This Pioneer Woman Mississippi Mud Cake Recipe is a fudgy and gooey recipe, which is made with gooey marshmallows and toasted pecans. It’s the ultimate comfort food recipe, ready in about 1 hour.
Jump to RecipePioneer Woman Mississippi Mud Cake Ingredients
For The Cake:
- Nonstick cooking spray, for the baking dish
- 2 sticks (1 cup) of salted butter
- 1/4 heaping cup of unsweetened cocoa powder
- 1 cup boiling water
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 1/4 teaspoon kosher salt
- 1/2 cup buttermilk
- 1 teaspoon baking soda
- 1 teaspoon vanilla extract
- 2 large eggs
- One 10-ounce bag of mini marshmallows (about 6 cups)
For The Icing:
- 1 3/4 sticks (14 tablespoons) salted butter
- 6 tablespoons whole milk
- 1/4 heaping cup of unsweetened cocoa powder
- 4 cups sifted confectioners’ sugar
- 1 cup chopped toasted pecans
- 1 tablespoon vanilla extract
How To Make Pioneer Woman Mississippi Mud Cake
For The Cake:
- Prep Oven and Pan: Preheat the oven to 350°F (175°C). Coat a 9×13-inch glass baking dish with nonstick cooking spray.
- Make the Chocolate Base: In a saucepan, melt the butter over medium heat. Stir in the cocoa powder, then carefully whisk in the boiling water. Bring the mixture to a bubble, then immediately turn off the heat and set it aside.
- Mix the Dry Ingredients: In a large bowl, whisk together the flour, granulated sugar, and salt.
- Combine Batter: Pour the warm chocolate mixture into the flour mixture and whisk to combine. In a separate small bowl, whisk together the buttermilk, baking soda, vanilla, and eggs. Pour this into the main bowl and stir until the batter is smooth and well blended.
- Bake the Cake: Pour the batter into the prepared baking dish. Bake for about 20 minutes, or until a toothpick inserted into the center comes out clean.
- Toast the Marshmallows: Remove the cake from the oven. Immediately sprinkle the mini marshmallows evenly over the top of the hot cake. Return the dish to the oven and broil for about 1 minute, watching very closely, until the marshmallows are puffed and lightly browned. Let the cake cool while you make the icing.
For The Icing:
- Make the Icing: In a saucepan, melt the butter over medium heat. Whisk in the milk and cocoa powder until smooth. Remove from the heat.
- Finish and Frost: Gradually whisk in the sifted confectioners’ sugar until the icing is smooth. Stir in the chopped toasted pecans and vanilla extract.
- Frost the Cake: Pour the warm icing evenly over the toasted marshmallow layer, spreading it gently. You can leave a few marshmallows peeking through. Allow the icing to set completely before slicing and serving.

Recipe Tips
- How to get the best cake texture? Don’t overmix the batter once you combine the wet and dry ingredients. Mix only until everything is just combined. This keeps the cake’s crumb light and tender.
- Why do my marshmallows burn under the broiler? The broiler is extremely hot and works very quickly. Do not walk away from the oven. Watch the marshmallows constantly for the entire minute, as they can go from perfectly toasted to burnt in a matter of seconds.
- Why should the cake cool before icing? Allowing the cake and the toasted marshmallow layer to cool slightly before pouring on the hot icing is important. If the cake is too hot, the icing may melt the marshmallows completely and become too thin.
- Why use room temperature ingredients? While not explicitly required for this recipe’s method, having your eggs and buttermilk at room temperature generally helps them incorporate more evenly into batters, leading to a more uniform texture.
What To Serve With Mississippi Mud Cake
This cake is incredibly rich and decadent on its own, but it’s heavenly with:
- A scoop of vanilla bean ice cream
- A dollop of whipped cream
- A cold glass of milk
How To Store Mississippi Mud Cake
- Store: This cake can be stored, covered, at room temperature for up to 3 days. There is no need to refrigerate it unless your kitchen is very warm.
Mississippi Mud Cake Nutrition Facts
- Calories: 230 kcal
- Carbohydrates: 40g
- Protein: 3g
- Fat: 8g
- Sugar: 25g
Nutrition information is estimated and may vary based on ingredients and cooking methods used.
FAQs
Can I make this cake without pecans?
Yes, absolutely. If you have a nut allergy or simply don’t care for them, you can omit the pecans from the icing entirely. The cake will still be delicious.
What if I only have large marshmallows?
You can use large marshmallows. It’s best to cut them in half with kitchen shears before scattering them over the cake for more even coverage.
I don’t have buttermilk. Can I make a substitute?
Yes. For every 1 cup of buttermilk, you can use 1 cup of regular milk mixed with 1 tablespoon of lemon juice or white vinegar. For this recipe, you would mix ½ cup of milk with ½ tablespoon of lemon juice or vinegar and let it sit for 5 minutes before using.
Try More Recipes:
Pioneer Woman Mississippi Mud Cake Recipe
Course: DessertCuisine: AmericanDifficulty: Easy8
servings20
minutes230
kcalA rich, fudgy chocolate cake baked in a single layer, topped with gooey toasted marshmallows and a decadent chocolate-pecan icing.
Ingredients
Cake: 1 cup salted butter, ¼ cup cocoa powder, 1 cup boiling water, 2 cups flour, 2 cups sugar, ¼ tsp salt, ½ cup buttermilk, 1 tsp baking soda, 1 tsp vanilla, 2 eggs, 10oz bag mini marshmallows.
Icing: 14 tbsp salted butter, 6 tbsp milk, ¼ cup cocoa powder, 4 cups confectioners’ sugar, 1 cup toasted pecans, 1 tbsp vanilla.
Directions
- Preheat oven to 350°F (175°C). Grease a 9×13-inch pan.
- For the cake, melt butter with cocoa and boiling water. Mix dry ingredients separately. Combine chocolate and dry mixtures, then add a mix of buttermilk, soda, vanilla, and eggs.
- Pour batter into pan and bake for 20 minutes.
- Top the hot cake with marshmallows and broil for 1 minute until toasted. Let cool.
- For the icing, melt butter with milk and cocoa. Whisk in sugar, then stir in pecans and vanilla.
- Pour warm icing over the marshmallow layer and let it set before serving.
Notes
- Watch the marshmallows very closely under the broiler; they can burn in seconds.
- To keep the cake light and fluffy, be careful not to overmix the batter.
- Let the cake cool slightly before adding the hot icing for the best texture.
- Toasted pecans add a deeper, nuttier flavor to the icing.