Description
This decadent Mississippi Mud Pie features a crunchy Oreo crust, a rich and fudgy brownie layer, a smooth chocolate mousse topping, and a crunchy Oreo crumble finish. Perfect for chocolate lovers, this dessert combines multiple textures and intense chocolate flavors, chilled to set into a luscious pie that’s sure to impress.
Ingredients
Scale
Oreo Crust
- 16 Oreo cookies
- 1 tablespoon granulated sugar
- 4 tablespoons unsalted butter, melted and cooled
Brownie Layer
- 4 ounces bittersweet chocolate, finely chopped
- 3 tablespoons unsalted butter
- 3 tablespoons vegetable oil
- 1 ½ tablespoons unsweetened cocoa powder
- ⅔ cup dark brown sugar, firmly packed
- 2 large eggs, room temperature
- 2 teaspoons vanilla extract
- ¼ teaspoon salt
- 3 tablespoons all-purpose flour
Cookie Crumble Topping
- 6 Oreo cookies
- 2 tablespoons powdered sugar
- 1 tablespoon unsweetened cocoa powder
- ⅛ teaspoon salt
- 2 tablespoons unsalted butter, melted
Chocolate Mousse
- 6 ounces milk chocolate, chopped fine
- 1 cup heavy cream, very cold, divided (½ cup + ½ cup)
- 2 tablespoons unsweetened cocoa powder
- 2 tablespoons powdered sugar
- Pinch of salt
Instructions
- Prepare the Crust: Preheat the oven to 325°F (163°C). In a food processor, pulse 16 Oreo cookies into fine crumbs. Add 1 tablespoon granulated sugar and 4 tablespoons melted butter; pulse until combined. Press this mixture firmly into the bottom and up the sides of a 9-inch pie plate. Bake for 15 minutes until fragrant. Remove and cool on a wire rack.
- Prepare the Brownie Layer: In a microwave-safe bowl, combine 4 ounces chopped bittersweet chocolate, 3 tablespoons unsalted butter, 3 tablespoons vegetable oil, and 1 ½ tablespoons cocoa powder. Microwave at 50% power, stirring frequently, until melted and smooth (about 1 minute 30 seconds). In another bowl, whisk together ⅔ cup dark brown sugar, 2 large eggs, 2 teaspoons vanilla extract, and ¼ teaspoon salt until smooth. Add the melted chocolate mixture and whisk until combined. Stir in 3 tablespoons all-purpose flour until just incorporated. Pour the brownie batter into the cooled Oreo crust. Bake at 325°F (163°C) for about 15 minutes, until edges are set and a toothpick inserted in the center comes out with a thin coating of batter. Cool on a wire rack for 1 hour, then refrigerate for at least 1 hour until completely chilled.
- Prepare the Topping: In a food processor, pulse 6 Oreo cookies into coarse crumbs. Add 2 tablespoons powdered sugar, 1 tablespoon cocoa powder, and ⅛ teaspoon salt; pulse to combine. Drizzle in 2 tablespoons melted butter and pulse until the mixture resembles wet sand. Spread the crumb mixture evenly on a baking sheet. Bake at 325°F (163°C) for about 10 minutes until fragrant. Remove and cool completely.
- Prepare the Mousse: Melt 6 ounces milk chocolate in a microwave-safe bowl at 50% power, stirring frequently, until smooth. Let cool to about 85°F (29°C). In a chilled mixing bowl, whisk ½ cup heavy cream until soft peaks form; refrigerate. In another bowl, whisk the remaining ½ cup heavy cream, 2 tablespoons cocoa powder, 2 tablespoons powdered sugar, and a pinch of salt until thickened. Fold this cocoa mixture into the melted chocolate until combined. Gently fold in the whipped cream until no streaks remain.
- Assemble the Pie: Spread the chocolate mousse evenly over the chilled brownie layer. Sprinkle the cooled cookie crumble topping evenly over the mousse layer. Refrigerate the pie for at least 4 hours until set before serving.
Notes
- Use room temperature eggs to ensure better mixing for the brownie batter.
- Press the crust mixture firmly in the pie plate to avoid a crumbly crust.
- Check the brownies with a toothpick to avoid overbaking; the center should be slightly moist.
- Melt chocolate carefully at 50% power to prevent scorching.
- Chilling between steps helps the pie layers set properly for easy slicing.
- The pie keeps well refrigerated for up to 3 days.
- For added flavor, you can add a tablespoon of espresso powder to the brownie mixture to enhance the chocolate taste.
- Prep Time: 30 minutes
- Cook Time: 40 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
