Mississippi Mud Cake is a rich, indulgent Southern dessert known for its dense chocolate base, gooey marshmallow topping, and smooth chocolate frosting.
Named after the thick, muddy banks of the Mississippi River, this decadent cake is a chocolate lover’s dream. It starts with a moist, fudgy cake layer, often filled with pecans or walnuts, then gets topped with melty mini marshmallows and a generous pour of warm chocolate icing.
The result is a sweet, sticky, layered treat with a delightful mix of textures. Perfect for potlucks, parties, or holidays, it’s a nostalgic favorite that never goes out of style.
Mississippi Mud Cake is a decadent Southern dessert that’s as rich in flavor as the name suggests. Named for its resemblance to the thick, muddy banks of the Mississippi River, this cake is a chocolate lover’s dream.
It starts with a dense and moist chocolate cake, which is then topped immediately after baking with a layer of gooey mini marshmallows. While the cake is still warm, a luscious chocolate frosting is poured over the marshmallows, creating a melted, marbled topping that oozes into every bite.
The result is a sweet, sticky, fudgy masterpiece that’s impossible to resist. Whether you’re serving it at a family gathering or baking it for a weekend treat, Mississippi Mud Cake never fails to impress.
Mississippi Mud Cake
Description
Mississippi Mud Cake is a rich, indulgent Southern dessert featuring a dense chocolate cake base topped with a layer of gooey marshmallows and a fudgy chocolate frosting.
The cake is named for its resemblance to the dark, muddy banks of the Mississippi River.
It’s often baked in a large pan, making it perfect for gatherings, potlucks, or celebrations. With its moist texture and deep cocoa flavor, every bite melts in your mouth.
Chopped pecans or walnuts are commonly added for crunch and contrast. This nostalgic treat is a chocolate lover’s dream and best served warm or at room temperature.
Ingredients
For the Frosting:
Instructions
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Prepare Your Equipment and Ingredients
Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan with butter or non-stick spray. Measure and prepare all your ingredients. Chop nuts if using, and sift your powdered sugar to avoid lumps in the frosting. -
Make the Cake Batter
In a medium saucepan, melt 1 cup of butter over medium heat. Stir in 1/3 cup of cocoa powder until smooth. Remove from heat and let cool slightly. In a large bowl, whisk together the eggs and sugar until well combined and slightly pale. Add the cocoa-butter mixture and stir to combine. Add flour, salt, and vanilla extract. Mix until just combined; do not overmix. Fold in chopped nuts if desired. -
Bake the Cake
Pour the batter into your prepared pan and spread evenly. Bake in the preheated oven for 20 to 25 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs (but no wet batter). -
Add the Marshmallows
Remove the cake from the oven and immediately sprinkle the mini marshmallows evenly over the hot cake. Return to the oven for 2–3 minutes, just until the marshmallows begin to puff but not brown. Remove and set aside while you prepare the frosting.
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Make the Frosting
In a medium saucepan, melt 1/2 cup butter over medium heat. Stir in 1/3 cup cocoa powder and 1/3 cup milk. Bring to a gentle boil, stirring constantly. Remove from heat and stir in the vanilla extract. -
Gradually whisk in the sifted powdered sugar, one cup at a time, until smooth and pourable but thick enough to coat a spoon. Use 3 cups for a thinner glaze, 4 cups for a thicker frosting.
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Frost the Cake
Immediately pour the warm frosting over the marshmallow layer, spreading gently to cover the entire surface. The frosting will partially melt the marshmallows, creating a gooey, marbled topping. -
Cool and Serve
Let the cake cool completely in the pan before slicing. This allows the marshmallow and frosting layers to set slightly. For neater slices, refrigerate the cake for 30 minutes before serving. Cut into squares using a clean, sharp knife.
Nutrition Facts
Servings 16
- Amount Per Serving
- Calories 480kcal
- % Daily Value *
- Total Fat 25g39%
- Saturated Fat 12g60%
- Cholesterol 70mg24%
- Sodium 250mg11%
- Total Carbohydrate 65g22%
- Dietary Fiber 3g12%
- Sugars 50g
- Protein 6g12%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
Mississippi Mud Cake is a decadent, Southern-style dessert that’s rich, gooey, and layered with chocolate, marshmallows, and sometimes nuts.
It’s named after the thick, dark "mud" of the Mississippi River and is beloved for its indulgent texture and flavor.
If you're planning to bake one, here are some expert tips and tricks for both making and serving this crowd-pleasing cake.
Baking Tips for the Perfect Mississippi Mud Cake
- Use High-Quality Cocoa Powder:
The base of a Mississippi Mud Cake is a rich chocolate cake. To ensure deep chocolate flavor, use unsweetened, Dutch-processed cocoa powder. This variety provides a smoother, darker taste that stands out in the cake. - Don’t Overmix the Batter:
Overmixing can lead to a dense or dry cake. Mix until ingredients are just combined to maintain a tender crumb. - Check for Doneness Without Overbaking:
The cake is meant to be moist and slightly fudgy, not dry. Begin checking at the minimum bake time by inserting a toothpick into the center — a few moist crumbs are okay, but not wet batter. - Even Marshmallow Distribution:
When adding mini marshmallows on top of the hot cake, spread them evenly while the cake is still warm so they melt slightly and adhere. You can lightly press them in with a spatula for better stick. - Let It Set Before Adding Frosting:
After layering the marshmallows, allow the cake to cool slightly before pouring the warm chocolate frosting. This helps keep the marshmallows from melting into a puddle and creates defined, gooey layers. - Add Nuts for Crunch (Optional):
Chopped pecans or walnuts add a delightful contrast in texture. Toast the nuts beforehand for deeper flavor and scatter them between the marshmallow and frosting layers or over the top.
Serving Tricks for Best Enjoyment
- Use a Serrated or Hot Knife:
Cutting through marshmallows and gooey frosting can get messy. Run a serrated knife under hot water, wipe it dry, and slice cleanly through the layers. Repeat between cuts. - Serve Slightly Warm:
Mississippi Mud Cake is at its best when served slightly warm. If made ahead, reheat individual slices in the microwave for 10–15 seconds for maximum gooeyness. - Pair with Ice Cream:
A scoop of vanilla ice cream or coffee gelato makes an ideal pairing, balancing the rich chocolate and adding a creamy contrast. - Add a Drizzle:
For a bakery-style finish, drizzle extra chocolate sauce or caramel over each plated slice just before serving. - Make It a Sundae Bar:
Turn slices into a dessert centerpiece by letting guests top theirs with whipped cream, berries, or even crushed candy.
Serving Size and Storage
- Serving Size: A 9x13-inch Mississippi Mud Cake typically serves 12–16 people, depending on how rich your slices are. For potlucks or parties, you can cut smaller squares (even 20+ servings) as it’s very filling.
- Storage Tips:
- Room Temperature: Store in an airtight container for up to 2 days.
- Refrigerator: Keeps for up to 5 days; let it come to room temp or warm slightly before serving.
- Freezer: Freeze individual slices wrapped in plastic and foil. Thaw in the fridge overnight or microwave briefly.
Tips for Success
- Don’t overbake: The cake should be moist and fudgy, not dry. Check early if your oven runs hot.
- Marshmallow meltdown: Don’t let marshmallows brown in the oven—just let them puff up slightly.
- Frosting flow: Pour the frosting while it’s hot to let it seep into the marshmallows for that gooey texture.
- Chill to slice: Refrigerating before slicing makes serving cleaner, but bring to room temperature before eating for best texture.
Storage & Make-Ahead
Store Mississippi Mud Cake in an airtight container at room temperature for up to 2 days or in the refrigerator for up to 5 days. For longer storage, wrap slices tightly in plastic wrap and freeze for up to 2 months. Thaw overnight in the fridge and bring to room temperature before serving.
Final Tips
- Add instant coffee or espresso powder to the cake batter for an even richer chocolate flavor.
- If using homemade frosting, keep it pourable but thick enough to stay on top of the marshmallows.
- Want a twist? Try swapping the base for a brownie layer instead of traditional cake for an extra fudgy experience.
Mississippi Mud Cake is indulgent and unforgettable — with these tips and serving tricks, you’ll deliver a dessert that’s equal parts comforting and impressive.
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Frequently Asked Questions
What is Mississippi Mud Cake?
Mississippi Mud Cake is a rich, Southern-style chocolate dessert made with a dense chocolate cake base, topped with gooey marshmallows and a fudgy chocolate icing. It's called "mud cake" because its dark, sticky layers resemble the thick, muddy banks of the Mississippi River. The result is an indulgent treat, often served warm or at room temperature.
What ingredients are essential for Mississippi Mud Cake?
The core ingredients include:
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Chocolate cake base: all-purpose flour, sugar, butter, eggs, cocoa powder, baking powder/soda, and buttermilk.
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Topping: mini marshmallows
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Icing: butter, cocoa powder, milk, powdered sugar, and sometimes vanilla or nuts (like pecans or walnuts).
While variations exist, these elements are standard in most recipes.
Can Mississippi Mud Cake be made ahead of time?
Yes, this cake actually benefits from sitting for a few hours or overnight, as the flavors meld and the topping sets. You can make it a day in advance and store it at room temperature (covered) or refrigerate it for up to 3–4 days. For best texture, allow it to come to room temperature before serving, or gently warm it in the microwave.
Can I freeze Mississippi Mud Cake?
Absolutely. Let the cake cool completely, wrap it tightly in plastic wrap and foil, and freeze for up to 2 months. Thaw overnight in the fridge or at room temperature. However, the marshmallow topping may change texture slightly, so freezing is best for leftovers or when texture isn’t a top concern.
