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There’s a special kind of joy that comes with biting into an ultra fudgy marshmallow brownie. The first taste transports you to a world where rich chocolate meets the fluffy sweetness of marshmallow fluff, creating a delightful harmony of flavors and textures. I remember the first time I made these beauties; the kitchen was filled with the enchanting scent of melting chocolate and sugary marshmallow, awakening every sense as I eagerly awaited the first bite. Perfectly moist and positively decadent, these brownies are not just desserts; they are an experience. Whether you’re winding down after a long day, need a show-stopping treat for a gathering, or simply want to satisfy those sweet cravings, these marshmallow brownies are your answer. Join me as we whip up a batch of pure indulgence that pairs beautifully with your favorite ice cream or a tall glass of milk!

Why Choose These Marshmallow Brownies?

Indulgent flavors: These marshmallow brownies bring together rich chocolate and fluffy marshmallow for an unforgettable treat.
Easy to make: With straightforward steps, even novice bakers can whip up a batch without breaking a sweat.
Versatile options: Feel free to experiment with flavors by swapping chocolate types or adding seasonal marshmallows for a creative twist.
Perfect for sharing: Friends and family will be delighted by these fudgy bites, making them a hit at any gathering.
Ideal comfort food: Enjoy them warm with a scoop of ice cream or alongside a cup of coffee for a cozy dessert experience.

Let’s dive into this delicious recipe that will surely satisfy your sweet tooth!

Marshmallow Brownie Ingredients

For the Brownie Base
• White Granulated Sugar – Sweetens the brownies; no substitutions recommended for the best flavor.
• Large Eggs – Provide structure and moisture; use at room temperature for optimal texture.
• Egg Yolk – Adds richness and aids in achieving that ultra fudgy texture.
• Unsalted Butter – Enhances flavor; can be swapped with salted butter—just reduce the added salt.
• Pure Vanilla Extract – Infuses depth of flavor; opt for high-quality extract for the best results.
• Oil (Canola or Vegetable) – Keeps the brownies moist; coconut oil is a great substitute for a unique taste.
• All-Purpose Flour – Provides structure; can use a 1:1 gluten-free blend if desired.
• Unsweetened Cocoa Powder – Essential for rich chocolate flavor; Dutch process gives a deeper taste.
• Cornstarch – Creates a soft, chewy texture; can be omitted, but texture may vary.
• Salt – Balances sweetness, making it essential for the overall flavor.
• Semi-Sweet Chocolate Chips – Adds extra chocolatey goodness; dark chocolate is a fabulous alternative.

For the Marshmallow Topping
• Marshmallow Fluff (Creme) – Contributes sweetness and a fluffy texture; melted marshmallows work in a pinch.

How to Make Marshmallow Brownies

Preheat your oven: Start by preheating your oven to 325°F (160°C). While the oven is warming up, prepare a 9×9-inch baking pan by spraying it with nonstick spray and lining it with parchment paper for easy removal.
Combine dry ingredients: In a medium bowl, sift together the flour, cocoa powder, cornstarch, and salt. This step ensures a smooth and uniform brownie base, so set the mixture aside for later.
Beat eggs and sugar: In a separate large bowl, beat together the white granulated sugar, large eggs, and egg yolk on high speed for about 5 minutes. You want the mixture to become pale and fluffy, creating that airy texture.
Incorporate melted ingredients: Now, mix in the melted unsalted butter, oil, and pure vanilla extract on low speed. Stir until just combined; be careful not to overmix as you incorporate these rich flavors.
Add dry mixture: Gradually fold in the dry ingredients from your earlier bowl until just barely mixed. Be gentle here—overmixing can lead to dense brownies—then gently fold in the semi-sweet chocolate chips for extra chocolaty goodness.
Pour and swirl: Pour the batter into your prepared baking pan, spreading it evenly. Next, melt the marshmallow fluff in the microwave or over a double boiler. Dollop it on top of the brownie batter, using a knife to swirl it lightly for that delightful marbled effect.
Bake to perfection: Place the pan in the oven and bake for 45-55 minutes. To check for doneness, insert a toothpick—it should come out slightly wet but not covered in batter.
Cool and cut: Once baked, cool the brownies completely on a wire rack before cutting them into squares. This cooling step is crucial for achieving that fudgy texture when you take your first bite.

Optional: Serve warm with a scoop of vanilla ice cream for an irresistible treat!

Exact quantities are listed in the recipe card below.

Marshmallow Brownies Variations

Feel free to get creative with your marshmallow brownies to suit your taste preferences and dietary needs!

Gluten-Free: Substitute all-purpose flour with a 1:1 gluten-free flour blend for a gluten-free version that’s just as delicious.
Nutty: Fold in chopped nuts, like walnuts or pecans, for added crunch and an earthy flavor that complements the sweetness.
Minty Fresh: Add a few drops of peppermint extract for a refreshing twist that pairs beautifully with chocolate, especially around the holidays.
Spicy Kick: Sprinkle a pinch of cayenne pepper into the brownie batter for a surprising warmth that will awaken your taste buds.
Fruity Fusion: Mix in chopped cherries or raspberries into the brownie batter for a delightful contrast of flavors, balancing the chocolate and marshmallow.
Brownie Bites: Bake the batter in mini muffin tins for bite-sized treats that are perfectly portioned for sharing at parties!
Coconut Delight: Incorporate shredded coconut into the batter or sprinkle on top for a tropical twist that brings a new texture and flavor.
Decadent Topping: Drizzle melted chocolate or caramel over the cooled brownies for an extra indulgent treat that will impress your guests.

Let your imagination run wild and discover new favorites with each batch of marshmallow brownies!

What to Serve with Fudgy Marshmallow Brownies?

Delight your senses as you pair these scrumptiously fudgy brownies with complementary sides that bring out their rich flavors.

Vanilla Ice Cream: The cool creaminess contrasts beautifully with the warm, fudgy brownies, creating a classic dessert experience.
Fresh Berries: Bright, tangy flavors from strawberries or raspberries cut through the sweetness, offering a refreshing balance to each bite.
Espresso or Coffee: A bold cup of coffee enhances the chocolate, providing a delightful richness that elevates your dessert moment.
Whipped Cream: Light, fluffy whipped cream adds an airy element, making each bite feel like an indulgent treat fit for special occasions.
Chocolate Sauce Drizzle: For the ultimate chocolate lover, a drizzle of warm chocolate sauce intensifies those decadent flavors.
Salted Caramel: A sweet and salty pairing that adds complexity, each gooey drizzle brings out the best in the marshmallow brownies.
Nutty Topping: Chopped pecans or walnuts sprinkled on top introduces a satisfying crunch that contrasts with the chewy marshmallow topping.
Milkshake: A rich chocolate or vanilla milkshake creates a nostalgic experience; dip those brownies into the shake for extra indulgence.

Embrace the joy of dessert by creating a balanced and memorable serving experience with these delicious suggestions!

Expert Tips for Perfect Marshmallow Brownies

Beat for Fluffiness: Ensure to beat the sugar, eggs, and yolk for a full 5 minutes until pale—this step is essential for achieving a beautiful, crackled top.
Mind the Bake Time: Avoid overbaking your brownies; they should be slightly underbaked at 45-55 minutes to maintain their fudgy texture.
Adjust Pan Size: For thicker brownies, use an 8×8 pan or double the recipe in a 9×13 dish. Don’t forget to adjust baking time slightly!
Melt Marshmallows Wisely: Ensure to melt the marshmallow fluff completely before dolloping it on top; a quick zap in the microwave works wonders.
Flavor Variations: Don’t hesitate to mix things up! Substitute semi-sweet chocolate chips with dark chocolate for a richer flavor or add seasonal flavored marshmallows to create unique marshmallow brownies.

Make Ahead Options

These Marshmallow Brownies are perfect for meal prep enthusiasts! You can make the brownie batter ahead of time and refrigerate it in an airtight container for up to 24 hours. This step allows the flavors to meld beautifully while saving you time on busy days. When you’re ready to bake, simply pour the batter into the prepared pan, melt the marshmallow fluff, dollop it on top, and swirl it gently. Bake as instructed, and enjoy beautiful, fudgy brownies that are just as delicious as if you made them fresh! For longer storage, you can freeze baked brownies in an airtight container for up to 30 days.

How to Store and Freeze Marshmallow Brownies

Room Temperature: Keep brownies in an airtight container at room temperature for up to 5 days. This ensures they retain their fudgy texture and delicious flavor.

Fridge: If you prefer a firmer texture, store brownies in the fridge. They can last up to 7 days, but let them come to room temperature before enjoying for the best flavor.

Freezer: For longer storage, freeze individual squares in an airtight container or plastic wrap for up to 30 days. Thaw in the fridge overnight before indulging in these marshmallow brownies.

Reheating: Gently reheat brownies in the microwave for 10-15 seconds to restore their gooey goodness. Enjoy warm with a scoop of ice cream for a comforting treat!

Fudgy Marshmallow Brownies Recipe FAQs

What’s the best way to select ripe ingredients for the brownies?
Absolutely! Ensure your eggs are at room temperature for the best structure and moisture. When selecting cocoa powder, opt for Dutch-processed as it offers a more dynamic chocolate flavor. The butter should be unsalted and preferably fresh for optimal flavor; check for a creamy consistency without any off odors.

How should I store the marshmallow brownies?
Store your fudgy marshmallow brownies in an airtight container at room temperature for up to 5 days. If you prefer a firmer texture, refrigerate them for up to 7 days. Just remember to let them come to room temperature before indulging for the best flavor!

Can I freeze these brownies? How?
Yes, you can! I often freeze individual squares for later enjoyment. Simply wrap each square in plastic wrap, place them in an airtight container, and freeze for up to 30 days. When you’re ready to enjoy, thaw them in the fridge overnight. For a warm treat, a quick reheat in the microwave for about 10-15 seconds will revive their gooey goodness!

What should I do if my brownies are too dry?
If your brownies turn out dry, the culprit is likely overbaking. To prevent this in the future, keep an eye on the baking time, especially in the last 10 minutes, and do the toothpick test. It should come out slightly wet (not with batter) for that wonderfully fudgy texture. You can also add a little whipped cream or a scoop of ice cream to moisten each serving.

Are these brownies suitable for pets or those with allergies?
These marshmallow brownies are not suitable for pets, especially due to ingredients like chocolate and sugar, which can harm them. If you’re baking for someone with allergies, be sure to check with them first, as ingredients like eggs and butter may pose risks for certain individuals. You can also consider substituting common allergens with alternatives; for instance, use gluten-free flour for anyone with a gluten sensitivity.

How can I make these brownies more festive?
Very! You can easily switch up the flavors. Consider using seasonal flavored marshmallows, like peppermint during the holidays. Additionally, substitute with white chocolate chips or add festive sprinkles on top for a vibrant touch.