Mississippi Mud Cake

Mississippi Mud Cake recipe, made from scratch, is a rich, dense, decadent chocolate cake covered in gooey marshmallows and warm chocolate frosting. This classic cake recipe never disappoints! 

Serving up slices of Mississippi Mud Cake

Everyone loves chocolate cake, but this one takes the cake. A popular potluck item, Mississippi Mud Cake, sets the bar waaay higher than any other cake can reach! We’re talking moist, rich, chocolate-intense cake with layers of sweet-tooth-satisfying goodness. Oh, YUM!

I don’t discriminate against any baked goods (hey, I love them all), but this easy mud cake is irresistibly drool-worthy. That soft melted marshmallow on top takes it over the top. Even hubby, who isn’t a dessert fan, goes for seconds. So, let’s get down to business and discover what makes this cake extra special!

Content…

Mud Cake vs. Chocolate Cake
What Is It?
Recipe Ingredients
How to Make It
Tips and Tricks
Make-Ahead, Serving & Storage
More Classic Southern Cake Recipes to Try
Watch How to Make It

Diving a fork into an insanely delicious slice of Mississippi Mud Cake

Mud Cake vs. Chocolate Cake

Aren’t they both chocolate cakes? Yes and no. The classic chocolate cake has a moist crumb and melt-in-your-mouth texture, while the mud cake has a denser, fudgier texture, dark brown color, and an overload of chocolate decadence.

Chocolate overload!!! Is that possible? We’ll find out with this drool-worthy recipe for Mississippi Mud Cake.

What Is a Mississippi Mud Cake?

Mud cakes seemed to have been popular back during WWII, though the origin is hotly disputed. Some claim that the Mississippi mud cake is actually a brownie upgrade invented sometime in the 1970s. Toppings include marshmallows, pecans, walnuts, and chocolate pudding, so feel free to get creative for a super easy Mississippi mud cake.

What You Need to Make It

  1. Dry Ingredients – All-purpose flour, sugar, baking powder, baking soda, and a pinch of salt provide the batter’s base. Yes, gluten-free all-purpose flour works fine for a beautiful gluten-free cake.
  2. Unsweetened Cocoa Powder – Turn this deliciously dense cake batter into chocolate heaven with good-quality cocoa powder.
  3. Wet Ingredients – Oil is the fat needed for a tender crumb and a moist, decadent cake. A neutral-flavored oil or butter both work well. Then, room-temperature eggs are an impressive binder that holds it all together. Vanilla extract, whole milk, sour cream, and hot water finish off what you need for the cake batter.
  4. Mini Marshmallows melt in the oven for a gooey, delectable layer between the cake and frosting.
  5. Chocolate Frosting – Salted butter (if unsalted, add a pinch of salt), heavy cream, cocoa powder, vanilla extract, and powdered sugar get together for pure decadence. Add walnuts for a garnish if desired.

How to Make Mississippi Mud Cake

Making the batter for a delicious treat

Mud Cake

  • Preheat oven to 350℉ (180℃). Lightly grease a 9″×13″ baking pan.
  • Sift – In a medium mixing bowl, sift flour, sugar, cocoa powder, baking powder, baking soda, and salt. Set it aside.
  • Wet Ingredients – Beat the oil, eggs, vanilla extract, milk, and sour cream until thoroughly combined in a large mixing bowl. Be careful not to overmix because overmixing can make a tough cake.
  • Hot Water – On low speed, carefully mix in the boiling water. Beat at high speed for a minute so air bubbles form. Hot water creates a richer texture and activates the baking powder more efficiently.
  • Finish Batter – Add the dry ingredients to the wet ingredients and mix well.
  • Bake – Pour batter into the greased cake pan and bake for 30 minutes.
  • Test the mud cake with a toothpick or tester to see if it’s done. If the tester comes out clean, your cake is ready.
  • Marshmallows – Remove the cake from the oven, cover it with mini marshmallows, and put it back in the oven for 2 minutes or until the marshmallows melt slightly.
  • Cool – Take the cake out of the oven and allow it to cool completely. 
Assembling the decadent dessert and baking it

Mud Cake Frosting

  • Melt butter in a small saucepan while the cake is cooling.
  • Flavor – Gradually add the heavy cream and cocoa powder, mixing well with a wooden spoon. Cook for 2 minutes or so while stirring constantly.
  • Final Stretch – Remove from heat and mix in the vanilla extract and powdered sugar with an electric mixer. Beat until smooth.
  • Assemble – Immediately drizzle over the cooled mud cake. Refrigerate for 25-30 minutes until the frosting has set. 
Making the frosting for your delicious Mississippi Mud Cake
Mississippi Mud Cake fresh from the oven and ready to slice

Recipe Notes and Variations

  1. Replace the marshmallows with 10 ounces (280-300g) of marshmallow fluff (marshmallow creme, spread, or paste). Let your cake cool for about five minutes before applying the marshmallow spread. For easy spreading, remove any foil that could damage the microwave, take the lid off, and microwave the jar for 15-20 seconds or until you see it bubbling. Thanks, Kim:)
  2. Some people leave the marshmallows out, and it’s still incredible.
  3. To save time, top the cake with marshmallows and chocolate chips and melt them in the oven for about 5 minutes. Swirl it with a spoon for a dreamy look.
  4. Replace the boiling water with hot coffee to intensify the chocolate flavor.
  5. Replace the all-purpose flour with your favorite gluten-free blend for an equally delicious gluten-free treat.

Make-Ahead, Serving & Storage

Mississippi mud cake makes a great make-ahead because it tastes better the following day. The chocolate has time to set and develop its flavor. 

Serve this deliciousness at room temperature with a good cup of coffee or chai tea latte if you don’t do coffee. Vanilla ice cream and homemade whipped cream are also classic pairings.

Store leftovers in an airtight container for a few days at room temperature, up to three weeks in the fridge, or up to six months in the freezer.

More Classic Southern Cake Recipes to Try

  1. 7-Up Pound Cake
  2. Chocolate Mayonnaise Cake
  3. Red Velvet Cake
  4. Hummingbird Cake

Watch How to Make It

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This blog post was originally published in August 2020 and has been updated with additional tips, new photos, and a video

Mississippi Mud Cake

Made from scratch, this Mississippi mud cake is a rich, dense, decadent chocolate cake covered in gooey marshmallows and warm chocolate frosting. This classic cake recipe never disappoints! 
5 from 26 votes

Ingredients

Cake

  • 2 cups (240g) all-purpose flour 
  • 2 cups (400g) granulated sugar 
  • ½ cup (50g) unsweetened cocoa  
  • 2 teaspoons (9-10g) baking powder 
  • teaspoons (7-8g) baking soda 
  • ½ teaspoon (2-3g) salt 
  • ½ cup (120ml) oil, vegetable or canola 
  • 2 eggs, room temperature
  • 1 teaspoon (5ml) vanilla extract 
  • ½ cup (120ml) whole milk 
  • ¼ cup (60g) sour cream 
  • 1 cup (237ml) boiling water 
  • 10 ounces (284g) mini marshmallows 

Frosting

  • ½ cup (112g) salted butter,  softened 
  • 6 tablespoons (90g) heavy cream 
  • 3 tablespoons (18g) cocoa powder 
  • 1 teaspoon (5ml) vanilla extract 
  • 2-3 cups (240-360g) powdered sugar 
  • walnuts for garnish (optional) 

Instructions

The Cake

  • Preheat oven to 350℉ (175℃). Lightly grease a 9×13-inch baking pan. 
  • In a medium mixing bowl, sift flour, sugar, cocoa powder, baking powder, baking soda, and salt. Set aside.
  • In a large mixing bowl, mix oil, eggs, vanilla, milk, and sour cream until thoroughly combined with an electric mixer, being careful not to overmix. (Overmixing overdevelops the gluten, resulting in a dense, chewy cake.) 
  • On low speed, carefully add the boiling water. Beat the batter on high speed for one minute to create air bubbles. Add the dry ingredients to the wet ingredients and mix until fully combined.
  • Pour the batter into the prepared cake pan and bake for 30 minutes. Toothpick test to see if the cake is done. If the toothpick comes out clean, it's done.
  • Remove the cake from the oven, spread the mini marshmallows over the top, and return it to the oven for 2 minutes or until the marshmallows slightly melt. Remove from oven and allow to cool completely.

The Frosting

  • In a small saucepan, melt the butter. Using a wooden spoon, gradually add heavy cream and cocoa powder. Cook for about 2 minutes, stirring constantly. 
  • Remove from heat and mix in the vanilla and powdered sugar with an electric mixer. Beat until smooth. Immediately drizzle over the cooled cake, and refrigerate for 25-30 minutes or until the frosting sets. 

Tips & Notes:

  1. If you don’t have a sifter, use a strainer with small holes. Sifting is important because it helps the dry ingredients to combine better. It is especially important in this recipe because cocoa powder tends to have clumps. 
  2. If using marshmallow fluff, allow the cake to cool first for about 5 minutes. Then, top the cake with the fluff and let it sit for about 5 minutes before attempting to spread it. The heat from the freshly baked cake will soften the fluff, making it spreadable. Then you can proceed with making the chocolate fudge sauce.
  3. Please keep in mind that nutritional information is a rough estimate and can vary greatly based on the products used.

Nutrition Information:

Serving: 1square| Calories: 767kcal (38%)| Carbohydrates: 137g (46%)| Protein: 9g (18%)| Fat: 25g (38%)| Saturated Fat: 10g (63%)| Polyunsaturated Fat: 4g| Monounsaturated Fat: 10g| Trans Fat: 0.4g| Cholesterol: 61mg (20%)| Sodium: 441mg (19%)| Potassium: 293mg (8%)| Fiber: 6g (25%)| Sugar: 93g (103%)| Vitamin A: 442IU (9%)| Vitamin C: 0.1mg| Calcium: 102mg (10%)| Iron: 4mg (22%)

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30 Comments

  1. 5 stars
    Made this for my son-in-law, who loves Mississippi Mud desserts. Turned out so good, thanks to the simple to follow instructions. Thank you so much for this recipe, Imma! It’s a definite keeper.

    1. Hi Michelle, That’s wonderful to hear! I’m so glad your son-in-law loved it, and I appreciate your kind words. Mississippi Mud desserts are such a treat! Thanks for trying the recipe—happy baking!

  2. 5 stars
    I loved this Recipe. Thank you for sharing it. When I was 9 yrs old I remember our neighbor coming over and handing my mother a Mississippi Mud Cake. I’m know all grown up and came across your recipe. Delicious.

    1. Wonderful! Thank you so much for the feedback Krista! Looking forward to you trying more of my recipes 🙂

  3. 5 stars
    This is the simplest recipe! I just loved how the cake came out. Almost filled the 9×13 pan. Then with the marshmallows and icing! If you could see how we’ll it turned out!

    1. Amazing!!!!! That looks absolutely delicious!! Glad you loved it. Looking forward to you trying more of my recipes.

  4. 5 stars
    I haven’t made this yet. But I know it’s gonna be delicious. I just wanted to let you know that if you use marshmallow creme you can take the lid off & any foil & put it in the microwave for 15 to 20 seconds or until you see it start to bubble over. I will get back to you after I make this cake. I have no doubt it will be delicious.

    1. Great tip, thank you for sharing:) Sure it will be very delicious. Eagerly waiting to see once you finally try!

    1. Yeah, it will work too. Thank you for testing that out and sharing your valuable words. Just one step ahead to add recipe rating:) This will help to for other readers to gain confidence in the recipe.

    1. Thank you so much, Haileigh! So happy to know your family loved this! I hope you’ll get to enjoy more of my recipes 🙂

  5. 5 stars
    This recipe is amazing!!!! The first time I’ve made a cake from scratch and I was surprised by how delicious it was!!!!

  6. I loved this recipe! I did however struggle a little bit with cutting it neatly, do you maybe know of any tricks I can use to make this process smoother

      1. You can also use a plastic knife. The marshmallow won’t stick to the plastic knife, making it much, much easier to cut. I also use one to cut fudge, and it is the best tool for the job.

    1. I can totally see why it’s your all-time favorite dessert! 😉 Thanks for stopping by!

  7. Hieee Imma, simply love ur recipes.. love allll of themCan i do this without Marshmallows?

    Love
    Swati jha

      1. hey Imma, can i bake it in a bundt cake mould as i wont be using marshmallows so i guess it wont be a problem, plz tell me the baking time if i bake it in a bundt cake mould

  8. Thank you for this recipe!! My Mom use to make a cake like this. Of course a lot of years ago. But it was sooo good. Brings back so many memories. Going to make it soon!

5 from 26 votes (18 ratings without comment)

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