Introduction
If you’re a fan of rich, gooey chocolate desserts, then Mississippi Mud Cake is the perfect treat for you. This decadent cake features layers of fudgy chocolate, marshmallows, and crunchy nuts, making it a true crowd-pleaser. Follow this step-by-step guide to create the best Mississippi Mud Cake at home, and indulge in a dessert that’s both easy to make and utterly irresistible.
What is Mississippi Mud Cake?
Mississippi Mud Cake is a rich chocolate cake with a fudgy, gooey texture that’s topped with melted marshmallows and nuts. Its name is inspired by the deep, dark chocolate color resembling the muddy banks of the Mississippi River. This classic Southern dessert is often served at parties, picnics, or family gatherings. What makes it so special is its combination of moist cake, gooey marshmallows, and the crunch of nuts, all topped with a chocolatey frosting that makes every bite heavenly.
Essential Ingredients for a Perfect Mississippi Mud Cake
To make the best Mississippi Mud Cake, you’ll need the following ingredients:
For the Cake:
- 1 ½ cups all-purpose flour
- 1 ½ cups granulated sugar
- 1/2 cup unsweetened cocoa powder
- 1 teaspoon baking powder
- ½ teaspoon baking soda
- 1/2 teaspoon salt
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 cup buttermilk (or whole milk if unavailable)
- ½ cup unsalted butter, melted
- 1 cup hot water
For the Topping:
- 2 cups mini marshmallows
- 1 cup chopped nuts (walnuts or pecans)
- ½ cup chocolate chips (optional)
For the Frosting:
- ½ cup unsalted butter
- 2 tablespoons milk
- 1 cup powdered sugar
- 1 teaspoon vanilla extract
- 3 tablespoons unsweetened cocoa powder
Step-by-Step Instructions for Making Mississippi Mud Cake
Preheat the oven and prepare your pan: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan with butter or non-stick spray and set it aside.
Prepare the cake batter: In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt. Add the eggs, vanilla extract, buttermilk, and melted butter. Mix everything until well combined. Gradually pour in the hot water, mixing until the batter is smooth (it will be thin).
Bake the cake: Pour the batter into the prepared pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Once baked, remove from the oven and let it cool for 10 minutes.
Add the marshmallows: Sprinkle the mini marshmallows evenly over the warm cake. Place the cake back in the oven for 5 minutes, or until the marshmallows are melted and bubbly.
Prepare the frosting: While the marshmallows are melting, prepare the frosting. In a small saucepan, melt the butter and milk over medium heat. Stir in the cocoa powder and bring to a boil, then remove from the heat. Gradually mix in the powdered sugar and vanilla extract. Stir until smooth and glossy.
Frost the cake: Once the marshmallows are melted, remove the cake from the oven. Pour the frosting over the top and spread it evenly. Top with chopped nuts and chocolate chips (optional).
Cool and serve: Let the cake cool completely before slicing into squares. Serve as-is, or with a scoop of vanilla ice cream for an extra treat!
How to Make the Best Chocolate Frosting for Your Mud Cake

The frosting is one of the highlights of Mississippi Mud Cake. To make it truly perfect:
- Use unsweetened cocoa powder: This provides the best depth of flavor.
- Add a little milk: This helps to create a smooth, pourable consistency.
- Adjust the sweetness: Taste your frosting as you go and adjust the sugar to your preference. You can add more powdered sugar if you like your frosting sweeter.
Serving Suggestions and Variations for Your Mississippi Mud Cake
Mississippi Mud Cake is delicious on its own, but you can take it to the next level with these serving ideas:
- Top with whipped cream or ice cream: Add a dollop of whipped cream or a scoop of vanilla ice cream to balance the richness of the cake.
- Add fruit: Fresh strawberries, raspberries, or banana slices can add a refreshing touch to each bite.
- Peanut butter twist: For peanut butter lovers, swirl in some creamy peanut butter to the batter before baking for a nutty variation.
Storing Leftovers:
If you have any leftovers (though that’s unlikely!), store them in an airtight container at room temperature for up to 3 days. You can also refrigerate them for up to a week, but make sure to bring them to room temperature before serving.
Enjoy Your Decadent Mississippi Mud Cake!
This Mississippi Mud Cake is a rich and indulgent dessert that’s perfect for any occasion. With its gooey marshmallows, crunchy nuts, and decadent chocolate flavor, it’s sure to be a hit with family and friends. Follow this easy recipe and enjoy a slice of Southern dessert heaven!