Mississippi Mud Pie Brownies Recipe

If you have a serious sweet tooth and love rich, fudgy desserts, then you are in for an absolute treat with this Mississippi Mud Pie Brownies Recipe. Imagine biting into ultra-moist chocolate brownies layered with gooey marshmallows, topped with a luscious cocoa buttercream that melts in your mouth. This dessert is like the ultimate comfort food—deeply chocolatey, satisfyingly chewy, and ridiculously indulgent all at once. Whether you’re serving it for a family gathering or just treating yourself, these brownies will quickly become a beloved favorite that brings a little slice of joy with every bite.

Ingredients You’ll Need

This recipe proves that you don’t need a long list of complicated ingredients to create deep, luxurious flavor and texture. Every component plays a crucial role, from the creamy butter that adds richness to the Dutch-process cocoa powder that delivers intense chocolate notes. Let’s dive into what’s needed to make your Mississippi Mud Pie Brownies Recipe shine.

• 1 cup unsalted butter (227g, I use Kerrygold): Provides a rich, creamy base that keeps brownies fudgy and moist.
• 2½ cups granulated sugar (500g, I use Domino): Sweetens the batter and creates a tender crumb.
• 2 tablespoons canola oil: Helps maintain moistness and adds shine to the batter.
• 1 tablespoon vanilla extract: Adds warm, aromatic notes that enhance the chocolate flavor.
• 5 large eggs (I use Vital Farms): Give structure and richness to the brownies.
• 1 cup all-purpose flour (130g, I use King Arthur): Provides the foundation for the batter’s texture.
• ¾ cup + 1 tablespoon Dutch-process cocoa powder (80g, I use Ghirardelli): Delivers deep, robust chocolate flavor with an intense color.
• ¾ teaspoon salt: Balances sweetness and enhances all the flavors.
• 8 ounces dark or milk chocolate (I like half a Trader Joe’s Pound of Chocolate bar): Adds melty, chocolate chunks for a delightful texture.
• 6 cups mini marshmallows (270g): Create the signature gooey, fluffy layer on top of the brownies.
• 6 tablespoons salted butter (84g): Used in the icing to add richness and a hint of saltiness.
• 2½ cups powdered sugar (288g): Sweetens and thickens the icing topping.
• 2 tablespoons unsweetened cocoa powder: Gives the icing that unmistakable chocolate depth.
• ¼ cup whole milk: Helps achieve the perfect smooth and spreadable consistency for the icing.
• 2 teaspoons vanilla extract: Adds exquisite flavor and rounds out the icing.

How to Make Mississippi Mud Pie Brownies Recipe

Step 1: Prepare Your Baking Pan

Start by preheating your oven to 350°F and lining a 9×13-inch metal cake pan with parchment paper. Make sure to leave some parchment hanging over the edges—this makes lifting the brownies out a breeze later on. Lightly spray the parchment with cooking spray for extra non-stick confidence. Using two pieces of parchment, arranged perpendicularly, helps cover the pan completely for easy removal.

Step 2: Melt the Butter and Mix in the Sugar

Gently melt the 1 cup of unsalted butter over low heat in a heavy-bottomed saucepan. Gradually stir in the granulated sugar until the mixture becomes smooth and slightly emulsified. This step is key to achieving that satisfyingly chewy texture, so take your time and make sure the butter and sugar meld beautifully. Let it cool for about 5 minutes, stirring occasionally to release heat and avoid cooking the eggs later.

Step 3: Add Oil and Vanilla

Stir in the canola oil and vanilla extract next. Use a rubber spatula to beat the mixture until everything is fully combined and the texture is smooth with no separation—think rich, glossy chocolate batter in the making.

Step 4: Incorporate the Eggs

Now add the eggs one at a time, beating with your spatula or fork after each addition. This slow incorporation creates the perfect structure for your brownies, keeping them dense but tender. By the end, your batter should be smooth and velvety.

Step 5: Mix in the Dry Ingredients

Sift together the flour, Dutch-process cocoa powder, and salt, then gently fold them into the wet ingredients. Be careful not to overmix—you want just enough stirring to remove all the dry streaks. This ensures your brownies stay fabulously fudgy instead of cakey.

Step 6: Fold in the Chocolate Chunks

Chop the chocolate into chunks and fold most of it into the batter for pockets of melty indulgence throughout. Reserve a handful to scatter on top before baking—that way every bite is packed with chocolate goodness.

Step 7: Bake the Brownies

Pour your rich brownie batter into the prepared pan and smooth it out evenly. Sprinkle the remaining chocolate chunks on top for a stunning finished look. Bake for 25 minutes at 350°F until the edges are just set but the center still looks slightly moist.

Step 8: Add the Marshmallows

Take the brownies out of the oven and cover the surface with a generous layer of mini marshmallows. Then pop the pan back in the oven for an additional 3 minutes—just long enough for the marshmallows to soften and begin to turn golden and gooey.

Step 9: Prepare the Icing While Cooling

While the brownies cool for a few minutes, prepare the icing. Melt the salted butter in a saucepan over medium heat, then whisk in the powdered sugar and cocoa powder until smooth. Slowly add milk and vanilla extract, whisking continuously until you have an irresistibly creamy chocolate glaze.

Step 10: Ice the Brownies

Remove the pan from heat and pour the chocolate icing immediately over the melted marshmallows. Using a rubber spatula, spread it evenly. The icing will start to set quickly into a glossy, decadent topping that perfectly finishes your brownies.

Step 11: Let Set and Serve

Allow the icing to set completely at room temperature before using the parchment paper to lift the whole slab from the pan. Slice the brownies into 24 squares using a plastic knife to prevent sticky marshmallow messes. Now your Mississippi Mud Pie Brownies Recipe is ready to wow anyone lucky enough to enjoy it!

How to Serve Mississippi Mud Pie Brownies Recipe

Garnishes

Adding a sprinkle of flaky sea salt on top just before serving elevates the richness by balancing the sweetness beautifully. For extra drama, drizzle some warm caramel or dust with a touch of powdered sugar for an elegant finish. A few fresh raspberries or sliced strawberries can also bring a bright, tart contrast to the dense chocolaty layers.

Side Dishes

Serve these brownies alongside a scoop of vanilla bean ice cream or a dollop of freshly whipped cream to complement their fudgy texture with creamy coolness. A strong cup of black coffee or a rich espresso pairs wonderfully, cutting through the sweetness while enhancing the chocolate depth.

Creative Ways to Present

Turn your Mississippi Mud Pie Brownies Recipe into a layered dessert by assembling brownie chunks, whipped cream, and chocolate shavings in individual glasses for an impressive trifle-style treat. Alternatively, cut the brownies into small squares and serve them on a dessert platter with colorful sprinkles or edible flowers for a festive celebration touch.

Make Ahead and Storage

Storing Leftovers

Keep any leftover Mississippi Mud Pie Brownies Recipe in an airtight container at room temperature for up to 3 days. This timing ensures the marshmallow topping stays soft and the icing retains its luscious consistency without drying out.

Freezing

If you want to save them longer, wrap individual brownies tightly in plastic wrap and place them in a freezer-safe container or bag. They freeze beautifully for up to 2 months. Thaw at room temperature before serving to keep all the gooey goodness intact.

Reheating

To enjoy warm, slightly melted brownies, microwave a single piece for 15-20 seconds. This brings back that freshly baked feeling with melted chocolate and soft marshmallows, perfect for cozying up on chilly days.

FAQs

Can I use regular cocoa powder instead of Dutch-process?

Yes, you can substitute regular cocoa powder if that’s what you have on hand, but Dutch-process cocoa tends to produce a smoother, less acidic chocolate flavor, which is ideal for this recipe.

Is there a way to make this recipe gluten-free?

Absolutely! Swap the all-purpose flour for a gluten-free baking blend with a 1:1 substitution. Just make sure it contains xanthan gum for the best texture.

Can I use a different type of chocolate?

Feel free to use either milk, dark, or even white chocolate chunks based on your preference. Dark chocolate offers more bittersweet contrast, while milk chocolate keeps it sweeter and creamier.

Why do the brownies need two types of butter?

The first cup of butter is melted into the batter itself, which helps create a moist, rich texture. The smaller amount of salted butter is for the icing, balancing sweetness and adding depth to the chocolate glaze.

How do I prevent marshmallows from sticking to the knife?

Using a plastic knife works best because metal knives tend to pick up sticky marshmallow bits. Alternatively, lightly spray a metal knife with nonstick spray and wipe it clean between cuts.

Final Thoughts

There’s something magical about this Mississippi Mud Pie Brownies Recipe that makes it more than just a dessert—it’s an experience. From the fudgy chocolate base to the ooey-gooey marshmallow topping and luscious chocolate icing, it’s a showstopper that brings smiles every time. I truly hope you give this recipe a try and share it with the special people in your life because homemade brownies this decadent deserve to be enjoyed together.

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