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Ultimate Mississippi Mud Brownies that Melt in Your Mouth Recipe

4.6 from 55 reviews

Indulge in the Ultimate Mississippi Mud Brownies that melt in your mouth with rich cocoa flavor, a gooey marshmallow layer, and a creamy chocolate frosting. Perfectly moist and fudgy, these brownies combine the deep taste of cocoa with a sweet, fluffy marshmallow topping and a luscious homemade frosting for a decadent dessert experience.

Ingredients

Scale

Brownie Base

  • 1 cup unsweetened cocoa powder
  • 1/2 cup oil
  • 1/2 cup butter, softened (preferably unsalted)
  • 1 cup granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt

Topping

  • 2 cups mini marshmallows

Frosting

  • 1/2 cup melted butter
  • 1/4 cup unsweetened cocoa powder
  • 1/4 cup evaporated milk
  • 1 teaspoon vanilla extract
  • 3 cups powdered sugar

Instructions

  1. Preheat and Prepare Pan: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking pan with non-stick cooking spray to ensure easy removal of the brownies.
  2. Mix Cocoa and Oil: In a large mixing bowl, whisk together the unsweetened cocoa powder and oil until smooth and well combined, forming a rich chocolate base.
  3. Add Butter and Sugar: Stir in the softened butter until creamy, then blend in the granulated sugar, ensuring the mixture is well combined and slightly fluffy.
  4. Incorporate Eggs and Vanilla: Add the eggs one at a time, mixing thoroughly after each addition to incorporate air, then stir in the vanilla extract to enhance the chocolate flavor.
  5. Combine Dry Ingredients: Gently fold in the all-purpose flour and salt, taking care not to overmix to maintain a tender brownie texture.
  6. Bake the Brownies: Pour the batter evenly into the prepared pan and bake in the preheated oven for 25 to 30 minutes, until the edges are set and a toothpick inserted near the center comes out with moist crumbs.
  7. Add Marshmallow Topping: Remove the brownies from the oven and immediately sprinkle the mini marshmallows evenly over the surface. Return to the oven for an additional 2 to 3 minutes until the marshmallows become puffed and slightly golden.
  8. Cool the Brownies: Allow the brownies to cool completely in the pan on a wire rack, which prevents the frosting from melting.
  9. Prepare Frosting: In a mixing bowl, combine the melted butter, unsweetened cocoa powder, evaporated milk, and 2 cups of powdered sugar. Stir until smooth and creamy.
  10. Adjust Frosting Consistency: Gradually add the remaining powdered sugar, mixing thoroughly until the frosting reaches your desired thickness for easy spreading.
  11. Frost the Brownies: Spread the chocolate frosting evenly over the cooled brownies with a spatula, covering the marshmallow layer completely.
  12. Serve: Cut the brownies into squares and serve. Enjoy the rich, gooey, and perfectly balanced chocolate treat!

Notes

  • Do not overmix the batter after adding the flour to avoid dense brownies.
  • Use unsalted butter for more control over the saltiness.
  • Ensure brownies are completely cooled before frosting to prevent melting and sliding.
  • The marshmallow topping can be broiled for a minute if you prefer toasted marshmallows, but watch closely to avoid burning.
  • Store brownies in an airtight container at room temperature for up to 3 days or refrigerate for longer freshness.

Keywords: Mississippi Mud Brownies, chocolate brownies, gooey marshmallow brownies, homemade frosting, rich chocolate dessert