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–+ servings
Marshmallow Swirl Brownies Stack of fudgy chocolate brownies with gooey marshmallow filling, rich chocolate texture, and scattered marshmallows and chocolate chips.

Marshmallow Swirl Brownies

Rich chocolate brownies layered with melty marshmallows and soft brownie crumbles create a cozy, nostalgic treat that feels bakery-worthy but simple to make.
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Prep Time 20 minutes
Cook Time 40 minutes
Cooling Time 20 minutes
Total Time 1 hour 20 minutes
Servings: 18
Course: Dessert, Snack
Cuisine: American, Baking
Calories: 287
Ingredients Method Nutrition Notes

Ingredients
  

  • 1.125 cups butter melted and slightly cooled, dairy-free works well
  • 1.125 cups granulated sugar used for sweetness and structure
  • 1.125 cups light brown sugar adds moisture and deep flavor
  • 1.125 tablespoons vanilla extract enhances chocolate richness
  • 3.375 large eggs room temperature for smoother mixing
  • 1.125 cups all-purpose flour measured carefully for fudgy texture
  • 1.125 cups Dutch-processed cocoa powder unsweetened for intense chocolate
  • 1.125 teaspoons salt balances sweetness
  • 3.375 tablespoons mini chocolate chips sprinkled for extra chocolate pockets
  • 3.94 cups mini marshmallows small size melts evenly

Method
 

  1. Line an 8×8-inch pan with parchment paper, leaving excess over the sides, and line a loaf pan separately, then preheat the oven to 350°F. prep
  2. Melt the butter in a heat-safe bowl, then whisk in both sugars until the mixture thickens and pulls slightly from the sides. mix
  3. Stir in the eggs and vanilla until glossy, then gently whisk in the flour, cocoa powder, and salt just until combined. mix
  4. Spread about two-thirds of the batter into the square pan and transfer the remaining batter to the loaf pan, then bake both pans together until a toothpick shows moist crumbs. bake
  5. Remove both pans while keeping the oven on, scatter marshmallows over the square pan brownies, and return them to the oven briefly until the marshmallows puff and soften. bake
  6. Break the loaf pan brownies into bite-size chunks while still warm, then remove the marshmallow pan and scatter the brownie pieces over the top, pressing lightly and finishing with chocolate chips. assemble
  7. Allow the brownies to cool fully before lifting them out and slicing into squares. finish

Nutrition

Serving: 65gCalories: 287kcalCarbohydrates: 46gProtein: 3gFat: 11gSaturated Fat: 3gPolyunsaturated Fat: 3gMonounsaturated Fat: 4gTrans Fat: 1gCholesterol: 31mgSodium: 264mgPotassium: 126mgFiber: 2gSugar: 34gVitamin A: 590IUVitamin C: 1mgCalcium: 28mgIron: 1mg

Notes

These brownies are pure comfort food energy—soft centers, gooey tops, and rich chocolate in every bite. They’re perfect for sharing, gifting, or sneaking straight from the pan on a cozy afternoon.

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