With a hint of nostalgia, I can almost hear my friends’ excited chatter as they gather around the kitchen, drawn by the irresistible aroma of baking. These Ultra Fudgy Marshmallow Brownies are my secret weapon for turning ordinary moments into sweet celebrations. Just picture sinking your teeth into a rich chocolate base, tantalizingly blended with swirls of fluffy marshmallow crème. The best part? These brownies are super easy to make, perfect for surprising your loved ones or indulging after a long day. And whether you savor them on their own or pair them with a scoop of ice cream, they’re guaranteed to be a hit. Who wouldn’t want to dive into a slice of gooey goodness? Let’s grab our ingredients and get baking!
Why Are Marshmallow Brownies a Must-Try?
Irresistible Flavor: The combination of rich chocolate and light marshmallow delivers an unforgettable taste that delights everyone.
Easy to Make: With simple ingredients and straightforward steps, you can whip these up even on a busy day!
Perfect for Sharing: Whether it’s a family gathering or a potluck, these brownies are sure to impress and satisfy any crowd.
Versatile Swirls: Feel free to customize with flavored marshmallows or different chocolate chips for a unique twist, just like in my variation ideas.
Warm and Gooey: Best served warm, they melt in your mouth, especially when paired with a scoop of ice cream or cold milk.
Get ready to indulge in a dessert that will have everyone coming back for seconds!
Marshmallow Brownie Ingredients
For the Brownie Base
• White Granulated Sugar – Sweetness and moisture ensure a deliciously fudgy texture.
• Large Eggs – Provide structure and moisture, though you can substitute with flaxseed meal for a vegan option.
• Egg Yolk – Adds richness, making each bite extra indulgent; use an additional egg for a fluffier texture if preferred.
• Unsalted Butter (melted) – Infuses flavor and rich texture; can be replaced with coconut oil if desired.
• Pure Vanilla Extract – Enhances flavor beautifully; imitation vanilla can be used but may alter the overall taste.
• Oil (Canola or Vegetable) – Adds moisture without heaviness; melted coconut oil or applesauce can work as alternatives.
• All-Purpose Flour – Provides the necessary structure for our brownies; for gluten-free options, substitute with a gluten-free flour blend.
• Unsweetened Cocoa Powder – Delivers a deep chocolate flavor; consider Dutch processed cocoa for an even richer taste.
• Cornstarch – Promotes a chewy texture; omit if you prefer a denser brownie.
• Salt – Balances sweetness and enhances flavor; an essential ingredient for a well-rounded profile.
• Semi-Sweet Chocolate Chips – Imparts delightful chocolatey bursts; feel free to switch with dark or milk chocolate variants.
For the Marshmallow Swirl
• Marshmallow Crème – Creates that signature gooey swirl; melted marshmallows can also be used as a substitute to achieve the same effect.
Now that you have everything you need, let’s bring together this delectable Marshmallow Brownie masterpiece!
Step‑by‑Step Instructions for Ultra Fudgy Marshmallow Brownies
Step 1: Preheat the Oven
Begin by preheating your oven to 325°F (160°C). While the oven heats, grab a 9×9-inch baking pan and generously coat it with nonstick spray. For an extra layer of protection, line the bottom and sides with parchment paper, allowing some overhang for easy brownie removal later. This preparation ensures your marshmallow brownies have a perfect release.
Step 2: Prepare the Dry Ingredients
In a medium mixing bowl, sift together the all-purpose flour, unsweetened cocoa powder, cornstarch, and salt. This blend not only combines the ingredients but also aerates them, leading to a lighter texture. Set this dry mixture aside, allowing the cocoa powder and flour to mingle flavors while you focus on the wet ingredients.
Step 3: Mix the Wet Ingredients
In a large bowl, use an electric mixer to beat the white granulated sugar, large eggs, and egg yolk for about 5 minutes on high speed until the mixture is pale and fluffy. This step is crucial for achieving that perfect crackle top on your marshmallow brownies. Then, add the melted butter, oil, and pure vanilla extract, mixing on low until well incorporated, creating a luscious and smooth batter.
Step 4: Combine Wet and Dry Mixtures
Gradually pour the sifted dry ingredients into the wet mixture, mixing gently on low speed. Be careful not to overmix; you want to combine them just until there are no visible streaks of flour. Next, fold in the semi-sweet chocolate chips with a spatula, ensuring even distribution throughout the brownie batter for maximum chocolatey goodness.
Step 5: Transfer Batter to Pan
Pour the rich brownie batter into the prepared baking pan, using a spatula to spread it evenly into the corners. The batter should look thick and decadent at this stage. This is the base for your ultra fudgy marshmallow brownies, setting the stage for that delightful marshmallow swirl.
Step 6: Add the Marshmallow Swirl
Dollop the marshmallow crème generously over the brownie batter, spacing it out evenly. Using a knife, gently swirl the marshmallow into the top layer of the batter. Be careful not to overmix; you want distinct ribbons of marshmallow running through the brownies for that irresistible gooey texture.
Step 7: Bake to Perfection
Place the prepared pan in the preheated oven and bake for 45 to 55 minutes. To check for doneness, insert a toothpick in the center; it should come out slightly wet with some batter clinging to it. This ensures the brownies remain wonderfully gooey and fudgy, highlighted by the luscious marshmallow swirls.
Step 8: Cool and Serve
Once baked, remove the pan from the oven and let the marshmallow brownies cool completely in the pan on a wire rack. This step is essential for easier cutting. Once cooled, use the parchment overhang to lift the brownies out and cut them into squares, ready to be enjoyed alongside a scoop of ice cream or a glass of cold milk.
What to Serve with Ultra Fudgy Marshmallow Brownies?
Indulge your senses as you create a delightful dessert spread that perfectly complements these rich and gooey treats.
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Vanilla Ice Cream: The cool, creamy texture contrasts beautifully with the fudginess of the brownies, creating a heavenly bite.
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Chocolate Sauce: A drizzle of rich chocolate sauce enhances the chocolatey goodness and adds an extra layer of luxurious flavor.
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Fresh Berries: Sweet and tangy berries like raspberries or strawberries provide a refreshing balance to the chocolate, brightening the overall experience.
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Caramel Sauce: The silky sweetness of caramel brings a luscious twist, enticing your palate with each delicious mouthful.
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Whipped Cream: Light and airy, whipped cream adds a soft touch that complements the brownies without overwhelming them.
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Milk or Chocolate Milk: A classic pairing, a glass of cold milk or rich chocolate milk helps to wash down the dessert while intensifying the flavor.
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Coffee: The bitterness of a freshly brewed cup of coffee adds depth and sophistication, enhancing the chocolate flavors in the brownies.
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Nutty Brownie Sundae: Layer brownie squares with ice cream, nuts, and sauce for an indulgent dessert that takes this classic up a notch.
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Mint Tea: The refreshing notes of mint tea serve as a palate cleanser between bites, creating a unique and uplifting combination.
Savor each delightful pairing, and let every bite of your marshmallow brownies transport you to dessert bliss!
Storage Tips for Marshmallow Brownies
Room Temperature: Store your marshmallow brownies in an airtight container for up to 5 days. This keeps them soft and fudgy, ready for your sweet cravings.
Fridge: If you prefer a chilled treat, you can refrigerate the brownies, but they may become a bit denser. Seal them tightly to prevent drying out.
Freezer: For longer storage, freeze individual squares in an airtight container for up to 30 days. Just thaw at room temperature or reheat briefly in the microwave before enjoying.
Reheating: To bring back the gooey fondness, reheat in the microwave for 10-15 seconds. Perfect for that fresh-baked taste anytime!
Make Ahead Options
These Ultra Fudgy Marshmallow Brownies are a dream for busy home cooks looking to save time! You can prepare the brownie batter (up to 24 hours in advance) and store it tightly covered in the refrigerator. Additionally, the marshmallow crème can be measured out and kept in an airtight container at room temperature. When you’re ready to bake, simply mix the batter with the marshmallow swirl as directed and pop it in the oven. This method ensures that your brownies are just as gooey and delicious as a fresh batch while allowing you to enjoy the fun of baking without the last-minute rush. Enjoy your sweet creations with minimal effort!
Marshmallow Brownies Variations
Feel free to get creative and put your own spin on these delightful marshmallow brownies!
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Vegan Option: Substitute eggs with flaxseed meal and coconut oil for a plant-based treat that everyone will love.
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Nutty Delight: Add chopped walnuts or pecans into the batter for that perfect crunch, creating a delightful contrast to the fudginess.
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Flavor Twists: Swap out marshmallow crème for flavored marshmallows, like caramel or peppermint, for a seasonal twist that’ll surprise your taste buds.
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Chocolate Mastery: Use dark chocolate or even white chocolate chips instead of semi-sweet for different flavor profiles—every bite can be a new experience!
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Salted Caramel: Drizzle some caramel sauce over the brownie batter before baking for a chewy, sweet surprise and an extra layer of decadence.
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Spiced Up: Add a pinch of cinnamon or espresso powder to the batter for an unexpected flavor kick that enhances the chocolate richness brilliantly.
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Crunchy Topping: Sprinkle crushed graham crackers on top before baking to give a s’mores-inspired flair that adds texture and ties well with the marshmallow.
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Heat It Up: For a spicy twist, mix in a bit of cayenne pepper for a surprising kick that perfectly complements the sweetness.
Each of these variations brings something unique to the table, making your baking adventures even more enjoyable. So grab your ingredients, and let’s make some memorable desserts! Don’t forget to check out my variation ideas for more inspiration!
Expert Tips for Marshmallow Brownies
Perfect Egg Beating: Be sure to beat the eggs until they are pale and fluffy; this step gives your brownies that cherished crackle top.
Avoid Overmixing: Once you add the flour mixture, mix gently to avoid overworking the batter, which can lead to less fudgy marshmallow brownies.
Check Oven Calibration: Every oven is different! Keep an eye on your bake time, as underbaking is essential for achieving that gooey, fudgy center.
Swirl Mindfully: When swirling in the marshmallow crème, do it gently to maintain ribbons of fluff; overmixing can produce a less appealing texture.
Store for Freshness: Keep your brownies in an airtight container at room temperature for up to 5 days, ensuring they stay deliciously moist and fudgy.
Marshmallow Brownies Recipe FAQs
What’s the best way to select ripe ingredients for my marshmallow brownies?
Absolutely! For the best flavors, use fresh, large eggs that are at room temperature; they will incorporate more easily into your batter. For the unsalted butter, ensure it’s fresh and softened for easy mixing. Chocolate chips should be high-quality semi-sweet or dark chocolate for rich flavor. If your cocoa powder is past its prime or has a dusty aroma, replace it to avoid affecting the taste of your brownies!
How should I store my marshmallow brownies, and how long will they last?
Very! Store your marshmallow brownies in an airtight container at room temperature for up to 5 days. Keeping them tightly sealed preserves their moist, fudgy texture. If you prefer them chilled, refrigerate but ensure they are wrapped well to avoid drying out. They can also be stored in the fridge but may lose some of their gooeyness.
Can I freeze my marshmallow brownies, and what’s the process?
Absolutely! To freeze, first cut your brownies into individual squares and place them in an airtight container, separating layers with parchment paper to prevent sticking. They can be stored in the freezer for up to 30 days. When you’re ready to enjoy them, allow the brownies to thaw at room temperature for about 15-20 minutes or pop them in the microwave for 10-15 seconds for that fresh-baked warmth.
I overbaked my brownies! What can I do to salvage them?
Oh no! If you find your marshmallow brownies are a bit too dry, don’t fret. One way to salvage them is by serving with whipped cream or vanilla ice cream—this will add moisture back as you eat. Another tip is to sprinkle a bit of milk or cream over the brownies before reheating them; this can help regain some of that gooey texture. For next time, keep an eye on baking time and test with a toothpick earlier for that perfect gooey center!
Are there any dietary considerations for these marshmallow brownies, especially for allergies?
Yes, indeed! If you have a gluten allergy, substitute the all-purpose flour with a gluten-free blend for a similar texture. For those who prefer vegan options, replace the eggs with flaxseed meal (1 tablespoon of flaxseed mixed with 2.5 tablespoons of water per egg) and use coconut oil instead of butter. Always double-check ingredient labels for any added allergens, especially in chocolate chips and marshmallow crème, to ensure they’re safe for your dietary needs.

Irresistibly Fudgy Marshmallow Brownies You’ll Crave Daily
Ingredients
Equipment
Method
- Preheat the oven to 325°F (160°C) and prepare a 9x9-inch baking pan with nonstick spray and parchment paper.
- Sift together all-purpose flour, cocoa powder, cornstarch, and salt in a medium mixing bowl.
- In a large bowl, beat sugar, eggs, and egg yolk for about 5 minutes. Add melted butter, oil, and vanilla extract.
- Gradually add the dry mixture to the wet mixture, mixing gently. Fold in chocolate chips.
- Spread the brownie batter evenly into the prepared pan.
- Dollop marshmallow crème over the batter and gently swirl it in.
- Bake in the preheated oven for 45 to 55 minutes. Check for doneness with a toothpick.
- Let cool completely in the pan on a wire rack before cutting into squares.