Introduction

These Ultimate Mississippi Mud Brownies are rich, fudgy, and layered with gooey marshmallows and creamy chocolate frosting. They melt in your mouth and are perfect for satisfying any chocolate craving. Simple to make yet irresistibly delicious!

Ultimate Mississippi Mud Brownies That Melt in Your Mouth Recipe - Recipe Image

Ingredients

1 cup unsweetened cocoa powder
1/2 cup oil
1/2 cup butter, softened (unsalted recommended)
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 (for frosting)
1/4 cup evaporated milk
1 teaspoon vanilla extract (for frosting)
3 cups powdered sugar

Instructions

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

Tips & Variations

Use unsalted butter to control the saltiness and enhance flavors.
For extra gooey brownies, add an additional handful of mini marshmallows in the batter.
Try swapping evaporated milk for heavy cream in the frosting for a richer texture.
To make the brownies extra fudgy, slightly underbake by 2-3 minutes.

Storage

Store brownies in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate for up to a week or freeze for up to 3 months. Reheat refrigerated brownies briefly in the microwave to soften frosting before serving.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

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

While you can substitute regular milk, evaporated milk provides a thicker, creamier texture that enhances the frosting. If using regular milk, reduce the amount slightly to maintain consistency.

How do I prevent the brownies from drying out?

Make sure to avoid overbaking and keep the batter gently mixed to retain moisture. Storing brownies in an airtight container also helps keep them soft and fresh.

Ultimate Mississippi Mud Brownies That Melt in Your Mouth Recipe

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4.7 from 142 reviews

Indulge in the Ultimate Mississippi Mud Brownies that melt in your mouth with a perfect balance of rich cocoa, moist texture, and a gooey marshmallow topping finished with a creamy chocolate frosting.

Author: Sophie
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Yield: 12–16 brownies 1x
Category: Dessert
Method: Baking
Cuisine: American

Ingredients

Scale

Brownie Batter

1 cup unsweetened cocoa powder
1/2 cup oil
1/2 cup unsalted butter, softened
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

Preheat Oven 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.
Mix Cocoa and Oil: In a large mixing bowl, whisk together the oil and 1 cup unsweetened cocoa powder until a smooth consistency forms, creating a rich chocolate base for your brownies.
Add Butter and Sugar: Incorporate the softened butter into the mixture and blend until creamy. Then, mix in the granulated sugar thoroughly for sweetness and texture.
Add Eggs and Vanilla: Add the eggs one at a time, mixing well after each addition to bind the ingredients and enrich the batter. Stir in 1 teaspoon vanilla extract to enhance the chocolate aroma.
Add Flour and Salt: Gently fold in the all-purpose flour and salt, taking care not to overmix, which keeps the brownies tender and prevents toughness.
Bake the Brownies: Pour the batter evenly into the prepared pan. Bake in the preheated oven for 25-30 minutes until set but still fudgy.
Add Marshmallows: Remove the brownies from the oven and sprinkle 2 cups of mini marshmallows evenly over the top. Return to the oven for an additional 2-3 minutes or until the marshmallows begin to melt and become gooey.
Cool the Brownies: Allow the brownies to cool completely in the pan to set the layers and make frosting easier to spread.
Prepare Frosting: In a mixing bowl, combine melted butter, 1/4 cup cocoa powder, evaporated milk, and 2 cups powdered sugar until smooth. Gradually add the remaining powdered sugar until the frosting has a thick, spreadable consistency.
Frost and Serve: Spread the rich chocolate frosting evenly over the cooled brownies. Cut into squares and serve for a decadent dessert treat.