Make this rich, layered Mississippi Mud Pie featuring a crunchy Oreo crust, creamy chocolate filling, and light whipped topping. It is a simple, showstopping Southern dessert.
Prepare the crust: Combine the chocolate cookie crumbs and melted butter in a bowl. Press the mixture firmly into the bottom and up the sides of a 9-inch pie plate. Place the crust in the freezer while you prepare the filling.
Make the cream cheese layer: In a medium bowl, beat the softened cream cheese until smooth. Gradually beat in the powdered sugar and 1 teaspoon of vanilla extract until combined. Gently fold in half of the thawed whipped topping until just blended. Spread this mixture evenly over the chilled crust.
Make the chocolate pudding layer: In a separate bowl, whisk together the instant chocolate pudding mix and cold milk for 2 minutes, until the mixture begins to thicken. Pour the pudding mixture over the cream cheese layer.
Prepare the topping: In a clean bowl, beat the heavy cream and granulated sugar with an electric mixer until soft peaks form. Beat in the remaining 1/2 teaspoon of vanilla extract. Gently fold in the remaining half of the original thawed whipped topping.
Assemble the pie: Spread the whipped topping mixture over the pudding layer. If using, sprinkle the mini marshmallows evenly over the top.
Chill: Cover the pie loosely with plastic wrap and refrigerate for at least 6 hours, or preferably overnight, until the pie is firm.
Serve: Before serving, garnish the top with chocolate shavings. Slice and serve this ultimate mud pie cold.
Notes
For a fudgier crust, use the entire Oreo cookie, including the cream filling, when crushing the cookies.
If you prefer a slightly firmer filling, you can use a box of regular chocolate mousse mix instead of instant pudding, following package directions for a thicker set.
This is a no-bake dessert, so chilling time is essential for structure. Do not rush the chilling process.