01 - Combine the crushed chocolate sandwich cookies with melted butter in a mixing bowl, stirring until the crumbs are evenly coated. Press the mixture firmly and uniformly into the bottom of a 9-inch springform pan. Transfer to the freezer for 15 minutes to firm up.
02 - Using an electric mixer, beat the softened cream cheese, creamy peanut butter, and powdered sugar together until completely smooth and no lumps remain. Gently fold in the thawed whipped topping with a spatula. Spread the mixture evenly over the chilled cookie base.
03 - Place the semisweet chocolate chips and heavy cream in a microwave-safe bowl. Heat in 20-second intervals, stirring between each burst, until the mixture is glossy and smooth. Let it cool for a few minutes, then pour it evenly over the peanut butter layer.
04 - Cover the pan with plastic wrap and refrigerate for at least 4 hours, or preferably overnight, until all layers are fully set.
05 - Spread the remaining whipped topping evenly over the chilled chocolate layer. Garnish with chopped roasted peanuts and chocolate shavings if desired.
06 - Cut into squares or wedges using a sharp knife. Serve well chilled for the best texture and flavor.