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Best Ever Mississippi Mud Cake Recipe
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Mississippi Mud Cake

This is an easy and classic Mississippi Mud Cake Recipe. This sheet cake is a moist chocolate cake that has marshmallows and is topped with a chocolate frosting. It is such a rich and decadent dessert that is sure to please. 
Prep Time15 mins
Cook Time35 mins
Total Time50 mins
Course: Dessert
Cuisine: American
Keyword: mississippi mud cake
Servings: 12
Author: Jill


  • 1 cup unsalted butter softened
  • ½ cup Ghirardelli cocoa powder
  • 2 cup sugar
  • 4 large eggs
  • 1 ½ cup flour
  • ½ tsp kosher salt
  • 1 cup chopped walnuts
  • 1 tsp pure vanilla extract
  • 2 cup mini marshmallows
  • 1 - 16 oz container of chocolate frosting

Frosting Ingredients

  • 1 cup unsalted butter
  • 4 3/4 - 5 cups powdered sugar
  • 1/3 cup cocoa powder
  • 1 tsp vanilla extract
  • 1/2 cup evaporated milk


  • Preheat oven to 350 degrees and spray a 9x13 baking dish with pam baking spray
  • Using a medium heatproof bowl, melt the butter and cocoa powder
  • together in increments of 45 seconds until completely melted
  • Using a large bowl, whisk together the sugar, vanilla and eggs until combined
  • Gradually whisk in the chocolate butter mixture until combined
  • In a medium bowl, whisk together flour, salt and gradually whisk into the wet ingredients
  • Fold in the chopped walnuts
  • Pour the batter into the baking dish
  • Bake in the oven for 35-45 minutes or until toothpick comes out clean
  • As soon as the cake comes out of the oven top with the marshmallows
  • Place back into the oven for 4 minutes so that the marshmallow starts to slightly melt
  • Place the cake onto the counter
  • Pour frosting over marshmallow cream and spread evenly on top. Let chill in fridge for about 30 minutes.
  • Allow the frosting to set for about an hour before serving!

Frosting Directions

  • In a large saucepan, melt butter over medium low heat. Remove from heat and add powdered sugar, cocoa, vanilla and evaporated milk. Mix until well combined and smooth. Pour evenly over marshmallow layer and spread carefully.