Mississippi Mudslide Bars

Mississippi Mudslide Bars are are a chewy brownie base, topped with a fluffy marshmallow layer, and finished off with a rich and silky chocolate frosting. They are so addictive!

Mississippi mud slide bar on parchment paper.

Hey hey Tiffany here from Creme de la Crumb and I’m so SO excited to be sharing one of my favorite dessert recipes with you today. These Mississippi Mudslide Bars are absolutely, positively addictive. I haven’t been to Mississippi yet but if you Mississippians have anything like this in your fine state, you are living large people. And if these bars are totally not even a Mississippi thing, then they your state must simply be top notch awesome and totally amazing because that’s what these bars are and obviously the namesake must be pretty fantastic too.

Mississippi mud slide bar with a fork full removed.

You can serve these at room temperature but there’s something about that frosting that gets a million times better when it’s chilled. If you’re wondering what exactly these bars are, they are a chewy brownie base, topped with a fluffy marshmallow layer, and finished off with a rich and silky chocolate frosting. Like I said, ADDICTIVE!! Don’t wait another day before making these, you will l.o.v.e. them!

Mississippi Mudslide Bars

Prep Time 15 minutes
Cook Time 30 minutes
Chill 2 hours
Total Time 2 hours 45 minutes
Author Tiffany
Servings 24 Bars

Mississippi Mudslide Bars are are a chewy brownie base, topped with a fluffy marshmallow layer, and finished off with a rich and silky chocolate frosting. They are so addictive!

Course Dessert, Snack
Cuisine American



  • 1 cup butter melted
  • 2 cups sugar
  • 1/3 cup unsweetened cocoa powder
  • 3 large eggs
  • 1 teaspoon vanilla
  • 1/4 teaspoon salt
  • 2 cups flour
  • 4 cups miniature marshmallows


  • 2 cups semisweet chocolate chips
  • ¾ cup heavy whipping cream
  • 2 tablespoons butter
  • 1/4 teaspoon vanilla


  1. Preheat oven to 350 degrees and grease a 9x13 inch baking pan.
  2. In a large bowl combine melted butter, sugar, cocoa powder, eggs, and vanilla and mix until smooth. Add flour and salt and mix until incorporated. Spread batter evenly in prepared pan. Bake for 10-30 minutes until an inserted toothpick in the center comes out clean (a few loose crumbs are okay but no wet batter).
  3. Spread marshmallows in an even layer on top of the brownie layer. Return to oven and bake another 5-7 minutes until marshmallows are fluffy and beginning to lightly brown. Allow to cool while you prepare the frosting.
  4. In a microwave-safe glass bowl combine chocolate chips and heavy cream and microwave on half power for 2 minutes at a time, stirring after each, until smooth. Stir in butter and vanilla til smooth. Pour mixture over marshmallows. Chill at least 2-3 hours or until completely cooled before cutting into bars and serving.
Nutrition Facts
Mississippi Mudslide Bars
Amount Per Serving
Calories 329 Calories from Fat 162
% Daily Value*
Fat 18g28%
Saturated Fat 11g55%
Cholesterol 54mg18%
Sodium 120mg5%
Potassium 130mg4%
Carbohydrates 40g13%
Fiber 2g8%
Sugar 27g30%
Protein 3g6%
Vitamin A 412IU8%
Vitamin C 1mg1%
Calcium 23mg2%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.

All nutritional information is based on third party calculations and is only an estimate. Each recipe and nutritional value will vary depending on the brands you use, measuring methods and portion sizes per household.


Tiffany is an avid cook and photographer who enjoys eating food as much as she does preparing it. She likes to focus on quick, no-fuss meals with lots of big, bold flavors the whole family will love. Putting her own tasty spin on a classic meal or flavor combination is her passion!

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  1. I finally made these after debating long and hard over the vague bake time. I baked them for 20 minutes. Texture was ok , but there was no chocolate flavor for the brownie layer and did not resemble a brownie, nor the picture of the brownie by the recipe. Cocoa powder measurement for a 9×13 pan of brownies is very low.

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