What Are Mississippi Mud Cake Brownies?
Mississippi Mud Cake Brownies are an indulgent American dessert that combines a rich, fudgy brownie base with gooey melted marshmallows and a decadent chocolate frosting on top. This layered treat takes inspiration from traditional Mississippi mud cake – named for its resemblance to the dark, muddy banks of the Mississippi River – and turns it into a gooey, crowd-pleasing brownie bar that’s perfect for sharing with family and friends.
Ingredients
For the Brownies
1 cup (2 sticks) butter, melted
2 cups granulated sugar
4 large eggs
1 tsp vanilla extract
½ cup unsweetened cocoa powder
1 ½ cups all-purpose flour
¼ tsp salt
For the Topping
3 cups mini marshmallows
½ cup butter
⅓ cup unsweetened cocoa powder
½ cup milk (or evaporated milk)
4 cups powdered sugar
1 tsp vanilla extract
Step-by-Step Preparation
- Preheat & Prep
Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal later.
- Make the Brownie Batter
In a large bowl, mix the melted butter and granulated sugar until combined. Add the eggs one at a time, stirring after each addition, then stir in the vanilla. Add the cocoa powder, flour, and salt, and mix just until smooth.
- Bake
Pour the brownie batter into your prepared pan and bake for about 25–30 minutes, or until a toothpick inserted into the center comes out mostly clean. Remove from the oven.
- Add Marshmallows
Sprinkle the mini marshmallows evenly over the hot brownies. Return the pan to the oven for 2–3 minutes until the marshmallows puff up slightly. Remove and let cool briefly.
- Prepare the Chocolate Topping
In a saucepan over medium heat, combine the ½ cup butter, ⅓ cup cocoa powder, and ½ cup milk. Whisk and bring just to a boil, then remove from heat. Stir in the vanilla. Gradually mix in the powdered sugar, one cup at a time, until thick but spreadable.
- Finish & Serve
Spread the frosting over the top of the marshmallow layer. Let the brownies cool completely (or chill briefly) before slicing into squares and serving.
Professional Serving Suggestions
Warm with Ice Cream: Serve each brownie square warm with a scoop of vanilla ice cream for a café-style treat.
Coffee Pairing: Pair with espresso or dark roast coffee to balance the sweetness.
Garnish Ideas: Add a light dusting of cocoa powder, a drizzle of caramel sauce, or a sprinkle of chopped nuts (like pecans or walnuts) for texture.
Presentation: Serve on a platter with a garnish of fresh berries or mint leaves for an elegant touch.
Discussion Questions
- What creative variations could you try with this recipe (e.g., adding nuts, substituting marshmallow cream, or using flavored extracts)?
- How might you adapt this dessert for dietary needs (e.g., gluten-free, dairy-free)?
- What occasions would be perfect for serving Mississippi Mud Cake Brownies?
- How do texture and sweetness preferences influence the baking time and ingredient choices?
Important Notes for Success
Don’t overbake: Brownies are best when slightly fudgy in the center — overbaking can dry them out.
Marshmallow timing: Add marshmallows while the brownies are hot so they puff up properly.
Frosting consistency: If the chocolate topping becomes too thick to spread, add a splash more milk and stir until smooth.
Cutting tip: Use a plastic knife for cleaner slices through the marshmallow layer.
Frequently Asked Questions
Q: Can I use a boxed brownie mix instead?
A: Yes — follow the box instructions for the base, then add the marshmallow and chocolate layers as directed.
Q: How should leftovers be stored?
A: Store leftovers in an airtight container at room temperature for up to 3–4 days, or refrigerate for longer freshness.
Q: Can I add nuts to this dessert?
A: Absolutely — chopped pecans or walnuts add extra crunch and flavor.
Enjoy baking and delighting your guests with this irresistible dessert!