Marshmallow Brownies: Gooey Bliss in Every Bite

Published by: Ava

Modified on July 9, 2025

Delicious Marshmallow Brownies

Dessert

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Prep time

Cooking time

Total time

Servings

Hey there, I’m Ava, and baking has always been my happy place. I remember one rainy Saturday when my spouse Liam and I decided to turn our kitchen into a sweet haven. Our kids, Ella and Mason, were bouncing with excitement as we planned to whip up something gooey and chocolatey.

I’d been craving something indulgent, and the idea of Marshmallow Brownies popped into my head. There’s just something magical about combining fudgy chocolate with fluffy marshmallow swirls—it’s like a warm hug in dessert form.

As we mixed the batter, Ella giggled while sneaking chocolate chips, and Mason insisted on dolloping the marshmallow fluff with a giant spoon. Liam, my ever-patient partner, handled the oven duties while I tried to keep flour off every surface.

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Marshmallow Brownies: Gooey Bliss in Every Bite


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👨‍🍳 Author: Ava
🌍 Cuisine: General
🍰 Category: Dessert

Ingredients:

01
2 cups White granulated sugar
02
3 Large eggs
03
1 Egg yplk
04
1/2 cup Unsalted butter (melted)
05
2 tsp Pure vanilla extract
06
1/2 cup Oil (canola or vegetable)
07
3/4 cup All-purpose flour
08
1 cup Unsweetened cocoa powder (Use dutch process cocoa powder)
09
1 1/2 TBSP Cornstarch
10
1/2 tsp Salt
11
1 cup Semi-sweet chocolate chips
12
1 cup Marshmallow creme

Instructions:

Step 01
Preheat the oven to 325°F. Spray a 9X9-inch baking pan with baking nonstick spray. Line the bottom and 2 sides of the pan with parchment paper and spray again.
Step 02
In a medium bowl, sift the flour, cocoa powder, and cornstarch together. Add in the salt and set aside.
Step 03
Using a mixer with a whisk attachment, beat the sugar, eggs, and egg yolk on high speed for 5 minutes. It will become pale in color. While that mixes, melt the butter in the microwave and let it cool.
Step 04
Add the oil, melted butter, and vanilla and mix on low until combined. Add in the dry ingredients and mix on low until just combined. Pour in the chocolate chips and use a rubber spatula to fold it in.
Step 05
Pour the brownie batter into the pan. Melt the marshmallow fluff in the microwave for 20-30 seconds and mix. Use a 1 teaspoon to dollop the marshmallow fluff on top of the brownie batter. Use a butter knife to very light swirl the marshmallow fluff.
Step 06
Bake for 45-55 minutes. It is done baking when you stick in a toothpick, and it is slightly wet. If a lot of batter comes out, then bake for another 5 minutes.
Step 07
Cool on a cooling rack completely before cutting into them and serving.

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The kitchen smelled like a chocolate dream, and when those brownies came out, all melty and perfect, we couldn’t wait to dig in. We paired them with cold milk, and the kids declared it the “best rainy day ever.”

That day reminded me why I love baking—it’s not just about the food, but the memories we create. These Marshmallow Brownies became our family’s go-to treat for cozy moments. I’m thrilled to share this recipe with you, hoping it brings the same joy to your home as it does to ours. Let’s get baking!

Table Of Contents

Delicious Marshmallow BrowniesDelicious Marshmallow Brownies

Why This Dish Is a Must-Try

Looking for a dessert that’s both indulgent and easy to make? Marshmallow Brownies are the perfect blend of rich chocolate and fluffy marshmallow goodness. This recipe is a crowd-pleaser, ideal for family gatherings or a sweet solo treat.

  • Fudgy Texture: These brownies are ultra-moist with a dense, chewy bite that melts in your mouth, thanks to the perfect balance of butter and chocolate.
  • Marshmallow Magic: Swirled marshmallow fluff adds a light, sticky sweetness that contrasts beautifully with the deep chocolate flavor.
  • Easy to Make: With simple ingredients and straightforward steps, this recipe is beginner-friendly yet delivers bakery-quality results.
  • Kid-Approved: The gooey texture and sweet taste make this a hit with kids and adults alike, perfect for family baking days.

Ingredients for Marshmallow Brownies

Creating delicious Marshmallow Brownies starts with quality ingredients. You likely have most of these in your pantry, making this an easy go-to dessert for any occasion.

  • 2 cups White granulated sugar
  • 3 Large eggs
  • 1 Egg yplk
  • 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
  • 1 cup Marshmallow creme

Baking Together: Step-by-Step Guide for Marshmallow Brownies

Ready to bake some irresistible Marshmallow Brownies? This step-by-step guide makes the process simple and fun, ensuring a batch of fudgy, gooey treats every time.

  1. Preheat the oven to 325°F. Spray a 9X9-inch baking pan with baking nonstick spray. Line the bottom and 2 sides of the pan with parchment paper and spray again.
  2. In a medium bowl, sift the flour, cocoa powder, and cornstarch together. Add in the salt and set aside.
  3. Using a mixer with a whisk attachment, beat the sugar, eggs, and egg yolk on high speed for 5 minutes. It will become pale in color. While that mixes, melt the butter in the microwave and let it cool.
  4. Add the oil, melted butter, and vanilla and mix on low until combined. Add in the dry ingredients and mix on low until just combined. Pour in the chocolate chips and use a rubber spatula to fold it in.
  5. Pour the brownie batter into the pan. Melt the marshmallow fluff in the microwave for 20-30 seconds and mix. Use a 1 teaspoon to dollop the marshmallow fluff on top of the brownie batter. Use a butter knife to very light swirl the marshmallow fluff.
  6. Bake for 45-55 minutes. It is done baking when you stick in a toothpick, and it is slightly wet. If a lot of batter comes out, then bake for another 5 minutes.
  7. Cool on a cooling rack completely before cutting into them and serving.

Ava’s Warm Tips from the Kitchen

Here are some tried-and-true tips to perfect your baking experience with this recipe.

  • Measuring Flour: Spoon and level your flour instead of scooping directly from the bag. This prevents compacting, which can make brownies cakey instead of fudgy.
  • Cooling Time: Let the brownies cool completely before cutting. This helps set the texture and makes for cleaner slices without crumbling.
  • Marshmallow Swirl: Use a knife or toothpick to swirl the marshmallow fluff gently into the batter for a marbled effect that looks and tastes amazing.

Tasty Twists & Sweet Substitutions for Marshmallow Brownies

Want to customize your Marshmallow Brownies? Try these variations to switch up the flavors and textures while keeping the core recipe just as delightful.

  • Nutty Addition: Fold in a half cup of chopped walnuts or pecans for a crunchy contrast to the soft, gooey brownie and marshmallow mix.
  • Chocolate Swap: Replace semisweet chocolate chips with white chocolate or dark chocolate chunks for a different flavor profile in every bite.
  • Caramel Drizzle: After baking, drizzle melted caramel over the top for an extra layer of sweetness that pairs well with the marshmallow.

What to Serve with Marshmallow Brownies During Family Time

Pairing your brownies with the right sides or drinks can elevate the experience. Here are some ideas to enjoy during family time.

  • Cold Milk: A classic pairing, cold milk balances the rich sweetness of the brownies, making each bite even more refreshing and satisfying.
  • Vanilla Ice Cream: Serve a scoop of vanilla ice cream on a warm brownie for a delightful contrast of hot and cold, creamy and fudgy.
  • Hot Cocoa: A mug of hot cocoa alongside these brownies creates the ultimate cozy treat, perfect for chilly evenings with loved ones.

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Conclusion

Marshmallow Brownies are the ultimate treat for chocolate lovers and sweet-tooth enthusiasts. Their fudgy texture and gooey marshmallow swirls make them a standout dessert for any occasion.

Why not give this recipe a try? Bake a batch today and share the joy with your family or friends. Drop a comment below to let me know how it turned out or share your own twist on this classic!

A Sweet Moment from Ava’s Kitchen

Every time I bake these brownies, I’m reminded of rainy days with Ella and Mason’s laughter filling the house. I’d love to hear your baking stories—comment below or share how this recipe sweetened your day!

Frequently Asked Questions (FAQ)

How do you dry out marshmallows in the oven?

To dry out marshmallows in the oven for recipes like Marshmallow Brownies, preheat your oven to 200°F (93°C). Place marshmallows in a single layer on a parchment-lined baking sheet. Bake for 1-2 hours, checking occasionally. They should become firm and slightly crisp on the outside while remaining soft inside. This technique enhances texture in Marshmallow Brownies, giving a chewy bite. Let them cool completely before using in your baking for best results.

Is it safe to bake marshmallows?

Yes, it is safe to bake marshmallows, provided you follow proper precautions. When making Marshmallow Brownies, marshmallows melt and become gooey at high temperatures, so ensure they are evenly distributed to avoid burning. Use an oven-safe dish and monitor closely, as they can brown quickly.

Avoid overheating, as burnt marshmallows may produce harmful compounds. Baking at moderate temperatures (around 350°F or 175°C) ensures safe, delicious results in your Marshmallow Brownies.

Can you bake marshmallows in cupcakes?

Absolutely, you can bake marshmallows in cupcakes for a delightful twist similar to Marshmallow Brownies. Add a marshmallow to the center of the batter before baking, or place mini marshmallows on top during the last few minutes of baking for a toasted effect.

Bake at 350°F (175°C) and watch closely, as they melt fast. This creates a gooey, sweet surprise in each bite, enhancing the cupcake’s texture and flavor.

What is the science behind roasting marshmallows?

Roasting marshmallows, a technique often mimicked in Marshmallow Brownies, involves complex science. When exposed to heat, the sugar in marshmallows caramelizes, creating a golden crust, while the gelatin inside softens, making it gooey. Water content turns to steam, causing slight expansion.

The Maillard reaction adds a toasty flavor. In baking Marshmallow Brownies, this process happens in the oven, transforming marshmallows into a chewy, melty layer that enhances the dessert’s richness.

Can you bake marshmallows into muffins?

Yes, you can bake marshmallows into muffins for a sweet, sticky treat akin to Marshmallow Brownies. Fold mini marshmallows into the batter or place one in the center before baking at 375°F (190°C). They’ll melt, creating a soft, gooey pocket.

Avoid overfilling, as they expand slightly. For a toasted top, add marshmallows in the last 2-3 minutes of baking. This adds a delightful texture contrast to your muffins, making them irresistible.

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