Mississippi Mud Cake Brownies – Fudgy, Gooey & Irresistible

Mississippi Mud Cake Brownies are a Southern classic that delivers everything you love in a dessert — rich, chocolatey brownies layered with melty marshmallows and topped with a silky cocoa frosting. It’s part brownie, part cake, part s’mores… and 100% indulgent. These crowd-pleasing bars are perfect for potlucks, holidays, or when you’re simply craving something fudgy, gooey, and decadent.

Ingredients

For the Brownie Base

• 1 cup (2 sticks) unsalted butter, melted
• 2 cups granulated sugar
• 4 large eggs
• 1 teaspoon vanilla extract
• ⅓ cup unsweetened cocoa powder
• 1½ cups all-purpose flour
• ¼ teaspoon salt
• 1 cup chopped pecans (optional)
• 4 cups mini marshmallows

For the Chocolate Frosting

• ½ cup (1 stick) butter
• ⅓ cup unsweetened cocoa powder
• ⅓ cup milk
• 1 teaspoon vanilla extract
• 3½ cups powdered sugar
  

  Instructions