Ultimate Mississippi Mud Brownies That Melt in Your Mouth Recipe

ByLily Cross
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Introduction

Ultimate Mississippi Mud Brownies are rich, fudgy, and incredibly indulgent treats that practically melt in your mouth. With layers of gooey marshmallows and a creamy chocolate frosting, these brownies are perfect for chocolate lovers seeking a decadent dessert.

A close-up of a three-layer chocolate dessert slice on a wooden board with a white marbled texture background, the bottom layer is dark, dense, and moist chocolate cake, the middle layer is a creamy, rich, milk chocolate mousse with a smooth texture, and the top layer is a thick, white whipped cream topped with dark chocolate curls scattered unevenly, with a small drop of chocolate sauce on the board near the dessert, photo taken with an iphone --ar 4:5 --v 7

Ingredients

  • 1 cup unsweetened cocoa powder
  • 1/2 cup oil
  • 1/2 cup butter (softened)
  • 1 cup granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 2 cups mini marshmallows
  • 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. Step 1: Preheat your oven to 350°F and grease a 9×13-inch pan with non-stick cooking spray.
  2. Step 2: In a large mixing bowl, whisk together the oil and 1 cup cocoa powder until smooth.
  3. Step 3: Add the softened butter and blend until creamy, then mix in the granulated sugar.
  4. Step 4: Add eggs one at a time, mixing well after each addition, then stir in 1 teaspoon vanilla extract.
  5. Step 5: Gently fold in the flour and salt, taking care not to overmix.
  6. Step 6: Pour the batter into the prepared pan and bake for 25–30 minutes.
  7. Step 7: Remove the brownies from the oven, sprinkle the mini marshmallows evenly on top, then return to the oven for an additional 2–3 minutes until marshmallows are slightly melted.
  8. Step 8: Let the brownies cool completely in the pan.
  9. Step 9: For the frosting, in a bowl, mix melted butter, 1/4 cup cocoa powder, evaporated milk, and 2 cups powdered sugar until smooth.
  10. Step 10: Gradually add the remaining powdered sugar until you reach your desired frosting consistency.
  11. Step 11: Spread the frosting evenly over the cooled brownies, cut into squares, and serve.

Tips & Variations

  • Use unsalted butter to better control the saltiness in the recipe.
  • For extra fudginess, slightly underbake the brownies by a couple of minutes.
  • Substitute mini marshmallows with marshmallow fluff spread after baking if you prefer a smoother top layer.
  • Add chopped nuts like pecans or walnuts to the batter for added texture.
  • Use dark cocoa powder for an even richer chocolate flavor.

Storage

Store the brownies in an airtight container at room temperature for up to 3 days. To keep them longer, refrigerate for up to a week. Reheat briefly in the microwave for 10–15 seconds to soften the frosting before serving.

How to Serve

A close-up of a square piece of layered chocolate dessert on a wooden surface with a small pool of chocolate sauce in front. The dessert has four distinct layers: the bottom layer is dense, dark, and moist chocolate cake; above it is a thick, smooth layer of darker chocolate fudge; next is a lighter, airy chocolate cake layer; and the top is a thick, creamy white layer of frosting covered with irregular dark chocolate curls. Some chocolate drizzle is visible on the creamy top edges. The background is softly blurred with a white marbled texture surface. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use regular milk instead of evaporated milk for the frosting?

Yes, you can substitute evaporated milk with regular milk, but the frosting may be slightly less creamy and thick. You might need to adjust the powdered sugar to get the right consistency.

How do I prevent the marshmallows from burning in the oven?

Keep a close eye on the brownies during the extra baking time with marshmallows. They only need 2–3 minutes to melt and become gooey, so removing them as soon as they puff up and turn lightly golden helps avoid burning.

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Ultimate Mississippi Mud Brownies That Melt in Your Mouth Recipe

★★★★★

4.8 from 105 reviews
  • Author: Lily
  • Total Time: 48 minutes
  • Yield: 12 to 16 servings 1x
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Description

These Ultimate Mississippi Mud Brownies are rich, moist, and decadently chocolaty, topped with gooey marshmallows and a creamy, luscious chocolate frosting. Perfectly baked to create a fudgy texture that melts in your mouth, this classic dessert is a crowd-pleaser for any occasion.

Ingredients

Scale

Brownie Batter

  • 1 cup unsweetened cocoa powder
  • 1/2 cup oil
  • 1/2 cup butter, softened (unsalted preferred)
  • 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 (add gradually)

Instructions

  1. Preheat and prepare pan: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking pan using non-stick cooking spray to prevent sticking.
  2. Combine cocoa and oil: In a large mixing bowl, whisk together the 1 cup of unsweetened cocoa powder with 1/2 cup oil until the mixture is smooth and well combined.
  3. Add butter and sugar: Add the softened 1/2 cup butter to the cocoa and oil mixture, blending until creamy. Then, mix in 1 cup granulated sugar thoroughly.
  4. Incorporate eggs and vanilla: Add the 4 eggs one at a time, mixing after each addition until just combined. Stir in 1 teaspoon vanilla extract for additional flavor.
  5. Mix in dry ingredients: Gently fold in 1 cup all-purpose flour and 1/2 teaspoon salt, being careful not to overmix to avoid tough brownies.
  6. Bake the brownies: Pour the batter evenly into the prepared pan. Bake in the preheated oven for 25-30 minutes, until a toothpick inserted comes out with moist crumbs.
  7. Add marshmallows topping: Remove the brownies from the oven briefly and evenly sprinkle 2 cups mini marshmallows on top. Return to the oven for an additional 2-3 minutes until marshmallows are puffed and slightly golden.
  8. Cool the brownies: Let the brownies cool completely in the pan to set properly before frosting.
  9. Prepare frosting: In a mixing bowl, combine 1/2 cup melted butter, 1/4 cup cocoa powder, 1/4 cup evaporated milk, and 2 cups powdered sugar. Mix until smooth and creamy.
  10. Adjust frosting consistency: Gradually add the remaining powdered sugar, stirring continuously until you achieve your desired frosting thickness.
  11. Frost the brownies: Spread the frosting evenly over the cooled marshmallow-topped brownies using a spatula.
  12. Serve: Cut the brownies into squares and serve. Enjoy the rich, gooey, and decadent Mississippi Mud Brownies!

Notes

  • Do not overmix the batter after adding flour to keep brownies tender.
  • Use unsalted butter to control the salt level in the brownies.
  • Ensure brownies are completely cooled before frosting to prevent melting.
  • For a richer flavor, evaporated milk can be substituted with whole milk if desired.
  • Brownies can be stored in an airtight container at room temperature for up to 3 days.
  • Prep Time: 15 minutes
  • Cook Time: 33 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

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

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