Mississippi Mud Pie with Chocolate Mousse Layers

Why You’ll Love This Mississippi Mud Pie

This Mississippi mud pie stacks an Oreo crust, a chocolate brownie layer, a cookie crumb topping, chocolate mousse, and chocolate whipped cream. Each layer has a different texture, from the firm cookie base to the soft mousse. Because the pie needs time to chill, it is a useful make-ahead dessert.

Plan the Layers Before You Begin

Prepare and chill the crust, bake the brownie layer inside it, and let the pie cool before adding the cookie topping and mousse. Finish with chocolate whipped cream just before serving. The supplied directions do not state a baking temperature or time for the brownie layer; confirm those details in the WP Tasty recipe card before baking.

How to Make Mississippi Mud Pie

Make the crust first, then bake the brownie layer inside the crust. Add the cookie topping while the pie cools. Prepare the mousse and spread it on the cooled pie. Finish with the chocolate whipped cream. Chill the pie so layers set before you serve it.

Ingredients

• 25 Oreo cookies, finely crushed
• 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, chopped
• 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

Directions

• Crust

  • Mix 25 crushed Oreos with 6 tablespoons melted butter.
  • Press the mix into a 9-inch pie pan to form a firm crust.
  • Chill the crust while you make the brownie batter.

• Brownie Layer

  • Melt 4 ounces bittersweet chocolate with 3 tablespoons melted butter and 3 tablespoons vegetable oil until smooth.
  • Stir in 2 tablespoons unsweetened cocoa powder and 2/3 cup light brown sugar.
  • Beat in 2 large eggs, one at a time. Add 2 teaspoons vanilla and 1/4 teaspoon salt.
  • Fold in 3 tablespoons all-purpose flour until just mixed.
  • Pour the batter into the chilled crust and bake until set. Let it cool.

• Cookie Topping

  • Chop 8 Oreo cookies and mix with 2 tablespoons powdered sugar, 1 tablespoon dutch-processed cocoa powder, a pinch of salt, and 2 tablespoons melted butter.
  • Spread the cookie mix over the cooled brownie layer.

• Mousse Layer

  • Melt 6 ounces milk chocolate and let it cool slightly.
  • Whip 1 cup cold heavy cream until soft peaks form.
  • Fold the cooled melted chocolate into the whipped cream gently.
  • Spread the mousse over the cookie topping and chill until firm.

• Chocolate Whipped Cream

  • Whip 1 cup heavy cream with 1/4 cup granulated sugar and 3 tablespoons unsweetened cocoa powder to soft peaks.
  • Pipe or spread this whipped cream on top of the chilled pie before serving.

How to Serve Mississippi Mud Pie

Serve the pie chilled and slice it with a sharp knife, wiping the blade between cuts for neater layers. Add cocoa or cookie crumbs on top, or serve with a small scoop of vanilla ice cream.

How to Store Mississippi Mud Pie

Cover the pie and refrigerate it for up to 3 days. To freeze, wrap it tightly in plastic wrap and foil for up to 1 month. Thaw overnight in the refrigerator before serving.

Tips for Mississippi Mud Pie

• Warm a sharp knife in hot water and wipe it dry between slices for cleaner cuts.
• Let the brownie layer cool and chill the mousse layer before adding the next component.
• Fold whipped cream gently to keep the mousse light.
• Taste and adjust sugar if your chocolate is very bitter.

Variations

• Make a nutty version: add chopped toasted pecans to the cookie topping.
• Make it faster: use store-bought brownie mix for the brownie layer.
• Make it boozy: add 1 tablespoon of coffee liqueur to melted chocolate for the mousse.

Frequently Asked Questions

Can I make Mississippi mud pie ahead?
Yes. Make it a day ahead and keep it chilled so the mousse and whipped cream layers can firm up.

Can I use natural cocoa instead of Dutch-process cocoa?
Yes, though the flavor may be sharper. Use the type specified in each layer where possible.

How can I keep the mousse light?
Fold the cooled melted chocolate gently into the whipped cream and stop once it is evenly combined.

Can I use low-fat cream?
Heavy cream is needed for the whipped layers to hold their shape; lower-fat cream may not whip to the same volume.

Can I use a springform pan?
Yes. A springform pan can make it easier to release and serve taller slices.

For another chocolate dessert, try our German chocolate cake. Because this pie contains egg-rich layers, review the FoodSafety.gov cold storage chart for general storage guidance; confirm the brownie baking time and temperature in the recipe card.

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