Mississippi Mud Brownies

5 from 27 votes

Gooey, and irresistible Mississippi Mud Brownies are loaded with marshmallows, coconut, pecans and fudge frosting. Stop what you are doing and go make these now!

Prep Time15

Cook Time30

Total Time45

Course: Dessert

Cuisine: American

Servings: brownies

Calories: 400kcal

Author: Amy Nash

Ingredients

Brownie base

1 cup salted butter, melted
2 cups granulated sugar
4 large eggs
2 teaspoons vanilla extract
⅔ cup cocoa powder
1 cup all-purpose flour (125g)
½ teaspoon baking powder
½ teaspoon salt
½ cup shredded sweetened coconut
1 ½ cups coarsely chopped pecans, divided
½ (10-ounce) bag miniature marshmallows

Fudge frosting

¼ cup salted butter, melted
3 Tablespoons cocoa powder
½ teaspoon vanilla extract
3 Tablespoons milk
2 cups powdered sugar

Instructions

Preheat oven to 350°F. Line a 9x13-inch baking pan with a parchment paper sling or spray with cooking spray.
In a large bowl, cream together the butter and sugar until light. Add in the eggs and vanilla and beat until smooth. Add cocoa, flour, baking powder, salt, coconut, and 1 cup of the chopped pecans and stir to combine.
Pour the brownie batter into the prepared pan and bake in the preheated oven for 30-40 minutes or until a toothpick or sharp knife inserted in the center comes out clean.
While the brownies are baking, mix all of the frosting ingredients together and beat until smooth. Set aside.
Remove the brownies from the oven and Immediately top with the marshmallows. Wait 5 minutes, then sprinkle remaining chopped pecans on top.
To frost, scoop dollops of frosting over the soft marshmallows while the brownies are still hot and then gently spread or nudge the dollops of frosting around to touch each other. It won't be perfect because the soft marshmallows make it tricky to truly "frost" the brownies, but it will be okay if marshmallow pokes through in places. Frosting these brownies while they are still warm helps because the frosting will melt just a bit and make for extra gooey yumminess.
Cool, then cut into squares and serve.

Notes

Storage: Keep leftover brownies covered in an airtight container on the counter or in the fridge for 3-4 days.
Pecans: You can skip the pecans if someone in your family has allergies or you just don't like them. This would make it more of a marshmallow brownies recipe, but they are still delicious! If you can't have pecans but still want a similar crunch, try replacing them with an equal amount of coarsely broken up pretzels.

Nutrition