When the craving for something sweet strikes, there’s nothing quite like the allure of gooey, fudgy brownies. Recently, I found myself rummaging through my pantry, seeking comfort food inspiration. That’s when the idea struck me to whip up some ultra fudgy marshmallow brownies, swirling rich chocolate batter with dreamy marshmallow fluff. Each bite bursts with a perfect blend of sweetness and decadence, making them ideal for gatherings or simply to treat yourself after a long day. Whether you’re a die-hard chocolate lover or just in need of a delightful dessert that brings joy, these brownies are a must-try. Get ready to indulge in a treat that’s not only easy to make but also supremely satisfying!
Why Are These Marshmallow Brownies Irresistible?
Ultimate Fudginess: Each brownie boasts an incredibly soft and moist texture, thanks to a luscious combination of chocolate and marshmallow.
Enticing Swirl: The gooey marshmallow fluff creates an eye-catching marbled effect, making them not only a treat for the taste buds but also a feast for the eyes!
Quick & Easy: With straightforward steps, this recipe is perfect for cooks of all levels, ensuring you spend less time in the kitchen.
Crowd-Pleaser: Whether you’re hosting friends or satisfying a chocolate craving, these brownies will be the highlight of any gathering.
Versatile Treat: Feel free to customize with nuts or different types of chocolate to put your unique spin on this classic dessert!
Marshmallow Brownies Ingredients
For the Brownie Batter
• White Granulated Sugar – Adds sweetness and moisture; can use brown sugar for a deeper flavor.
• Large Eggs – Structures the brownie and adds richness; ensure you use large eggs for best results.
• Egg Yolk – Enhances the fudginess; can omit if you only have whole eggs.
• Unsalted Butter – Provides flavor and moisture; melt before use for easier mixing.
• Pure Vanilla Extract – Adds depth and enhances flavors; use high-quality extract for best results.
• Canola or Vegetable Oil – Keeps brownies moist and adds a tender crumb; can substitute with melted coconut oil.
• All-Purpose Flour – Provides structure; gluten-free flour can be used as a substitute.
• Unsweetened Cocoa Powder (Dutch Process) – Deep chocolate flavor; not a direct substitute; plain unsweetened cocoa can be used instead.
• Cornstarch – Contributes to the fudgy texture; can be omitted, but the texture may change.
• Salt – Balances sweetness and enhances flavor; essential for a well-rounded taste.
• Semi-Sweet Chocolate Chips – Adds richness and texture to the brownies; dark chocolate chips can be used for a more intense flavor.
• Marshmallow Creme – Creates a gooey, sweet swirl; fluff can be substituted if necessary.
How to Make Marshmallow Brownies
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Preheat the oven to 325°F (163°C). Grease a 9×9-inch baking pan with nonstick spray and line the bottom with parchment paper for easy removal.
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Sift together the flour, cocoa powder, cornstarch, and salt in a medium bowl. This helps remove lumps and ensures even mixing later on—set this mixture aside.
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Beat sugar, eggs, and egg yolk in a large bowl on high for about 5 minutes until the mixture becomes pale and fluffy. This aeration is key to achieving that crackly top!
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Mix in the melted butter, oil, and vanilla extract until well combined. Carefully fold in the dry mixture until just combined—avoid over-mixing to keep the brownies tender.
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Stir in the semi-sweet chocolate chips gently using a rubber spatula for an added rich texture in your brownies.
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Pour the batter into the prepared pan and evenly spread it out. Top with dollops of marshmallow fluff, swirling it with a knife for that gorgeous marbled effect.
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Bake for 45-55 minutes. Use a toothpick to test for doneness; it should come out with a few moist crumbs. Adjust the baking time as needed based on your oven.
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Cool completely on a wire rack before slicing into squares. This step is crucial to avoid crumbling and ensures clean edges for that perfect bite.
Optional: Serve warm with a scoop of vanilla ice cream for an extra decadent treat.
Exact quantities are listed in the recipe card below.
What to Serve with Marshmallow Brownies?
Indulging in these gooey treats calls for the perfect accompaniments to elevate your dessert experience!
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Vanilla Ice Cream: A classic pairing that adds creaminess and temperature contrast, making each brownie bite even more delightful.
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Fresh Berries: Strawberries or raspberries lend a tartness that beautifully balances the sweetness of the brownies, creating a refreshing finale.
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Caramel Sauce: Drizzling warm caramel over the top enhances the fudgy chocolate flavor while adding a sumptuous layer of decadence.
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Whipped Cream: Light yet rich, whipped cream provides a velvety texture that complements the brownies’ dense, gooey qualities.
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Milk: A tall glass of cold milk is a timeless choice, helping to wash down the sweetness in the most satisfying way.
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Coffee: The slight bitterness of coffee brings out the deep chocolate notes, making this an ideal pairing for a grown-up twist.
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Chocolate Ganache: A luscious pour of chocolate ganache amplifies the chocolaty delight, creating an even more indulgent treat.
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Mint Tea: A soothing cup of mint tea offers a refreshing cleanse to the palate after each rich mouthful of brownies.
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Nutty Biscuits: Serve with crunchy almond or hazelnut cookies for a delightful texture contrast, enhancing the overall dessert platter.
Marshmallow Brownies Variations
Get ready to unleash your creativity and customize your marshmallow brownies for a delightful twist on this classic treat!
- Dairy-Free: Substitute butter with coconut oil and use dairy-free chocolate chips for a creamy yet guilt-free version.
- Gluten-Free: Swap all-purpose flour with a gluten-free flour blend to enjoy the same delectable texture without gluten.
- Nutty Indulgence: Toss in your favorite chopped nuts, like walnuts or pecans, for a delightful crunch that elevates each bite.
- Minty Fresh: Add a few drops of peppermint extract to the batter for a refreshing minty twist that pairs beautifully with chocolate.
- Caramel Drizzle: Replace the marshmallow fluff with a rich caramel sauce for an irresistibly sweet and gooey topping.
- Fruit Fusion: Incorporate fresh raspberries or chopped strawberries into the batter for a fruity burst of flavor in every decadent bite.
- Spicy Kick: Stir in a pinch of cayenne pepper or chili powder to add a surprising heat that contrasts deliciously with the sweet chocolate.
- S’mores Style: Layer crushed graham crackers and mini marshmallows on top for a s’mores-inspired brownie that will take you straight to campfire nostalgia.
Tips for the Best Marshmallow Brownies
- Perfect Mixing: Ensure you beat the eggs until pale and fluffy. This aeration is crucial for that beautiful crackly top and tender texture.
- Watch the Time: Bake precisely within the suggested range. Overbaking can lead to dry brownies, while underbaking keeps them gooey and fudgy—aim for a sticky toothpick!
- Cooling is Key: Always let the brownies cool completely before cutting. This helps them set, preventing crumbling and giving you clean, perfect squares.
- Pan Size Matters: For thicker marshmallow brownies, consider using an 8×8-inch pan or doubling the recipe for gatherings. Adjust baking time accordingly!
- Customize Wisely: Feel free to switch out the chocolate chips for a different variety, but remember that any substitutions may adjust the overall flavor profile.
How to Store and Freeze Marshmallow Brownies
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Room Temperature: Keep brownies in an airtight container at room temperature for up to 5 days to maintain their fudgy texture and flavor.
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Fridge: If you prefer chilled brownies, store them in the fridge in an airtight container for up to a week; allow them to come to room temperature before serving for best taste.
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Freezer: For longer storage, freeze brownies in a single layer, wrapped tightly in plastic wrap and then aluminum foil, for up to 30 days. Thaw in the fridge overnight before enjoying.
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Reheating: Warm individual brownies in the microwave for 10-15 seconds to soften them, enhancing the gooeyness of the marshmallow swirl for a delightful treat!
Make Ahead Options
These indulgent Marshmallow Brownies are perfect for meal prep enthusiasts! You can prepare the brownie batter up to 24 hours in advance by mixing all the dry ingredients and storing them in an airtight container in the fridge. For the best results, whisk the sugar and eggs together just before baking for optimal fluffiness. Additionally, you can swirl the marshmallow fluff into the batter and refrigerate it until you’re ready to bake—this preserves its gooey texture. When it’s time to bake, pour the mixture into the pan and pop it in the oven. With these steps, you’ll have deliciously fudgy brownies ready to enjoy whenever you crave them!
Marshmallow Brownies Recipe FAQs
What type of sugar is best for fudgy marshmallow brownies?
I recommend using white granulated sugar for sweetness and moisture, but if you’re looking for a deeper flavor, brown sugar is a lovely alternative! It provides a bit of acidity and a distinct flavor that complements the chocolate beautifully.
How should I store my marshmallow brownies, and how long do they last?
Store your brownies in an airtight container at room temperature for up to 5 days. If you need to keep them longer, feel free to refrigerate them for about a week. Just remember to let them reach room temperature before diving in for the best taste!
Can I freeze marshmallow brownies for later use?
Absolutely! To freeze these decadent treats, wrap individual brownies tightly in plastic wrap and then in aluminum foil to prevent freezer burn. They can be frozen for up to 30 days. When you’re ready to enjoy, simply thaw them in the fridge overnight.
What should I do if my brownies turn out too cakey?
If your brownies come out too cakey, check the mixing process—overmixing the batter may incorporate too much air. For next time, mix until just combined and ensure your oven doesn’t run too hot. Use a toothpick to test doneness; it should come out with a few moist crumbs, which indicates fudginess!
Is there a way to make these brownies gluten-free?
Yes! You can substitute all-purpose flour with a gluten-free blend, making these marshmallow brownies suitable for everyone to enjoy. Just be sure to check that all your other ingredients, like the chocolate chips and marshmallow creme, are also gluten-free to keep the recipe compliant.
Can I make these brownies dairy-free?
Certainly! To make your marshmallow brownies dairy-free, replace the unsalted butter with a plant-based butter or coconut oil, and use dairy-free chocolate chips. This way, everyone’s taste buds can indulge in the gooey goodness without worry!

Decadent Marshmallow Brownies That Melt in Your Mouth
Ingredients
Equipment
Method
- Preheat the oven to 325°F (163°C). Grease a 9x9-inch baking pan with nonstick spray and line the bottom with parchment paper for easy removal.
- Sift together the flour, cocoa powder, cornstarch, and salt in a medium bowl.
- Beat sugar, eggs, and egg yolk in a large bowl on high for about 5 minutes until the mixture becomes pale and fluffy.
- Mix in the melted butter, oil, and vanilla extract until well combined. Carefully fold in the dry mixture until just combined.
- Stir in the semi-sweet chocolate chips gently using a rubber spatula.
- Pour the batter into the prepared pan and evenly spread it out. Top with dollops of marshmallow fluff, swirling it with a knife.
- Bake for 45-55 minutes. Use a toothpick to test for doneness; it should come out with a few moist crumbs.
- Cool completely on a wire rack before slicing into squares.







