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Marshmallow Brownies

Rich chocolate brownies layered with gooey marshmallows and topped with smooth chocolate frosting, these brownies are a nostalgic bake sale favorite.
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Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Servings: 24 bars
Course: Dessert, Snack
Cuisine: American
Calories: 260
Ingredients Method Notes

Ingredients
  

For the Brownies
  • 1 cup unsweetened chocolate Melted with butter
  • 1/2 cup butter Melted with unsweetened chocolate
  • 2 cups granulated sugar
  • 4 large eggs Room temperature
  • 1/2 teaspoon kosher salt
  • 1 cup all-purpose flour
  • 2 cups miniature marshmallows Evenly sprinkled over the brownies
For the Frosting
  • 1/2 cup butter Melted
  • 1/2 cup unsweetened cocoa powder
  • 1/4 cup milk
  • 3-4 cups powdered sugar Sifted, added gradually

Method
 

Preparation
  1. Preheat your oven to 350°F (175°C). Line a 9x13 inch pan with parchment paper or grease it thoroughly.
  2. In a microwave-safe bowl, melt unsweetened chocolate and butter in 30-second intervals until smooth.
  3. Stir in granulated sugar, eggs, and salt until well combined and glossy.
  4. Fold in all-purpose flour until just combined—be careful not to overmix.
  5. Spread batter evenly into the prepared pan and bake for 20 to 25 minutes until center is just set.
  6. Remove from the oven and sprinkle miniature marshmallows evenly across the hot surface.
  7. Return to the oven for about 2 minutes, watching closely for puffed, golden marshmallows.
  8. In a saucepan, melt butter, cocoa powder, and milk over medium heat, stirring until smooth.
  9. Whisk in sifted powdered sugar gradually until frosting is creamy and pourable.
  10. Pour warm frosting over the marshmallow layer and spread gently. Allow to cool completely.
Serving
  1. Slice the brownies into bars after they have cooled completely. Serve at room temperature for best texture and flavor.

Notes

Store leftovers in an airtight container at room temperature for up to three days. Freeze individual brownies for up to two months. For variations, consider adding peanut butter, nuts, or mint extract.