Print

Ultimate Mississippi Mud Brownies That Melt in Your Mouth Recipe

4.6 from 358 reviews

Indulge in these Ultimate Mississippi Mud Brownies that melt in your mouth with a rich chocolate flavor, gooey marshmallow layer, and creamy cocoa frosting. Perfectly moist and fudgy, these brownies are a decadent dessert treat for any chocolate lover.

Ingredients

Scale

Brownie Batter

  • 1 cup unsweetened cocoa powder (Adds deep chocolate flavor)
  • 1/2 cup oil (Keeps brownies moist)
  • 1/2 cup butter, softened (Use unsalted for better control)
  • 1 cup granulated sugar (Sweetens mix and helps create a crust)
  • 4 large eggs (Bind ingredients and add richness)
  • 1 teaspoon vanilla extract (Enhances chocolate flavor)
  • 1 cup all-purpose flour (Provides structure, don’t over-mix)
  • 1/2 teaspoon salt (Balances sweetness)
  • 2 cups mini marshmallows (Creates a gooey layer)

Frosting

  • 1/2 cup melted butter (Base for creamy frosting)
  • 1/4 cup unsweetened cocoa powder (Adds chocolate richness)
  • 1/4 cup evaporated milk (Gives smooth consistency)
  • 1 teaspoon vanilla extract (Infuses frosting with flavor)
  • 3 cups powdered sugar (Thickens frosting, add gradually)

Instructions

  1. Preheat and Prepare Pan: Preheat your oven to 350°F and grease a 9×13-inch baking pan with non-stick cooking spray to prevent sticking.
  2. Mix Cocoa and Oil: In a large mixing bowl, whisk together the oil and unsweetened cocoa powder until the mixture is smooth and well combined.
  3. Add Butter and Sugar: Incorporate the softened butter into the cocoa mixture and blend until creamy, then mix in the granulated sugar thoroughly.
  4. Add Eggs and Vanilla: Add the eggs one at a time, mixing after each addition to ensure even incorporation, then stir in the vanilla extract.
  5. Combine Dry Ingredients: Gently fold in the all-purpose flour and salt, being careful not to overmix to keep the brownies tender.
  6. Bake Brownies: Pour the batter evenly into the prepared pan and bake in the preheated oven for 25 to 30 minutes, until set but still moist.
  7. Add Marshmallows: Remove the pan from the oven and immediately sprinkle the mini marshmallows evenly over the top, then return to the oven for an additional 2 to 3 minutes until marshmallows are soft and slightly melted.
  8. Cool Brownies: Let the brownies cool completely in the pan to set the layers before frosting.
  9. Prepare Frosting: In a bowl, mix the melted butter, cocoa powder, evaporated milk, and 2 cups of powdered sugar until smooth and creamy.
  10. Adjust Frosting Consistency: Gradually add remaining powdered sugar until the frosting reaches your desired thickness for spreading.
  11. Frost Brownies: Spread the prepared frosting evenly over the cooled brownies.
  12. Serve: Cut the frosted brownies into squares and serve for a luscious chocolate dessert experience.

Notes

  • Do not overmix the batter after adding flour to maintain a fudgy texture.
  • If marshmallows brown too quickly, watch closely or reduce the broil time slightly.
  • Allow brownies to cool completely before frosting to prevent melting.
  • Use unsalted butter to better control the saltiness in the recipe.
  • Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.

Keywords: Mississippi Mud Brownies, fudgy brownies, chocolate brownies, gooey brownies, marshmallow brownies, chocolate frosting