Mississippi Mud Pie Brownies Recipe

If you are a lover of rich, decadent desserts that blend fudgy brownies with gooey marshmallows and a luscious chocolate topping, then the Mississippi Mud Pie Brownies Recipe is your new best friend. This classic indulgence combines the dense, velvety texture of homemade brownies with the nostalgic charm of marshmallows melting just right under a glossy chocolate icing. Each bite delivers layers of intense chocolate goodness with a hint of buttery sweetness that will captivate your taste buds and have you craving more. Whether it’s for a family gathering or a special treat after dinner, this recipe guarantees pure comfort and happiness in every square.

Ingredients You’ll Need

All the ingredients in this Mississippi Mud Pie Brownies Recipe are simple yet essential, each playing a crucial role in creating that perfect balance of chewy, fudgy, and sweet textures. From creamy butter and rich cocoa to fluffy marshmallows and silky chocolate, these basics come together to form a dessert that’s anything but ordinary.

• 1 cup unsalted butter (227g): Using a high-quality butter like Kerrygold gives the brownies a rich, creamy base that enhances flavor depth.
• 2½ cups granulated sugar (500g): Sweetens the batter evenly and contributes to the moist crumb of the brownies.
• 2 tablespoons canola oil: Adds moisture and a slight sheen without overpowering the chocolate taste.
• 1 tablespoon vanilla extract: Amplifies the chocolate flavor and adds warmth to the batter.
• 5 large eggs: Vital for structure and that fudgy, dense texture we all love in a good brownie.
• 1 cup all-purpose flour (130g): Provides just enough body without making the brownies cakey or dry.
• ¾ cup + 1 tablespoon Dutch-process cocoa powder (80g): Offers deep chocolate flavor and a beautiful dark color.
• ¾ teaspoon salt: Balances sweetness and enhances all the chocolate notes beautifully.
• 8 ounces dark or milk chocolate: Half goes melted in the batter, with the rest sprinkled on top for that lovely chocolate chunk texture.
• 6 cups mini marshmallows (270g): Signature gooey topping that melts perfectly over the baked brownies.
• 6 tablespoons salted butter (84g): For the glossy icing that ties everything together with a velvety finish.
• 2½ cups powdered sugar (288g): Sweetens and thickens the icing with a delicate texture.
• 2 tablespoons unsweetened cocoa powder: Gives the icing an intense chocolate kick.
• ¼ cup whole milk: Creates the perfect consistency for the icing, making it pourable yet rich.
• 2 teaspoons vanilla extract: Adds that final burst of warm flavor in the icing.

How to Make Mississippi Mud Pie Brownies Recipe

Step 1: Prepare Your Pan

Start by preheating your oven to 350°F and lining a 9×13-inch metal cake pan with parchment paper. Lightly spray the parchment to prevent sticking. I love to overlap two sheets of parchment so it’s easy to lift the brownies out once baked – trust me, this little step saves a lot of hassle!

Step 2: Melt Butter and Sugar

Melt the unsalted butter in a heavy saucepan over low heat, then stir in granulated sugar until the mixture is smooth and emulsified. It’s magical to see the sugar and butter transform into a glossy, unified base – this is the foundation of those irresistibly moist brownies.

Step 3: Add Oil and Vanilla

Once the butter and sugar mixture has cooled slightly, add the canola oil and vanilla extract. Beat with a rubber spatula until the ingredients are fully combined with no visible separation – this ensures a smooth, even batter.

Step 4: Incorporate the Eggs

Beat in the eggs one at a time using your spatula or fork. This gradual addition keeps your batter silky and stable, preventing it from curdling and guaranteeing those fudgy brownies you’re dreaming about.

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. The key is to stir just until no dry streaks remain to avoid overworking the batter — we want tender, not tough brownies.

Step 6: Fold in Chocolate Chunks

Fold most of the chopped dark or milk chocolate into the batter, leaving some to sprinkle on top. These melted chunks in the batter create pockets of molten chocolate magic.

Step 7: Bake the Brownies

Pour the brownie batter into your prepared pan, scatter the remaining chocolate chunks evenly on top, and bake for 25 minutes. This first bake sets the fudgy base, rich with chocolate goodness.

Step 8: Add the Marshmallows

Take the brownies out of the oven and spread the mini marshmallows evenly across the surface. Return them to the oven for an additional 3 minutes until the marshmallows are soft, slightly toasted, and irresistibly gooey.

Step 9: Cool Before Icing

Remove brownies from the oven and let them cool slightly while you prepare the icing — this short wait helps the marshmallows settle for a beautiful finish.

Step 10: Make the Icing

Melt the salted butter over medium heat, then sift in powdered sugar and cocoa powder. Whisk until combined, then add whole milk and vanilla extract. The result is a silky, pourable icing with a deep chocolate flavor that perfectly complements the brownies.

Step 11: Pour the Icing

Immediately pour the warm icing over the marshmallow layer and use a rubber spatula to spread it evenly. It starts to set quickly, so work efficiently to coat every sticky nook and cranny.

Step 12: Let It Set and Slice

Allow the icing to fully set before using a plastic knife to remove the brownies from the pan and cut into squares. A plastic knife prevents sticky messes from your marshmallow topping, giving you clean, perfect pieces every time.

How to Serve Mississippi Mud Pie Brownies Recipe

Garnishes

Sprinkle a few extra mini marshmallows or shaved chocolate on top of each brownie square for an eye-catching presentation. A light dusting of cocoa powder or a drizzle of caramel adds an extra layer of indulgence that’s sure to impress guests.

Side Dishes

Pair your Mississippi Mud Pie Brownies with a scoop of vanilla bean ice cream or a dollop of whipped cream. Fresh berries also cut through the richness beautifully, adding a bright, refreshing contrast to this deeply chocolatey treat.

Creative Ways to Present

Try serving your brownies on a wooden board surrounded by bowls of toppings like crushed nuts, sprinkles, and extra marshmallows for a make-your-own sundae brownie bar. Alternatively, warm individual brownies and top them with a toasted marshmallow for a cozy, decadent dessert experience.

Make Ahead and Storage

Storing Leftovers

Keep leftover Mississippi Mud Pie Brownies in an airtight container at room temperature for up to 3 days. This keeps the texture just right — gooey marshmallows and fudgy brownie intact without drying out.

Freezing

Wrap brownies tightly in plastic wrap and then in foil to freeze for up to 3 months. When ready to enjoy, thaw in the fridge overnight to retain moisture and freshness.

Reheating

To reheat, warm individual brownies briefly in the microwave for about 10 seconds to soften the chocolate and marshmallows without melting the icing completely. This brings back that freshly-baked warmth and gooeyness.

FAQs

Can I use a different type of chocolate?

Absolutely! Dark chocolate adds a rich, slightly bitter note, while milk chocolate lends sweetness and creaminess. You can even mix both to balance the flavors perfectly in the Mississippi Mud Pie Brownies Recipe.

What if I don’t have Dutch-process cocoa powder?

You can substitute regular cocoa powder, but the flavor might be a little sharper and less smooth. For the best taste and color, I recommend Dutch-process if possible.

Can I make these brownies gluten-free?

Yes, simply replace the all-purpose flour with a gluten-free blend that measures cup-for-cup. The texture might be slightly different but still deliciously fudgy and satisfying.

How can I prevent the marshmallows from sticking to my knife when slicing?

The trick is to use a plastic knife or spray a metal knife with nonstick spray and wipe it clean before cutting. This helps the marshmallows release smoothly without tearing.

Is there a way to make these brownies vegan?

It’s a bit tricky given the eggs, butter, and marshmallows, but you could experiment with vegan butter, egg replacers, and vegan marshmallows. Just keep in mind the texture and flavor may differ slightly.

Final Thoughts

Trust me when I say the Mississippi Mud Pie Brownies Recipe is one of those desserts that instantly becomes a favorite in your kitchen. It’s the kind of brownie that feels like a warm hug — rich, comforting, and irresistibly chocolatey with gooey marshmallow magic on top. If you’re ready to treat yourself and loved ones to something truly special, this recipe will not disappoint. Happy baking!

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