Brownie Recipe With Chocolate Chips and Marshmallows: Goey Swirls and Crunchy Edges

This brownie recipe with chocolate chips and marshmallows delivers the perfect balance of fudgy centers and crispy edges, topped with gooey marshmallow swirls that melt into decadent pockets of sweetness. 🔥 The secret lies in layering the marshmallows strategically during baking, ensuring they caramelize just enough to create that signature sticky texture without burning. I've perfected this technique over years of testing, and the result is a brownie so rich and indulgent that even the most disciplined dessert lovers can't resist a second slice.

What sets these brownies apart is the dual texture—dense, moist chocolate cake at the base with crispy edges that give way to the marshmallow swirls on top. The chocolate chips melt into the batter, creating pockets of molten chocolate that contrast beautifully with the marshmallow's fluffy, toasted finish.

Baking at 350°F for about 25-30 minutes ensures the marshmallows caramelize without overcooking, while the edges develop that satisfying crunch.

The moment you pull these brownies from the oven, the aroma of caramelized marshmallows and rich chocolate fills the kitchen, making it impossible to wait for them to cool. Dusting with powdered sugar adds a light, sweet contrast to the dense, fudgy texture below.

Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream for the ultimate indulgence.

This recipe is perfect for special occasions or when you want to treat yourself to something truly decadent. The combination of textures and flavors makes it a crowd-pleaser, whether you're sharing with family or enjoying a solo dessert night. Let's get baking!

Ingredients for brownie recipe with chocolate chips and marshmallows

Twelve decadent ingredients for brownies with molten chocolate and caramelized marshmallow swirls that'll have everyone begging for seconds.

The butter and sugars are your foundation—cold butter ensures flaky layers, while light brown sugar adds moisture and caramel notes. For the cocoa, Dutch-processed gives a smoother texture, but natural cocoa delivers that classic chocolatey bite. I always grab Ghirardelli chocolate chips—they melt into perfect pockets, but any quality brand works. The marshmallows? Jumbo-free is key—they caramelize beautifully without overfilling the batter. Store butter in the fridge until ready to use, and keep sugars in a cool, dry place to prevent clumping.

No vanilla extract? Almond extract at half the amount works in a pinch, but trust me on the vanilla—it makes all the difference. Running low on chocolate chips? Chop a chocolate bar (70% cocoa or higher) for a richer flavor. Marshmallows too big? Pulse in a food processor until they're even-sized. The flour should be sifted—Diamond Crystal is my go-to because it's lighter than others. Prefer a fudgier texture? Add an extra 0.25 cup of cocoa powder. The secret to perfect swirls? Fold marshmallows in at the last minute—they'll melt just enough to create those gooey pockets.

These brownies are best served warm, straight from the oven, but they reheat beautifully—30 seconds in the microwave with a damp paper towel revives that gooey magic. Store leftovers in an airtight container at room temperature for 3 days, or freeze for up to 3 months. For parties, bake in two 9x13-inch pans—they're a crowd-pleaser every time. The powdered sugar dusting? Do it right before serving so it stays crisp. Pair with vanilla ice cream, and you've got dessert perfection.

Step-by-step instructions for brownie recipe with chocolate chips and marshmallows

Here's how to create decadent brownies with gooey swirls and crispy edges—every bite is pure indulgence!

In a stand mixer fitted with the paddle attachment, combine the 1.5 cups unsalted butter (cold and cubed) with the 2 cups granulated sugar and 0.5 cup packed brown sugar. Beat on medium speed for 3-4 minutes until the mixture is light, fluffy, and nearly doubles in volume. You'll see it go from pale to a creamy, ribbon-like consistency—this is what creates those airy pockets in your brownies.

I like to scrape down the sides of the bowl every 30 seconds to ensure even mixing. The butter should be fully incorporated but still hold its shape when you lift the paddle—this prevents dense, cakey brownies. If the mixture feels grainy, keep beating until smooth. Here's the thing—this step is non-negotiable for that perfect texture.

With the mixer still running on medium speed, add the 2 whole large eggs one at a time, mixing well after each addition until fully incorporated. The mixture might look slightly curdled at first, but don't worry—it will come together. Then add the 1 tablespoon vanilla extract and mix for another 10 seconds until fully combined.

This is where the magic happens—the eggs bind everything together while the vanilla infuses deep flavor. I always use room-temperature eggs to ensure they blend smoothly without creating lumps. If you're using cold eggs, let them sit at room temperature for 30 minutes before adding them. The mixture should now be thick and smooth, like a rich brownie batter.

In a separate bowl, whisk together the 1.5 cups all-purpose flour, 0.75 cup cocoa powder, 0.5 teaspoon baking powder, and 0.5 teaspoon salt. Sift the flour mixture directly into the wet ingredients while mixing on low speed for 30-45 seconds—just until combined. You should still see a few flour streaks, but the batter should be smooth and uniform.

Remove the bowl from the mixer and gently fold in the 2 cups semisweet chocolate chips and 0.5 cup dark chocolate chunks using a silicone spatula. Be careful not to overmix—you want to preserve the air pockets created earlier. The batter will be thick and fudgy, almost like cookie dough. This is the perfect consistency for those rich, dense brownies we're after.

Scoop half of the brownie batter into a medium bowl and set aside. To the remaining batter in the mixer bowl, add 3 cups miniature marshmallows and mix on low speed for 10-15 seconds until the marshmallows are evenly distributed and slightly broken up. You want them to melt into the batter but still retain some texture for that gooey surprise in every bite.

Here's the fun part—alternate spoonfuls of plain batter and marshmallow batter into a 9x13-inch baking dish, gently swirling with the back of a spoon to create marbled patterns. Don't overmix while swirling, or you'll lose those beautiful, wavy lines. The goal is to create a visually stunning dessert that's just as delicious as it looks.

Preheat your oven to 350°F and bake the brownies for 25-30 minutes. You'll know they're done when the edges are deep golden brown and a toothpick inserted in the center comes out with moist crumbs (not wet batter). The center should still look slightly underbaked—this ensures that gooey texture we're all craving.

Let the brownies cool in the pan for 15 minutes before transferring to a wire rack. While they cool, dust the top generously with 0.25 cup powdered sugar using a fine-mesh sieve. This adds that classic "snowy" finish and balances the richness of the chocolate. Serve warm for the ultimate experience—each bite should deliver crispy edges, gooey marshmallow pockets, and rich chocolate flavor in perfect harmony.

Regional styles of these flavors

Classic Midwest Style

The Midwest takes these brownies to heart with a hearty, dense texture that's perfect for potlucks and family gatherings. Here, you'll find them baked in a 9x13-inch pan with extra marshmallows—sometimes up to 4 cups—for that signature "s'mores" vibe.

I like adding a sprinkle of crushed graham crackers on top before baking for a nutty crunch that balances the sweetness. Serve warm with a scoop of homemade vanilla ice cream for the ultimate comfort dessert. 🥄

Southern Caramelized Version

In the South, these brownies get a rich caramel twist by folding in ½ cup caramelized onions with the marshmallows. The onions add a deep, savory-sweet contrast that pairs beautifully with the chocolate.

I recommend cooking the onions in 2 tbsp butter until golden brown and jammy before mixing them in. Top with a drizzle of salted caramel sauce before dusting with powdered sugar for an extra layer of indulgence. This version is a showstopper for holiday dinners. 🍯

Pacific Northwest Fudgy Twist

The Pacific Northwest loves their brownies extra fudgy, so they often reduce the flour to 1 cup and increase the cocoa to 1 cup for a deeper chocolate flavor. Here, you'll find raspberry jam swirls replacing marshmallows—about ½ cup folded into half the batter.

The tartness cuts through the richness, and it's topped with toasted coconut flakes for texture. This variation is a hit at local bakeries and perfect for pairing with blackberry compote. 🌿

New York-Style Crispy Edges

New York bakers focus on ultra-crispy edges with a cake-like center, achieved by baking at 375°F for 20-25 minutes instead of 350°F. They also add ½ tsp espresso powder to the dry ingredients to enhance the chocolate flavor.

The marshmallows are folded in just before baking, and the brownies are sliced into small squares for easy sharing. Serve with a side of hot chocolate for the ultimate cozy dessert experience. ☕

Texas-Style Giant Bites

In Texas, these brownies are baked in a 13x9-inch pan but cut into massive, shareable squares—think 3x3-inch portions! The recipe often includes peanut butter swirls alongside the marshmallows, using ½ cup creamy peanut butter mixed into half the batter.

Top with crushed peanuts and a drizzle of peanut butter glaze for a Southern classic that's perfect for tailgates and barbecues. This version is all about bold flavors and big portions. 🥜

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