Mississippi Mud Cake
20 min
60 min



2 cups sugar

1 cup Land O Lakes® Butter, softened

4 large Land O Lakes® Eggs

2 teaspoons vanilla

1 1/4 cups all-purpose flour

1/2 cup unsweetened cocoa

1/2 teaspoon baking powder

1 cup chopped walnuts

3 cups miniature marshmallows


1/3 cup Land O Lakes® Butter, softened

2 1/2 cups powdered sugar

1/2 cup unsweetened cocoa

1/3 cup Land O Lakes® Half & Half

1 teaspoon vanilla

How to make

  1. STEP 1

    Heat oven to 350°F. Line 13x9-inch baking pan with aluminum foil, extending foil over edges. Spray foil with no-stick cooking spray.

  2. STEP 2

    Combine sugar and 1 cup butter in bowl; beat at medium speed until well mixed. Add eggs and 2 teaspoons vanilla; continue beating until well mixed. Add flour, 1/2 cup cocoa and baking powder; beat at low speed until well mixed. Stir in walnuts.

  3. STEP 3

    Spread batter into prepared pan. Bake 35-45 minutes or until toothpick inserted in center comes out clean. Immediately sprinkle marshmallows over top. Continue baking 2-3 minutes or until marshmallows are puffed and softened.

  4. STEP 4

    Combine 1/3 cup butter, powdered sugar, 1/2 cup cocoa, half & half and 1 teaspoon vanilla in bowl; beat at medium speed until well mixed. Immediately spread over marshmallows creating a marbled or “muddied” effect.


15Fat (mg)
65Cholesterol (mg)
115Sodium (mg)
42Carbohydrates (g)
1Dietary Fiber
3Protein (g)


Explore reviews from
our online community

  March 21, 2014

I've been making this cake for a long time now. Its very sweet but oh so YUMMY! Just wanted to give my version of frosting the cake......first, I spread the marshmallows on top of the hot cake then I melt the butter in a saucepan, mix in the cocoa and then the milk. Heat until hot but not boiling. Add the powered sugar and vanilla. Stir until all powered sugar is dissolved. If you have lumps, you can use a hand mixer right in the pan to smooth them out. Usually its hot enough to dissolve though. Then pour the hot frosting over top the marshmallows. This eliminates having to put the cake back in the oven to melt the marshmallows. They melt between the hot cake and the hot frosting. You can Leave as is or swirl the marshmallows into the frosting. The frosting will firm up as it cools. I sometimes poke a whole walnut or pecan (whichever one you're using) into the frosting for each serving square. I love having a piece while its still warm! I've also warmed a piece in the microwave just until you see the frosting and marshmallow start to melt over! YUMMY! This sounds long, but really is very simple!

— says sage05
  March 15, 2014

The cake and frosting have a good flavor, but way too sweet. It would be much better with a cake that's not so sweet.

— says Ann
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