies
- Oven: Preheat to 350°F and warm for about 10-15 minutes, covered with foil to retain moisture.
- Microwave: Heat individual pieces on a microwave-safe plate for about 10-15 seconds or until warm.
- Stovetop: Place a brownie in a pan over low heat, covering it with a lid until warmed through.
Frequently Asked Questions
What are marshmallow brownies?
Marshmallow brownies are rich chocolate brownies topped with swirls of marshmallow fluff, creating a delicious contrast of flavors and textures.
How do I make my marshmallow brownies fudgier?
To achieve fudgier brownies, reduce the flour slightly or increase the chocolate content. Using high-quality cocoa powder also enhances flavor.
Can I substitute ingredients in marshmallow brownies?
Yes, you can substitute ingredients like using coconut oil instead of butter or adding nuts for extra crunch. Customize as you wish!
How do I store leftover marshmallow brownies?
Store them in an airtight container at room temperature or refrigerate them for up to five days for optimal freshness.
Final Thoughts
These marshmallow brownies combine fudgy chocolate goodness with delightful swirls of marshmallow fluff. Their versatility allows you to customize flavors or add toppings like nuts or sprinkles. Give this recipe a try; it’s perfect for any dessert lover!

Marshmallow Brownies
- Total Time: 1 hour 5 minutes
- Yield: Approximately 16 servings 1x
Description
Indulge in the ultimate dessert experience with these Marshmallow Brownies! These rich, fudgy chocolate brownies are swirled with sweet marshmallow fluff, creating a decadent treat that delights both kids and adults alike. Perfect for birthdays, potlucks, or cozy nights at home, these brownies are incredibly easy to make and can be customized with your favorite toppings. Serve them warm with a scoop of vanilla ice cream or enjoy them plain—either way, they are sure to satisfy your sweet tooth.
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 the oven to 325°F and prepare a 9×9-inch baking pan by spraying it with nonstick spray and lining it with parchment paper.
- In a medium bowl, sift together the flour, cocoa powder, cornstarch, and salt; set aside.
- Using a mixer, beat sugar, eggs, and egg yolk on high speed for about 5 minutes until pale. Add melted butter and oil; mix until combined.
- Gradually fold in dry ingredients until just combined. Gently mix in chocolate chips.
- Pour batter into the prepared pan and dollop marshmallow fluff on top. Swirl gently with a knife.
- Bake for 45-55 minutes or until a toothpick comes out with slight wetness.
- Allow to 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 (56g)
- Calories: 220
- Sugar: 20g
- Sodium: 150mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 33g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 40mg