This post contains affiliate links.
This Mississippi Mud Cake includes a homemade chocolate cake with melted marshmallows and warm chocolate frosting poured on top. Trust me, it's as delicious as it sounds!
When I think of a chocolate lover's dream, this is the cake that comes to mind! It's called a “Mississippi Mud” cake because of the layers of soft marshmallow and chocolate that make up the topping and frosting. It's one of the easiest cakes to make, baked in a simple 9×13” pan.
I adapted the recipe from my favorite Hershey's Perfectly Chocolate Cake recipe but instead of buttermilk I used milk and sour cream for an extra moist and tender cake. The warm chocolate frosting is the same recipe I use for this popular Texas Sheet Cake. It's SO GOOD!
How to Make Mississippi Mud Cake:
- Combine dry ingredients: flour, sugars, cocoa powder, baking powder, baking soda and salt.
- Add wet ingredients: Add oil, eggs, vanilla, milk and sour cream and mix until combined. Reduce speed and carefully pour in the boiling water. Beat on high speed for 1 minute to add air to the batter.
- Bake: Pour batter into greased 9×13” pan and bake for 28-33 minutes.
- Add marshmallows. Remove cake from oven and sprinkle marshmallows all over the top of the hot cake, completely covering it. Return to oven for 2-3 minutes until marshmallows are puffed up. Cool cake before frosting.
- Make the Frosting: Melt butter in a small saucepan over medium-high heat. Add milk and cocoa powder and whisk well. Cook for about 2-3 more minutes, stirring constantly. Remove from heat and stir in vanilla and powdered sugar. Use an electric mixer to make the frosting smooth.
- Drizzle frosting over cake.
Make Ahead and Freezing Instructions:
The cake can be made 1-2 days in advance, stored covered at room temperature or in the refrigerator. The baked and frosted cake can be frozen for up to 3 months.
More Chocolate Cakes to love:
- The BEST Texas Sheet Cake
- Chocolate Cake with Chocolate Mousse Filling
- German Chocolate Cake
- Chocolate Mug Cake
- Dark Chocolate Cake
- Chocolate Raspberry Cake
FOLLOW ME on FACEBOOK, TWITTER, INSTAGRAM and PINTEREST for more great recipes!
Mississippi Mud Cake
Ingredients
- 2 cups all-purpose flour
- 1 ½ cups granulated sugar
- 1/2 cup light brown sugar, , packed
- 3/4 cup unsweetened cocoa powder
- 2 teaspoons baking powder
- 1 ½ 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
For topping:
- 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
Instructions
- Preheat oven to 350 degrees F. Lightly grease a 9×13” baking pan.
- In a large mixing bowl combine the flour, sugars, cocoa powder, baking powder, baking soda and salt.
- Add oil, eggs, vanilla, milk and sour cream and mix until combined. Reduce speed and carefully pour in the boiling water. Beat on high speed for 1 minute to add air to the batter.
- Pour batter into prepared pan. Bake for 38-45 minutes, or until a toothpick inserted in the center comes out clean.
- Remove cake from oven and sprinkle marshmallows all over the top of the hot cake, completely covering it.
- Return to oven (at 350 degrees F) for 3-5 minutes or until the marshmallows are just slightly puffed and melted.
- Allow cake to cool completely before drizzling frosting on top.
For the frosting:
- Melt butter in a small saucepan over medium-high heat.
- Add milk and cocoa powder and whisk well. Cook for about 2-3 more minutes, stirring constantly.
- Remove from heat and stir in vanilla and powdered sugar. Use an electric mixer to make the frosting smooth.
- Drizzle warm frosting immediately over cake. Refrigerate cake for about 30 minutes or until frosting has set. Store at room temperature.
- Next time try Mississippi Mud Brownies!
Notes
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Text me new recipe ideas!
Simple, tasty ideas sent once a week. No spam.
Have you tried this recipe?!
RATE and COMMENT below! I would love to hear your experience.x
I originally shared this post September 2015. Updated February 2021.
I made this for my new bf and he loved it 😍
I’m making this today for my new BF, trying to impress .. I asked him what he would like and he said Mississippi mud cake.. I found this recipe and liked the instructions.. I will update outcome !
Hi, I made this yesterday for my bunco group. It was very tasty! Question: the marshmallow layer wouldn’t stay on the cake so when I cut the cake the whole top (marshmallow and icing) came off. What did I do wrong?
So glad it was a hit with the bunco crew! 🙌 Sounds like the cake may not have cooled quite enough before the frosting went on—that can cause the marshmallow layer to slide a bit. Next time, let it cool completely after the marshmallows, then pour the warm frosting over and chill it to set. Sticky layers, but worth it 🖤
I halved the recipe and it was the perfect cake ratio. I find it a lot of cake with the whole recipe 🙂
The cake base was different than most other Mississippi mug cake recipes I’ve seen before and it came out perfect! In fact, it was so high I barely had room to put the marshmallows and frosting on top, and my family loved it! I’ll be making the chocolate cake by itself with a regular frosting because it was that good! Thank you for delicious recipe
The cake was so delicious and moist. I used a 13×9 pan, perfect size. I took out at 33 mins considering another 3 mins for the marshmallows. After adding the icing I did sprinkle with toasted pecans. Delicious!
pritty good