Name: Mississippi Mud Cake Recipe
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 2 cups all-purpose flour; 1 1/2 cups granulated sugar; 1/2 cup light brown sugar, packed; 3/4 cup unsweetened cocoa powder; 2 teaspoons baking powder; 1 1/2 teaspoons baking soda; 3/4 teaspoon salt; 3/4 cup oil (canola or vegetable); 2 eggs; 1 teaspoon vanilla extract; 6 Tablespoons milk; 1/3 cup sour cream; 1 cup boiling water; 10.5 ounce package mini marshmallows; 1/2 cup butter (1 stick); 6 Tablespoons milk; 3 heaping Tablespoons unsweetened cocoa powder; 1 teaspoon vanilla extract; 3 cups powdered sugar

Jump to Recipe· 4.3 from 21 reviews

If you have a serious sweet tooth and love diving into layers of rich chocolate with a gooey, melt-in-your-mouth finish, this Mississippi Mud Cake Recipe is about to become your new obsession. Imagine a homemade chocolate cake that’s dense yet tender, smothered with molten marshmallows, and finished off with a luscious, warm chocolate frosting that flows over every bite. This dessert is a decadent celebration of chocolate and marshmallow magic, perfect for family gatherings or anytime you need a serious chocolate fix that feels like a cozy hug in cake form.

Ingredients You’ll Need

The image shows a white rectangular baking dish filled with a thick layer of small white marshmallows that completely cover the surface. In the second part of the image, a rich, dark chocolate sauce is being poured in the center of the marshmallows, spreading out slowly over the white top layer. The marshmallows form the topmost layer, contrasting with the glossy, smooth, dark chocolate being added. The dish is placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

What’s amazing about this cake is how simple the ingredient list is, yet each item plays a crucial role in building those layers of texture and deep chocolate flavor you crave. From the cocoa powder that brings the rich chocolate aroma to the marshmallows that create that iconic gooey topping, these basics come together to craft pure comfort in every slice.

2 cups all-purpose flour: Provides the perfect structure and crumb for the cake.
1 1/2 cups granulated sugar: Sweetens the cake while adding a tender texture.
1/2 cup light brown sugar, packed: Adds caramel undertones and moistness.
3/4 cup unsweetened cocoa powder: Intensifies the chocolate flavor with a nice, slightly bitter balance.
2 teaspoons baking powder: Helps the cake rise and stay light, despite its richness.
1 1/2 teaspoons baking soda: Works with the acids for tender and fluffy texture.
3/4 teaspoon salt: Balances sweetness and enhances chocolate depth.
3/4 cup oil (canola or vegetable): Keeps the cake moist and soft.
2 eggs: Bind everything together for that classic cake consistency.
1 teaspoon vanilla extract: Brightens all flavors with its warm, sweet aroma.
6 Tablespoons milk: Adds creaminess to the batter.
1/3 cup sour cream: Contributes to a tender crumb and adds subtle tang.
1 cup boiling water: Intensifies the cocoa flavor and creates a smooth batter.
10.5 ounce package mini marshmallows (for topping): Creates that signature gooey, sweet melt on top.
1/2 cup butter (1 stick): Essential for the rich, creamy frosting.
6 Tablespoons milk (for frosting): Makes the frosting smooth and drizzle-friendly.
3 heaping Tablespoons unsweetened cocoa powder (for frosting): Packs a punch of chocolate goodness.
1 teaspoon vanilla extract (for frosting): Adds a lovely aromatic lift.
3 cups powdered sugar (for frosting): Sweetens and thickens the frosting to the perfect consistency.

How to Make Mississippi Mud Cake Recipe

Step 1: Preheat and Prepare

Start by preheating your oven to 350 degrees Fahrenheit and lightly greasing a 9×13 inch baking pan. Getting this step done first means once your batter is ready, you can pour it in immediately without losing any momentum.

Step 2: Mix the Dry Ingredients

In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, brown sugar, cocoa powder, baking powder, baking soda, and salt. Combining these dry ingredients first ensures even distribution of the leavening agents and chocolate throughout your cake.

Step 3: Add the Wet Ingredients

Next, add the oil, eggs, vanilla extract, milk, and sour cream to the dry ingredients. Mix everything until it’s just combined; this keeps the cake tender. Then, reduce your mixer speed and carefully pour in the boiling water. This step is key because it helps bloom the cocoa powder and adds moisture without making the batter too heavy. Beat on high speed for about 1 minute to incorporate air for a light texture.

Step 4: Bake the Cake

Pour the batter into the prepared pan and bake for 38-45 minutes. You’ll know it’s done when a toothpick inserted into the center comes out clean. The cake should be moist but not undercooked.

Step 5: Add the Marshmallow Topping

Immediately after removing the cake from the oven, sprinkle the mini marshmallows evenly over the top. Return the cake to the oven for 3-5 minutes until the marshmallows are puffed and lightly melted. This step creates that legendary molten marshmallow layer you can’t resist.

Step 6: Cool and Frost

Allow your cake to cool completely before moving on to the frosting. For the frost, melt butter in a saucepan over medium-high heat, then whisk in the milk and cocoa powder. Cook for 2-3 minutes while stirring, remove from heat, and add vanilla and powdered sugar. Use an electric mixer to smooth out the frosting. Drizzle the warm frosting over the cooled cake and refrigerate for about 30 minutes until the frosting sets beautifully.

How to Serve Mississippi Mud Cake Recipe

A close-up of a white rectangular dish filled with a rich, thick dark chocolate dessert. The top layer is glossy and textured with uneven swirls and chocolate pieces giving it a bumpy surface. A woman's hand holds a spatula lifting a large, dense chunk from the corner, showing a moist, dark inside that contrasts slightly with the shiny top. The dish rests on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To elevate your Mississippi Mud Cake Recipe, consider adding a sprinkle of chocolate shavings or a few extra mini marshmallows on top right before serving. You can even dust it lightly with cocoa powder for a final elegant touch that delights both the eyes and taste buds.

Side Dishes

This cake pairs perfectly with a scoop of vanilla ice cream, which contrasts the rich chocolate and marshmallow sweetness with a cool, creamy bite. Alternatively, a dollop of freshly whipped cream or a handful of fresh berries can brighten the dessert experience and add balance.

Creative Ways to Present

If you’re looking to impress guests, serve slices of this cake on rustic wooden boards or vintage china for a charming presentation. You can drizzle extra warm chocolate sauce over individual servings, or invite everyone to assemble their decadent slice topped with chopped pecans or toasted coconut for added texture and flavor.

Make Ahead and Storage

Storing Leftovers

Leftover Mississippi Mud Cake Recipe is a joy to keep around. Store it covered at room temperature if you plan to enjoy it within a day or two, or keep it refrigerated to maintain freshness for up to a week. The frosting stays soft but holds its shape nicely in the fridge.

Freezing

This cake freezes wonderfully. After frosting, wrap it tightly with plastic wrap and aluminum foil or place it in an airtight container. You can freeze the whole cake or individual slices for up to 3 months. Thaw overnight in the refrigerator before serving for best results.

Reheating

If you want to revive the warm, melty quality of freshly baked Mississippi Mud Cake Recipe, gently warm a slice in the microwave for 15-20 seconds. This brings the marshmallow and frosting back to that ooey-gooey perfection, making it feel freshly baked all over again.

FAQs

Can I use a different type of cocoa powder for this Mississippi Mud Cake Recipe?

Absolutely! Both natural and Dutch-processed cocoa powders work well, but Dutch-processed has a mellower flavor that some prefer. Just be sure to stick to unsweetened cocoa powder for the richest chocolate taste.

What if I don’t have sour cream? Can I substitute it?

You can substitute sour cream with plain Greek yogurt or buttermilk in equal amounts. These options maintain the moisture and tanginess that sour cream provides, keeping the cake tender and flavorful.

Is it necessary to use boiling water in the batter?

Yes, boiling water is important because it helps bloom the cocoa powder and dissolve the sugar, leading to a smooth, moist, and intensely chocolatey cake. Using hot, but not boiling water, is ideal.

Can I make this cake gluten-free?

To make a gluten-free version, substitute the all-purpose flour with a gluten-free baking flour blend that includes xanthan gum. Make sure your cocoa powder and other ingredients are gluten-free to avoid cross-contamination.

How do I store this cake if I want to serve it later in the day?

If you’re serving the cake the same day, keep it covered at room temperature until ready. If it’s a hot day or you want to prep ahead, refrigerate it with plastic wrap to keep the marshmallow topping from melting or getting sticky.

Final Thoughts

This Mississippi Mud Cake Recipe invites you to indulge in a classic dessert that never goes out of style. Its rich chocolate layers, gooey marshmallow topping, and luscious frosting make every slice a celebration of comfort and joy. I can’t wait for you to try it and experience how effortless ingredients turn into unforgettable moments of pure deliciousness.