If you’ve ever found yourself caught between craving chocolate and seeking a touch of nostalgia, then these fudgy marshmallow brownies are about to sweep you off your feet. Combining rich, gooey chocolate brownies with a delightful swirl of marshmallow fluff, this easy-to-make recipe not only satisfies your sweet tooth but also transforms a simple dessert into a comforting indulgence. Whether you’re sharing them at a gathering or enjoying them solo with a glass of cold milk, they make for the ultimate treat that keeps you coming back for more. Plus, they’re perfect for baking on a whim, allowing you to brighten any day with minimal effort. Curious about how to create this slice of heaven in your kitchen? Let’s dive in!

Why are These Marshmallow Brownies Irresistible?
Decadent, each bite of these fudgy marshmallow brownies showcases a rich chocolate base paired with pillowy marshmallow fluff, making them a dessert you won’t forget. Easy to make, this recipe requires just a few ingredients and can be whipped up in no time. Perfect for sharing, they’re bound to impress at any gathering or potluck. Versatile, you can mix in your favorite chocolate chips or swap the marshmallow fluff for homemade versions. Gooey goodness, these brownies offer a nostalgic flavor reminiscent of childhood s’mores, satisfying both young and old alike. For more delightful variations, check out Apple Brownies Deliciously or 4-Ingredient Gluten Free!
Marshmallow Brownie Ingredients
• Here’s what you need to create these delightful marshmallow brownies!
For the Brownies
- White Granulated Sugar – Sweetness and structure; use less sugar or a sugar alternative for a lighter version.
- Large Eggs – Bind ingredients and add moisture; egg substitutes may work, but the texture could vary.
- Egg Yolk – Enhances moistness and richness; using an extra whole egg can substitute if the yolk is omitted.
- Unsalted Butter (melted) – Adds richness and flavor; can be replaced with coconut oil for a dairy-free alternative.
- Pure Vanilla Extract – Flavor enhancement; vanilla bean paste can be used for a more intense vanilla flavor.
- Oil (Canola or Vegetable) – Moisture and richness; you can substitute with melted coconut oil.
- All-Purpose Flour – Provides structure; gluten-free flour blends may work but check for consistency.
- Unsweetened Cocoa Powder – Essential for that chocolate flavor; Dutch process cocoa gives a deeper flavor.
- Cornstarch – Adds chewiness and fudginess; can be omitted if not available, but brownies may be denser.
- Salt – Balances sweetness and enhances flavor; can be omitted if necessary.
- Semi-Sweet Chocolate Chips – Adds chunks of chocolate for texture and flavor; dark chocolate chips can substitute for a richer taste.
For the Marshmallow Layer
- Marshmallow Fluff – Provides the signature marshmallow layer; homemade marshmallow or flavored marshmallows can be swapped for a fun twist.
Ready to bake up a storm with these indulgent marshmallow brownies? Let’s get started!
Step‑by‑Step Instructions for Fudgy Marshmallow Brownies
Step 1: Preheat and Prepare
Start by preheating your oven to 325°F (163°C). While the oven warms up, prepare a 9×9-inch baking pan by spraying it with nonstick spray, then lining the bottom with parchment paper. This will ensure your fudgy marshmallow brownies release easily after baking, allowing you to enjoy every last piece without fuss.
Step 2: Combine Dry Ingredients
In a medium-sized bowl, sift together 1 cup of all-purpose flour, 1/3 cup of unsweetened cocoa powder, 1 tablespoon of cornstarch, and a pinch of salt. This step is crucial for achieving a smooth brownie texture. Set this mixture aside, as it will soon come together with the wet ingredients for your delicious homemade brownies.
Step 3: Mix Wet Ingredients
In a larger mixing bowl, beat together 1 cup of white granulated sugar, 2 large eggs, and 1 egg yolk for about 5 minutes, until the mixture is pale and fluffy. Next, add in 1/2 cup of melted unsalted butter, 1/4 cup of oil, and 1 teaspoon of pure vanilla extract. Stir until all the wet ingredients are well combined, creating a rich base for your treats.
Step 4: Incorporate Dry Ingredients
Gradually add the dry ingredient mixture into the wet bowl, mixing on low speed to avoid flour clouds. With a spatula, gently fold in 1 cup of semi-sweet chocolate chips, allowing the rich chocolate chunks to be evenly distributed throughout the brownie batter. You should have a thick, fudgy mixture that brings the marshmallow brownies to life.
Step 5: Swirl Marshmallow Fluff
Pour the brownie batter into the prepared baking pan, spreading it evenly with a spatula. Carefully dollop about 1 cup of marshmallow fluff on top of the brownie batter. Using a knife, lightly swirl the marshmallow fluff into the batter, creating beautiful ribbons of fluff that will turn into gooey pockets in your brownies when baked.
Step 6: Bake
Place the baking pan in the preheated oven and bake for 45 to 55 minutes. Check for doneness by inserting a toothpick into the center; it should come out with a few moist crumbs, indicating that the fudgy marshmallow brownies are perfectly baked and not overcooked.
Step 7: Cool and Serve
Once baked, remove the brownies from the oven and let them cool completely in the pan on a wire rack. After they have cooled, lift the brownies from the pan using the parchment paper. Cut into squares and serve these delectable fudgy marshmallow brownies solo or alongside a glass of cold milk for a delightful dessert experience.

What to Serve with Fudgy Marshmallow Brownies
Create a delightful dessert spread that complements the rich flavors of these brownies!
- Vanilla Ice Cream: The creamy, cool texture of vanilla ice cream perfectly contrasts the warm, fudgy brownies, enhancing the overall sweetness.
- Chocolate Milkshake: Treat yourself to a decadent chocolate milkshake, which pairs beautifully, echoing the chocolatey goodness of the brownies.
- Fresh Berries: Add a burst of tartness with fresh raspberries or strawberries; their acidity balances the sweetness of the marshmallow and chocolate.
- Caramel Sauce: Drizzling warm caramel sauce over the brownies adds a rich, buttery flavor, making each bite even more indulgent.
- Coffee: A steaming cup of coffee cuts through the sweetness, enhancing the chocolate notes. Opt for a rich espresso or a velvety cappuccino.
- Whipped Cream: Light and airy whipped cream adds a soft texture that envelops the brownies, creating a heavenly dessert experience for your palate.
- Nutty Ice Cream: Consider using butter pecan or pistachio ice cream for a delightful crunch and contrast to the soft brownies.
- Chocolate-Covered Strawberries: These lavish treats bring together the best of both worlds, making for a romantic pairing with fudgy marshmallow brownies.
- Chilled Milk: Sometimes a cold glass of milk is all you need; it creates a nostalgic vibe, reminiscent of childhood snack times!
- S’mores Dip: This playful twist on a classic dessert adds to the s’mores theme, echoing the flavors in the brownies while inviting dunking action!
Expert Tips for Marshmallow Brownies
- Egg Beating: Ensure to beat your eggs until they’re pale yellow, as this step is key to achieving that coveted crackle top on your marshmallow brownies.
- Toothpick Test: Use a toothpick to check for doneness; you want it to come out with slight moistness but no gooey batter sticking to it.
- Airtight Storage: Store your brownies in an airtight container to maintain freshness for up to 5 days, ensuring they stay fudgy and delicious.
- Baking Pan Size: If you want thicker brownies, consider using an 8×8-inch pan. Doubling the recipe and using a 9×13-inch pan is perfect for larger gatherings!
- Marshmallow Variations: Don’t hesitate to experiment! Swap the marshmallow fluff for homemade or flavored marshmallows to create a unique twist on these classic marshmallow brownies.
- Chocolate Choices: For a richer flavor, you can substitute semi-sweet chocolate chips with dark chocolate chips; it elevates the chocolate experience beautifully!
Make Ahead Options
These fudgy marshmallow brownies are perfect for meal prep enthusiasts! You can mix the dry ingredients (flour, cocoa powder, cornstarch, and salt) up to 3 days in advance and store them in an airtight container to maintain freshness. Additionally, the wet ingredients can be prepared 24 hours ahead—you’ll want to keep them refrigerated until you’re ready to bake. When it’s time to enjoy your brownies, simply combine the prepped dry and wet mixtures, fold in the chocolate chips, and swirl in the marshmallow fluff before baking. By prepping ahead, you’ll save time on busy weeknights without sacrificing the deliciousness of these irresistible marshmallow brownies!
Marshmallow Brownies Variations & Substitutions
Feel free to get creative with these fudgy marshmallow brownies, and tailor them to fit your taste buds!
- Dairy-Free: Substitute melted butter with coconut oil and use dairy-free chocolate chips to enjoy a rich, creamy texture without lactose.
- Gluten-Free: Swap all-purpose flour with a gluten-free flour blend for an equally delightful, fudgy result. Just make sure the blend includes xanthan gum for best texture!
- Nutty Addition: Fold in 1/2 cup of chopped nuts like walnuts or pecans into the brownie batter before baking for an added crunch and flavor burst.
- S’mores Twist: Mix crushed graham crackers into the batter and top with mini marshmallows before baking for a unique take on this marshmallow brownie delight.
- Peanut Butter Swirl: Add a swirl of creamy or crunchy peanut butter into the brownie batter before baking. This will create a delightful combination of sweet and savory flavors.
- Minty Fresh: Incorporate a few drops of peppermint extract into your wet ingredients for a refreshing chocolate-mint flavor that pairs beautifully with the sweetness of marshmallows.
- Chili Chocolate: Elevate heat levels by adding a pinch of cayenne pepper or chili powder to the batter, which gives a surprising and delicious kick to these decadent brownies.
- Flavorful Fluff: Experiment with different flavored marshmallow treats like strawberry or chocolate for a twist on the classic marshmallow fluff, completely transforming your brownies!
With these scrumptious variations, you can reinvent your marshmallow brownies time and time again. And for more delightful dessert inspiration, check out Apple Brownies Deliciously and 4-Ingredient Gluten Free!
How to Store and Freeze Marshmallow Brownies
Room Temperature: Store in an airtight container for up to 5 days; this keeps your fudgy marshmallow brownies fresh and delightful.
Fridge: If you prefer, you can refrigerate the brownies in an airtight container for up to 7 days, which helps enhance their chewy texture.
Freezer: For longer storage, freeze the brownies wrapped tightly in plastic wrap and placed in a freezer bag for up to 30 days. Thaw overnight in the fridge before enjoying.
Reheating: To reheat, gently warm individual brownies in the microwave for about 10-15 seconds. This will revive their fudgy texture, making them as delicious as the day they were baked!

Marshmallow Brownies Recipe FAQs
What kind of sugar should I use for the best results?
I recommend using white granulated sugar as it provides the sweetness and structural integrity for the brownies. If you’re looking for a lighter option, you can use a sugar alternative like coconut sugar or even a blend of stevia and granulated sugar. Just be aware that the texture and sweetness may vary slightly!
How should I store my marshmallow brownies?
To keep these delicious marshmallow brownies fresh and fudgy, store them in an airtight container at room temperature for up to 5 days. If you decide to refrigerate them, they will maintain their delicious flavor for up to 7 days, enhancing their chewiness!
Can I freeze marshmallow brownies?
Absolutely! You can freeze these brownies for up to 30 days. Make sure to wrap them tightly in plastic wrap or place them in an airtight freezer bag. When you’re ready to enjoy, just thaw them overnight in the fridge. For a quick treat, you can microwave individual brownies for 10-15 seconds to bring back that gooey texture!
What if my brownies turn out too dry?
If your brownies come out dry, it might have been due to overbaking or too much flour. To prevent that, be sure to keep an eye on them while they bake. Remember, a toothpick inserted should come out with slight moist crumbs, not clean. If they do turn out dry, serve with a scoop of ice cream or a drizzle of chocolate sauce to bring back some moisture!
Are there any allergy considerations with this recipe?
Yes! This recipe contains eggs, dairy (butter), and gluten (flour), which can trigger allergies. If you’re making these for someone with dietary restrictions, consider using egg substitutes, dairy-free butter, and gluten-free flour blends. Always check labels for cross-contamination to ensure safety!

Fudgy Marshmallow Brownies for Your Sweet Tooth Cravings
Ingredients
Equipment
Method
- Preheat your oven to 325°F (163°C) and prepare a 9x9-inch baking pan.
- In a medium bowl, sift together flour, cocoa powder, cornstarch, and salt.
- In a larger bowl, beat sugar, eggs, and egg yolk until pale and fluffy. Add melted butter, oil, and vanilla; stir to combine.
- Gradually mix in dry ingredients, then fold in chocolate chips.
- Spread brownie batter in the baking pan and swirl in marshmallow fluff.
- Bake for 45 to 55 minutes, checking doneness with a toothpick.
- Cool completely before cutting into squares and serving.

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