Mississippi Mud Brownies are delicious chocolate brownies topped with toasted pecans and marshmallows and a rich chocolate frosting.

stack of three mississippi mud brownies

These brownie are the best of all worlds! You’ll get a rich and fudgy brownie with layers of marshmallow and pecans too. To make things even more decadent, there is a fabulous chocolate frosting slathered on top. You can’t bake much better than these Mississippi Mud Brownies!

ingredients displayed for making mississippi mud brownies

Ingredients needed:

  • unsweetened chocolate
  • salted butter
  • white sugar
  • eggs
  • all purpose flour
  • pecans
  • mini marshmallows
  • milk
  • unsweetened cocoa powder
  • powdered sugar
  • vanilla extract

four photos showing assembly of making mississippi mud brownies

How to make Mississippi Mud Brownies:

The complete, printable recipe is at the end of this post.

PREPARE THE BROWNIES:

  1. Preheat the oven to 350°F. Spray a 13×9-inch baking dish with nonstick spray.
  2. In a large microwave-safe bowl, microwave the chocolate and butter for 1 to 2 minutes, or until melted and smooth, stirring at 30-second intervals. Whisk in the sugar and eggs until well-blended. Stir in the flour Spread the batter into the prepared pan.
  3. Bake for 25 to 30 minutes or until a toothpick inserted into the center comes out with a few moist crumbs. Sprinkle the warm brownies with the toasted pecans and marshmallows.

PREPARE THE FROSTING:

  1. In a large saucepan, cook the butter, milk and cocoa, stirring constantly, for 4 to 5 minutes or until the butter melts. Remove the pan from heat, and use an electric mixer to beat in the powdered sugar and vanilla at medium speed until smooth.
  2. Pour the frosting over the pecans and marshmallows; spread to the edges.

mississippi mud brownies cut into pieces

Let the brownies cool for 1 hour on a wire rack. Cut into squares. 

stack of mississippi mud brownies

If they’re too messy, you may with to serve them on a plate with a fork! They won’t be messy to eat if you give them a chance to cool and set.

stack of mississippi mud brownies

These are the kind of brownies that will fly off a dessert platter at a party. Everyone loves a good brownie. And this is definitely one to savor and celebrate. Enjoy!

bite taken out of brownie

Favorite Chocolate Desserts:

stack of three mississippi mud brownies
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Mississippi Mud Brownies

These brownies have the most amazing icing and toppings!
Prep: 10 minutes
Cook: 35 minutes
Cooling Time: 1 hour
Total: 1 hour 45 minutes
Servings: 10 servings
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Ingredients

BROWNIES:

CHOCOLATE FROSTING:

Instructions 

PREPARE THE BROWNIES:

  • Preheat the oven to 350°F. Spray a 13x9-inch baking dish with nonstick spray.
  • In a large microwave-safe bowl, microwave the chocolate and butter for 1 to 2 minutes, or until melted and smooth, stirring at 30-second intervals. Whisk in the sugar and eggs until well-blended. Stir in the flour Spread the batter into the prepared pan.
  • Bake for 25 to 30 minutes or until a toothpick inserted into the center comes out with a few moist crumbs. Sprinkle the warm brownies with the toasted pecans and marshmallows.

PREPARE THE FROSTING:

  • In a large saucepan, cook the butter, milk and cocoa, stirring constantly, for 4 to 5 minutes or until the butter melts. Remove the pan from heat, and use an electric mixer to beat in the powdered sugar and vanilla at medium speed until smooth.
  • Pour the frosting over the pecans and marshmallows; spread to the edges. Let cool for 1 hour on a wire rack. Cut into squares. If they're too messy, you may with to serve them on a plate with a fork!

Nutrition

Serving: 1brownie, Calories: 837kcal, Carbohydrates: 115g, Protein: 8g, Fat: 43g, Saturated Fat: 21g, Polyunsaturated Fat: 5g, Monounsaturated Fat: 15g, Trans Fat: 1g, Cholesterol: 139mg, Sodium: 239mg, Potassium: 264mg, Fiber: 5g, Sugar: 94g, Vitamin A: 869IU, Vitamin C: 0.2mg, Calcium: 57mg, Iron: 4mg

Nutrition information is automatically calculated, so should only be used as an approximation.

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