Best Mississippi Mud Pie Recipe - House of Nash Eats (2024)

Rich and dark as the muddy Mississippi itself, this Mississippi Mud Pie recipe is a chocolate lover's dream dessert with an Oreo cookie crust, a fudgy brownie-like base, chocolate mousse and chocolate whipped cream with Oreo crumbles sprinkled on top! It's decadent and over-the-top in the best possible way!

I'll be honest and admit that I'm not the biggest chocolate fan in the family and can only handle a small slice of this indulgent dessert! But Paul loved it and our friends who helped us taste test this Mississippi mud pie recipe raved about it and declared it to be perfect. There are a few elements to this recipe, but each one is pretty quick and easy to make and the end result is definitely worth it.

I was overruled by the chocolate lovers about making any changes although personally I think I would love it even more with some chopped pecans or walnuts baked into the bottom brownie layer or some raspberry coulis drizzled over the top!

Mississippi mud pie gets its name because of it's richly brown, chocolate appearance that is said to be the same color as the Mississippi River. This is one of America's favorite pies and had to be included in my collection of Mississippi-inspired recipes as part of my American Eats series!

What You'll Need

Scroll down to the recipe card below this post for ingredient quantities and full instructions.

• Oreo cookies - I always use regular Oreos for our cookie crust, filling and all but chocolate graham crackers or Nabisco's famous chocolate wafers will also work.
• Cocoa powder - For the brownie layer, mousse layer, chocolate whipped cream, and the Oreo crumbles on top. So. Much. Chocolate.
• Chopped bittersweet or semisweet chocolate - This is for the brownie base.
• Milk chocolate chips - You will combine these with the heavy cream for making the chocolate mousse layer.
• Heavy cream
• Sugar - You need brown sugar, granulated sugar, and powdered sugar for the different components of this layered dessert.
• Eggs
• Flour - Regular all-purpose flour works just great in this recipe. Only a small amount is used so the texture is fudgy rather than cakey.
• Butter & oil - The combination of these two fats provides the best texture and flavor to the brownie layer.
• Vanilla extract
• Salt

How to Make Mississippi Mud Pie

1. Make the crust. You can cheat with a storebought Oreo cookie crust, but a homemade version is so much better and only takes minutes to make. Just crush Oreo cookies, filling and all, into fine crumbs using a food processor (affiliate link) or rolling pin and a ziplock bag. Then add just enough melted butter to moisten the crumbs and press them into a 9-inch pie pan.
2. Bake the crust. Bake for 12-15 minutes at 325 degrees F to set the crust, then remove from the oven and set aside.

3. Melt chocolate. Meanwhile, melt the butter, chopped chocolate, oil, and cocoa powder in short 20-30 second bursts in the microwave in a large microwave-safe bowl until smooth. Stop to stir between bursts of heat until the chocolate is melted.

4. Whisk in brownie ingredients. Whisk in the brown sugar, eggs, vanilla extract, and salt until combined. Then add the flour and stir until a thick batter has formed.

5. Fill and bake. Pour the brownie batter into the prepared Oreo crust and bake for 25-30 minutes just until barely set. You want this layer to be a little fudgy and underbaked if anything so make sure to test it with a toothpick. It should come out slightly wet still rather than clean like when you are baking a cake. Set aside to cool completely.

6. Make the mousse filling. Melt chocolate in a large microwave-safe bowl using short bursts of heat and stirring until smooth. Set aside to cool for 5 minutes. Meanwhile, beat cream, cocoa powder, powdered sugar, and a pinch of salt in a large bowl using a whisk attachment until soft peaks form. Add ⅓ of the chocolate whipped cream to the melted and cooled chocolate and stir until combined. Add remaining whipped cream and fold in to make the chocolate mousse.

7. Add mousse layer. Spread the chocolate mousse on top of the chocolate brownie layer, smoothing it to the edges. Refrigerate for 3 hours or overnight.

8. Top with chocolate whipped cream. Beat heavy cream with sugar and vanilla extract until stiff peaks form. Spread on top of the mousse layer.

10. Make Oreo crumble topping. Roughly crush Oreo cookies in a large ziplock bag. Add powdered sugar, cocoa powder, and melted butter, then toss to coat. Spread the pieces onto a baking sheet lined with parchment paper and bake for 10 minutes. Cool completely, then sprinkle on top of the pie to finish.

Recipe FAQ's

Tips for Success

• Don't overmix the mousse. It's tempting to really stir the whipped cream and melted chocolate together to create the mousse, but the harder you work it the more you will knock out the air in the whipped cream that helps create a lovely fluffy mousse layer. Fold the two components together with a rubber spatula for best results.
• Spread out the work. If making the whole recipe in one go sounds overwhelming, you can make the crust and brownie layer one day and finish with the mousse and chocolate whipped cream the next!

Storage Instructions

This pie will keep in the fridge for 4-5 days. Just cover with plastic wrap or keep in an airtight container. You can also freeze the whole pie or individual slices. Let it thaw overnight in the fridge before serving.

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