Easy Mississippi Mud Cake Recipe

There are a few desserts that scream “decadent” quite like a Mississippi Mud Cake. I’ll never forget the first time I tried a slice at a family potluck; it was a gloriously messy, ridiculously rich, and utterly unforgettable experience. This iconic Southern dessert is pure chocolate-lover’s bliss, featuring a dense chocolate cake base, a gooey layer of melted marshmallows, and a crackly, fudgy chocolate frosting studded with crunchy pecans. It’s the kind of cake that makes you close your eyes and savor every single bite.

Why make this recipe

If you’re looking for the ultimate comfort dessert, this is it. This recipe brilliantly simplifies the process by starting with a devil’s food cake mix, which means less measuring and a guaranteed moist, tender crumb every time. It’s a true showstopper for gatherings, potlucks, and family dinners. The combination of textures is what makes it so special: the soft cake, the stretchy marshmallow layer, the rich, smooth frosting, and the satisfying crunch of pecans. It’s an easy-to-make dessert that delivers a seriously impressive and indulgent result.

Ingredients

• 1 box (15.25 oz) devils food cake mix
• 3 large eggs
• 1 cup water
• 1/2 cup vegetable oil
• 5 cups mini marshmallows
• 4 tablespoons salted butter
• 1/2 cup milk
• 3 tablespoons cocoa powder
• 3 cups powdered sugar
• 2 teaspoons vanilla extract
• 1 cup chopped pecans

How to make Mississippi Mud Cake

Step 1: First things first, get your oven preheating to 350°F. Generously spray a 9×13-inch baking pan with nonstick cooking spray and set it aside for later.

Step 2: In a large mixing bowl, combine the devil’s food cake mix, eggs, water, and vegetable oil. Using an electric mixer on medium-high speed, beat everything together for about 1 to 2 minutes until the batter is smooth and well combined.

Step 3: Pour the chocolate cake batter into your prepared pan. Use a spatula to spread it out evenly, making sure it reaches all the corners.

Step 4: Bake for 26-32 minutes, or until a toothpick inserted into the center of the cake comes out clean. Be careful not to overbake to keep the cake wonderfully moist.

Step 5: As soon as you pull the cake from the oven, immediately scatter the mini marshmallows in an even layer over the hot surface. Pop the cake back into the oven for just 3-4 minutes. You’re just looking to soften and slightly melt the marshmallows, not toast them.

Step 6: While the marshmallows are melting, you can start the frosting. In a medium saucepan over medium-high heat, melt the butter, milk, and cocoa powder together. Bring the mixture to a boil, then reduce the heat to low and let it cook for 2 minutes, stirring constantly to prevent scorching.

Step 7: Remove the saucepan from the heat. Whisk in the powdered sugar and vanilla extract until the frosting is completely smooth and glossy. Work quickly to pour this luscious chocolate frosting all over the melted marshmallow layer.

Step 8: Finish your masterpiece by sprinkling the chopped pecans evenly over the top of the warm frosting. For the best slicing experience, refrigerate the cake for at least 30 minutes to allow the layers to set. Enjoy!

How to serve Mississippi Mud Cake

This cake is incredibly versatile when it comes to serving. For the gooiest, most decadent experience, serve it warm, just after the frosting has had a few minutes to set. The marshmallows will be incredibly soft and stretchy! For cleaner, more defined slices, let the cake chill in the refrigerator for 30-60 minutes as the recipe suggests. The frosting will firm up, but the marshmallow layer will remain delightfully soft. A slice of Mississippi Mud Cake is divine on its own, but serving it with a scoop of vanilla bean ice cream or a dollop of fresh whipped cream takes it to a whole new level of deliciousness.

How to store Mississippi Mud Cake

To keep your Mississippi Mud Cake fresh, store it in an airtight container. You can keep it at room temperature for up to 3 days if you prefer a softer, gooier texture. The frosting will stay relatively soft. For longer storage, or if your kitchen is warm, it’s best to store it in the refrigerator for up to 5 days. Chilling will make the frosting firmer. You can serve it cold straight from the fridge or let a slice sit at room temperature for about 20-30 minutes to soften up before enjoying.

Tips to make

• Don’t Overbake the Cake: The key to a great Mississippi Mud Cake is a moist base. Keep a close eye on it and pull it from the oven as soon as a toothpick comes out clean. A dry cake base will detract from the overall gooey texture.
• Use Fresh Marshmallows: For the best melt and stretchiest texture, use a fresh bag of mini marshmallows. Older marshmallows can become dry and won’t melt as smoothly.
• Toast the Pecans: For an extra layer of flavor, spread the chopped pecans on a baking sheet and toast them in the oven for 5-7 minutes at 350°F before the cake is done. Let them cool slightly before sprinkling them on top. It makes a world of difference!
• Work Quickly with the Frosting: The boiled chocolate frosting sets up fast. Have it ready to go as soon as the marshmallows come out of the oven so you can pour and spread it easily over the top.

FAQs About Mississippi Mud Cake

Why is it called Mississippi Mud Cake?
The name is said to come from the cake’s appearance, which resembles the dark, muddy banks of the Mississippi River. The dense chocolate cake, gooey marshmallows, and rich frosting create a “muddy” look that is as delicious as it is messy.

Can I use other nuts or leave them out?
Absolutely! While pecans are traditional, chopped walnuts are a fantastic substitute. If you have a nut allergy or simply aren’t a fan, you can leave the nuts off entirely. The cake will still be incredibly delicious without them.

Can I make this cake from scratch instead of using a box mix?
Yes, you can. If you have a favorite homemade chocolate cake recipe that fits a 9×13-inch pan, feel free to use it as the base. Simply prepare and bake your from-scratch cake, then follow the rest of the steps for adding the marshmallows and frosting as directed.

Final Thoughts

This Mississippi Mud Cake is more than just a dessert; it’s a full-on experience. It’s the perfect recipe to have in your back pocket for when you need a guaranteed crowd-pleaser that feels special but comes together with surprising ease. Each bite is a perfect harmony of rich chocolate, sweet marshmallow, and crunchy nuts. So go ahead, embrace the glorious mess, and treat yourself to a slice of pure Southern comfort.

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Easy Mississippi Mud Cake Recipe (Gooey & Decadent)

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• Total Time: 90 mins
• Yield: 12 servings 1x
• Diet: Vegetarian

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Description

A rich and gooey chocolate cake layered with soft marshmallows, a decadent chocolate frosting, and topped with crunchy pecans. A classic Southern dessert.

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Ingredients

Scale 1x2x3x

1 box (15.25 oz) devils food cake mix

3 large eggs

1 cup water

1/2 cup vegetable oil

5 cups mini marshmallows

4 tablespoons salted butter

1/2 cup milk

3 tablespoons cocoa powder

3 cups powdered sugar

2 teaspoons vanilla extract

1 cup chopped pecans

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Instructions

1. Step 1: Preheat the oven to 350℉ and spray a 9×13-inch pan with nonstick cooking spray.
2. Step 2: In a large mixing bowl, beat the devils food cake mix, eggs, water, and vegetable oil with an electric mixer on medium-high speed for 1-2 minutes until thoroughly combined.
3. Step 3: Pour the cake batter into the prepared pan and use a spatula to smooth out the top.
4. Step 4: Bake for 26-32 minutes, or until a toothpick inserted into the center comes out clean.
5. Step 5: Remove the cake from the oven and immediately spread the mini marshmallows evenly over the hot cake.
6. Step 6: Place the cake back into the oven for 3-4 minutes until the marshmallows are softened and puffy.
7. Step 7: While the marshmallows melt, add the butter, milk, and cocoa powder to a medium saucepan over medium-high heat and bring the mixture to a boil.
8. Step 8: Once boiling, reduce the heat to low and let it cook for 2 minutes, stirring continuously.
9. Step 9: Remove the saucepan from the heat, then whisk in the powdered sugar and vanilla extract until the frosting is smooth.
10. Step 10: Pour the warm chocolate frosting over the marshmallow layer.
11. Step 11: Sprinkle the chopped pecans evenly over the top of the cake.
12. Step 12: Refrigerate the cake for at least 30 minutes to allow the frosting to set before slicing and serving.

Notes

Chilling the cake helps the marshmallows and chocolate set, making it easier to slice. The marshmallows will still remain soft.

For a softer, meltier, and gooier cake, you can serve it immediately after frosting or let it set at room temperature instead of refrigerating.

• Prep Time: 25 mins
• Cook Time: 35 mins
• Category: Dessert
• Method: Baking
• Cuisine: American