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Decadent Marshmallow Dream Brownies

8 min read

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Indulge in Ultimate Comfort: Sheet Pan Marshmallow Brownies Perfect for Any Crowd

Gooey marshmallow brownies baked in a sheet pan, ready to serve a large gathering.

Some recipes are more than just a collection of ingredients and instructions; they are a gateway to cherished memories, a warm embrace of nostalgia. This homemade marshmallow brownie recipe holds that special power for me. It instantly transports me back to lively Christmas gatherings at my husband’s childhood home, a vibrant scene filled with seven siblings, their children running and laughing, the competitive clatter of board games, rosy-cheeked sledders returning from the snowy hill, and the comforting crackle of a wood stove. In the heart of it all, the women of the family would gather in the kitchen, their laughter mingling with the sounds of cooking, orchestrating a feast for our wonderfully large, boisterous crowd. These aren’t just brownies; they’re a slice of heartwarming tradition, a taste of togetherness that lingers long after the last crumb is gone.

The beauty of this particular brownie recipe lies in its ability to effortlessly cater to a large group without compromising on flavor or quality. Baked in a generous sheet pan, these brownies are designed for sharing, making them an ideal dessert for family reunions, holiday parties, potlucks, or any occasion where deliciousness needs to go a long way. Beyond their crowd-pleasing capacity, they are remarkably simple to prepare, ensuring that even busy hosts can whip up a batch with ease. And trust me, they are so incredibly delicious, so utterly irresistible, that you’ll likely catch guests (and family members!) sneaking back into the kitchen, hoping to snag the very last piece. The rich, moist, and intensely chocolatey brownie base provides the perfect foundation, topped with a luscious layer of melted, gooey marshmallows, and crowned with a decadent, buttery chocolate frosting. Each bite is a symphony of textures and flavors – a testament to simple ingredients coming together to create something truly extraordinary. It’s a treasured favorite in our household, and I have no doubt it will quickly become a beloved staple in yours too.

Close-up of a homemade brownie showing its rich, moist texture before toppings are added.

Crafting the Perfect Brownie Base: Richness and Simplicity in Every Bite

The foundation of these outstanding marshmallow brownies is a deeply chocolatey and wonderfully moist brownie layer. Achieving this perfect balance is simpler than you might think. We start with readily available ingredients that, when combined correctly, create a rich, fudge-like consistency that’s neither too cakey nor too dense. The use of quality cocoa powder is key here, infusing the brownies with that unmistakable deep chocolate flavor that satisfies every craving. The sheet pan format ensures an even bake, producing a consistent texture across the entire batch, meaning every square is as perfect as the last. This recipe truly takes the guesswork out of baking brownies, allowing you to focus on the joy of creating a delicious treat.

Homemade brownies with cocoa powder, marshmallows, and chocolate frosting, ready to be sliced.

The Irresistible Gooey Marshmallow Layer

What elevates these from classic brownies to truly exceptional marshmallow brownies is, of course, the fluffy, melted marshmallow topping. Just when the brownies are perfectly baked, a generous sprinkle of miniature marshmallows is added, returning to the oven for a mere few minutes. This brief re-bake transforms the marshmallows into a gloriously sticky, golden-brown blanket that adds an incredible chewiness and a delightful sugary sweetness to the brownies. This layer isn’t just for show; it’s an integral part of the experience, offering a contrasting texture to the dense brownie and a playful, nostalgic element that everyone adores. The subtle toasting of the marshmallows brings out an even richer flavor, complementing the chocolate perfectly.

Two Decadent Frosting Choices for Your Marshmallow Brownies

To crown these already magnificent marshmallow brownies, I’ve provided two equally delicious frosting options, allowing you to choose based on your preference or what you have on hand. Both are fantastic, ensuring a truly indulgent finish.

Frosting Option 1: Silky Chocolate Ganache

If you have heavy cream available and a little extra time, I wholeheartedly recommend the chocolate ganache topping. This frosting is a true indulgence – rich, incredibly silky smooth, and profoundly decadent. It’s made by gently warming heavy cream and then stirring in chocolate chips until they melt into a glossy, luxurious mixture. The real magic happens after it cools and is whipped; it transforms into a light, airy, yet incredibly stable frosting that pipes beautifully and spreads like a dream. The deep chocolate flavor of the ganache perfectly complements the sweet marshmallows and the rich brownie base, creating a sophisticated and unforgettable dessert experience. It adds an elegant touch that will impress any guest.

Frosting Option 2: Classic Chocolate Buttercream

For those times when you need a quicker, yet equally delicious, frosting solution, the traditional chocolate buttercream is an excellent choice. This version is wonderfully creamy, buttery, and packed with classic chocolate flavor. It comes together quickly by whipping softened butter with powdered sugar, cocoa powder, and a splash of milk (evaporated or regular). The result is a smooth, pipeable frosting that’s rich and comforting, delivering that familiar, beloved taste of homemade buttercream. While it takes less time to prepare than the ganache, it certainly doesn’t skimp on flavor or texture. It’s a reliable and universally loved option that will make your brownies shine. Whichever frosting you choose, rest assured, both are absolutely delicious and will elevate these marshmallow brownies to new heights!

Serving Suggestions and Storage Tips

These brownies are quite rich, so be sure to have a tall glass of cold milk ready to go with them – it’s the perfect accompaniment to balance the sweetness. For the neatest slices, use a hot knife (run it under hot water and wipe dry) to cut through the marshmallow and frosting layers. This will prevent sticking and tearing, giving you beautifully presented squares. As for leftovers, if you’re lucky enough to have any, make sure to wrap them tightly in an airtight container or plastic wrap. This will keep them moist and fresh for several days at room temperature. The marshmallows tend to firm up slightly when cooled, but the brownies remain wonderfully soft and chewy. Enjoy every delightful bite!

Chocolate Marshmallow Sheet Brownies

Chocolate Marshmallow Sheet Brownies

Created by: The Craft Patch www.thecraftpatchblog.com

These soft and buttery homemade brownies are topped with gooey marshmallows and a delicious from-scratch chocolate frosting. It’s the perfect dessert to feed to a large crowd!

Ingredients

Cream together:

  • 1 cup butter or margarine (softened)
  • 1/2 cup cocoa powder
  • 2 cups sugar

Add:

  • 4 eggs
  • 1 1/2 cups flour
  • 1/2 teaspoon salt
  • 2 teaspoons vanilla

Top With:

  • 16 ounces mini marshmallows (one bag)

Frosting Option 1: Chocolate Buttercream

  • 1/2 cup butter
  • 1 2/3 cups powdered sugar
  • 1/3 cup cocoa powder
  • 1/3 cup evaporated milk (regular milk works too)

Frosting Option 2: Chocolate Ganache

  • 2 cups chocolate chips
  • 2 cups heavy cream

Instructions

  1. Cream together softened butter, cocoa powder, and sugar until well combined and fluffy. Then, add the eggs one at a time, mixing well after each addition. Incorporate the flour, salt, and vanilla extract, mixing until the batter is smooth and just combined. Be careful not to overmix. Spread the brownie batter evenly onto a greased standard sheet pan (approximately 13×18 inches).

  2. Bake the brownies in a preheated oven at 350 degrees Fahrenheit (175 degrees Celsius) for 20 minutes, or until a toothpick inserted into the center comes out with moist crumbs but no wet batter. Immediately remove the pan from the oven and sprinkle one entire package of miniature marshmallows evenly over the hot brownie surface. Return the pan to the oven for an additional 3 minutes, or until the marshmallows are puffed and lightly golden. Remove from oven and let cool for at least one hour before frosting.

  3. For Chocolate Buttercream Frosting: In a large mixing bowl, combine the softened butter, powdered sugar, cocoa powder, and evaporated milk. Begin mixing on low speed until the dry ingredients are moistened, then increase to high speed and whip until the frosting is light, fluffy, and smooth. If the frosting is too thick, add a tiny bit more milk; if too thin, add a bit more powdered sugar until desired consistency is reached.

  4. For Chocolate Ganache Frosting: Place the chocolate chips in a heatproof bowl. Gently warm the heavy cream in a saucepan over medium heat until it just begins to simmer around the edges (do not boil). Pour the hot cream over the chocolate chips and let it sit undisturbed for 5 minutes to allow the chocolate to melt. Then, stir gently with a whisk until the mixture is completely melted and smooth. Refrigerate the ganache mixture for at least two hours, or until thoroughly chilled and firm enough to whip. Once cold, transfer to a mixer with the whisk attachment and whip on high speed until it becomes light, fluffy, and firm, resembling whipped cream.

  5. Once the brownies have cooled and the marshmallow layer has set, carefully spread your chosen frosting evenly over the marshmallow topping. For clean slices, use a hot knife (dipped in hot water and wiped dry before each cut) to cut the brownies into squares. Cover any remaining leftovers tightly with plastic wrap or in an airtight container to prevent them from drying out and to maintain their delightful texture. Serve and enjoy!

Did You Make These Delicious Marshmallow Brownies?

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