5 from 8 votes
Mississippi Mud Cake
A rich, chocolatey recipe for Mississippi Mud Cake! Be sure to check out the how-to video!
Prep Time
45 mins
Cook Time
25 mins
Total Time
1 hr 10 mins
Servings:
24
squares
Calories:
373 kcal
Course:
Dessert
Cuisine:
American
Ingredients
- 1 cup butter cut into pieces, unsalted
- 1 cup water
- ⅓ cup cocoa powder
- 2 cups all-purpose flour
- 1 ½ cups granulated sugar
- ½ cup light brown sugar firmly packed
- 1 teaspoon baking soda
- ¾ teaspoon salt
- ½ teaspoon instant coffee optional
- ½ cup sour cream
- 2 egg lightly beaten, large, room temperature
- 1 teaspoon vanilla extract
Frosting:
- ½ cup milk whole
- 11 Tablespoons butter unsalted
- ¼ teaspoon salt
- ½ cup cocoa powder
- 5 cups powdered sugar
- 1 teaspoon vanilla extract
- 5 cups mini marshmallows one 10 oz bag
Instructions
- Preheat your oven to 350F/175C and lightly grease and flour a 10x15 jelly roll pan (or spray with baking spray).
- In a medium-sized saucepan, combine butter, water, and cocoa powder. Turn heat to medium low and stir occasionally until butter is melted.
- Increase heat to medium-high and (stirring frequently) bring to a rolling boil. Remove from heat and allow to cool for 15-20 minutes.
- Meanwhile, whisk together flour, sugar, baking soda, salt, and instant coffee (if using) in a large bowl. Make a well in the center and add sour cream, eggs, and vanilla extract. Whisk together sour cream/eggs/vanilla in the well, then use a spatula to combine all ingredients in the bowl (mixture will be thick).
- Add slightly cooled chocolate mixture to the flour mixture and stir until well-combined (be careful, chocolate mixture will still be a bit hot).
- Pour batter into prepared pan and carefully (don’t spill!) transfer to 350F (175C) oven. Bake for 20-25 minutes or until toothpick inserted in center comes out clean or with a few moist crumbs, but while cake is baking measure out your marshmallows and prepare frosting.
Cup of Yum
Frosting/Assembly
- Prepare frosting by combining milk and butter in large heatproof bowl and microwave, stirring every 15 seconds, until melted and mixture is warm. Add salt, then sift in cocoa powder and whisk until combined.
- Gradually sift in powdered sugar and whisk until smooth. Stir in vanilla extract.
- Once cake has finished baking, pour mini marshmallows evenly over the top and very gently press them against the surface of the cake (don’t smash the cake!). Pour chocolate frosting evenly over the cake.
- Allow cake to cool and frosting to set, about 1-2 hours, before cutting and enjoying.
Nutrition Information
Serving
1serving
Calories
373kcal
(19%)
Carbohydrates
61g
(20%)
Protein
3g
(6%)
Fat
15g
(23%)
Saturated Fat
9g
(45%)
Cholesterol
51mg
(17%)
Sodium
167mg
(7%)
Potassium
85mg
(2%)
Fiber
1g
(4%)
Sugar
48g
(96%)
Vitamin A
455IU
(9%)
Vitamin C
1mg
(1%)
Calcium
26mg
(3%)
Iron
1mg
(6%)
Nutrition Facts
Serving: 24 squares
Amount Per Serving
Calories 373
% Daily Value*
| Serving | 1serving | |
| Calories | 373kcal | 19% |
| Carbohydrates | 61g | 20% |
| Protein | 3g | 6% |
| Fat | 15g | 23% |
| Saturated Fat | 9g | 45% |
| Cholesterol | 51mg | 17% |
| Sodium | 167mg | 7% |
| Potassium | 85mg | 2% |
| Fiber | 1g | 4% |
| Sugar | 48g | 96% |
| Vitamin A | 455IU | 9% |
| Vitamin C | 1mg | 1% |
| Calcium | 26mg | 3% |
| Iron | 1mg | 6% |
* Percent Daily Values are based on a 2,000 calorie diet.