Name: Mississippi Mud Pie Recipe
Prep time: 20 min
Cook time: 55 min
Total time: 3 h 35 min
Cuisine: American
Ingredients: 25 Oreo cookies; 6 tablespoons salted butter (melted); 4 ounces bittersweet chocolate (chopped); 3 tablespoons salted butter (melted); 3 tablespoons vegetable oil; 2 tablespoons unsweetened cocoa powder; 2/3 cup light brown sugar; 2 large eggs; 2 teaspoons vanilla extract; 1/4 teaspoon salt; 3 tablespoons all-purpose flour; 8 Oreo cookies; 2 tablespoons powdered sugar; 1 tablespoon dutch-processed cocoa powder; Pinch of salt; 2 tablespoons salted butter (melted); 6 ounces milk chocolate (chopped); 1 cup cold heavy cream; 2 tablespoons dutch-processed cocoa powder; 2 tablespoons powdered sugar; Pinch of salt; 1 cup heavy cream; 1/4 cup granulated sugar; 3 tablespoons unsweetened cocoa powder

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Introduction

Mississippi Mud Pie is a decadent chocolate dessert that combines a rich Oreo crust, fudgy brownie layer, silky chocolate mousse, and fluffy cocoa whipped cream. This pie is perfect for chocolate lovers looking for a show-stopping yet approachable treat.

A slice of a layered chocolate mousse pie is being lifted, showing four distinct layers from bottom to top: a dark chocolate crumb crust, a dense dark chocolate mousse, a lighter milk chocolate mousse, and a fluffy light brown whipped mousse topping. The surface is sprinkled with crumbled chocolate cookie pieces. The pie sits in a clear glass pie dish on a white marbled surface, with black measuring spoons nearby. The image captures the textures from crumbly to creamy in a close-up view. photo taken with an iphone --ar 4:5 --v 7

Ingredients

25 Oreo cookies
6 Tablespoons salted butter (melted)
4 ounces bittersweet chocolate (chopped)
3 Tablespoons salted butter (melted)
3 Tablespoons vegetable oil
2 Tablespoons unsweetened cocoa powder
2/3 cup light brown sugar
2 large eggs
2 teaspoons vanilla extract
1/4 teaspoon salt
3 Tablespoons all-purpose flour
8 Oreo cookies
2 Tablespoons powdered sugar
1 Tablespoon dutch-processed cocoa powder
Pinch of salt
2 Tablespoons salted butter (melted)
6 ounces milk chocolate (chopped)
1 cup cold heavy cream
2 Tablespoons dutch-processed cocoa powder
2 Tablespoons powdered sugar
Pinch of salt
1 cup heavy cream
1/4 cup granulated sugar
3 Tablespoons unsweetened cocoa powder

Instructions

Step 1: Preheat the oven to 325°F. Finely crush 25 Oreos into crumbs using a food processor or by placing them in a heavy-duty ziplock bag and crushing with a rolling pin.
Step 2: Mix the Oreo crumbs with 6 tablespoons melted salted butter until evenly moistened. Press this mixture firmly into a 9-inch pie plate to form the crust. Bake for 12-15 minutes until set, then remove from oven.
Step 3: For the brownie layer, heat 4 ounces bittersweet chocolate, 3 tablespoons melted salted butter, 3 tablespoons vegetable oil, and 2 tablespoons unsweetened cocoa powder in 20-second increments in the microwave, stirring between each until melted and smooth.
Step 4: Add 2/3 cup light brown sugar, 2 large eggs, 2 teaspoons vanilla extract, and 1/4 teaspoon salt to the chocolate mixture. Whisk until combined.
Step 5: Stir in 3 tablespoons all-purpose flour until incorporated. Pour the brownie batter over the pre-baked Oreo crust.
Step 6: Bake for 25-30 minutes until a toothpick inserted into the brownie comes out slightly wet with batter still clinging slightly, or when an instant thermometer reads 180°F. Remove from oven and cool.
Step 7: For the cookie topping, roughly crush 8 Oreos by pounding them a few times inside a ziplock bag with a rolling pin. Combine crushed Oreos with 2 tablespoons powdered sugar, 1 tablespoon dutch-processed cocoa powder, and a pinch of salt.
Step 8: Drizzle 2 tablespoons melted salted butter over the cookie mixture and toss to moisten evenly. Spread on a parchment-lined baking sheet and bake for 10 minutes. Cool completely.
Step 9: For the mousse layer, melt 6 ounces milk chocolate in a microwave-safe bowl in 20-second bursts, stirring well between each until melted. Let cool for 10 minutes until about 90-100°F.
Step 10: Meanwhile, whip 1 cup cold heavy cream with 2 tablespoons dutch-processed cocoa powder, 2 tablespoons powdered sugar, and a pinch of salt using a mixer until soft peaks form.
Step 11: Stir one-third of the whipped cream into the cooled melted chocolate to lighten it. Then gently fold in the remaining whipped cream until fully combined and smooth.
Step 12: Spread the chocolate mousse evenly over the cooled brownie layer. Refrigerate for at least 3 hours or overnight to set.
Step 13: For the whipped cream topping, beat 1 cup heavy cream with 1/4 cup granulated sugar and 3 tablespoons unsweetened cocoa powder until stiff peaks form.
Step 14: Spread the cocoa whipped cream over the set pie. Sprinkle the cooled cookie topping pieces on top before serving.

Tips & Variations

Use high-quality bittersweet and milk chocolate for the best depth of flavor in the brownie and mousse layers.
For an extra fudgy brownie layer, avoid overbaking and remove the pie when the toothpick is still slightly wet.
Substitute gluten-free flour to make the pie gluten-free, but ensure your Oreos are also gluten-free.
Chill the mousse layer overnight to allow it to set fully and develop the best texture.
For a boozy twist, add a tablespoon of coffee liqueur or bourbon to the mousse mixture.

Storage

Store the Mississippi Mud Pie covered in the refrigerator for up to 3 days. The whipped cream topping may soften over time, so for best presentation, add it fresh before serving if storing longer. Leftovers can be reheated slightly at room temperature but keep refrigerated to maintain the mousse’s texture.

How to Serve

A slice of rich chocolate pie is shown on a white speckled plate, set on a white marbled surface. The pie has four visible layers: a very dark, dense chocolate crust at the bottom, a thick and smooth dark chocolate filling above it, a lighter, creamy and fluffy chocolate mousse layer next, and finally a topping of crumbly dark chocolate cookie pieces scattered on top. In the background, another slice of pie and the rest of the pie sit slightly blurred. A woman's hand is partially visible near the foreground with silver utensils nearby. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I make this pie ahead of time?

Yes, this pie actually benefits from chilling overnight to allow the mousse layer to set and the flavors to meld beautifully.

Can I freeze Mississippi Mud Pie?

You can freeze the pie for up to 1 month. Wrap it tightly in plastic wrap and aluminum foil. Thaw overnight in the refrigerator before serving and add the whipped cream topping fresh.