01 - Combine crushed chocolate cookie crumbs with melted butter in a mixing bowl, stirring until the mixture resembles wet sand. Press firmly and evenly into the bottom of a 9-inch springform pan. Freeze for 15 minutes to set the crust.
02 - Beat softened cream cheese, creamy peanut butter, and sifted powdered sugar in a large bowl until completely smooth and no lumps remain. Gently fold in the thawed whipped topping until just combined. Spread the filling evenly over the chilled cookie crust.
03 - Place 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 cool slightly for 2 to 3 minutes, then pour evenly over the peanut butter layer.
04 - Cover the pan tightly with plastic wrap and refrigerate for at least 4 hours, or preferably overnight, until all layers are firmly set.
05 - Spread the remaining whipped topping evenly over the set chocolate layer. Garnish with chopped roasted peanuts and chocolate shavings if desired.
06 - Cut into squares or wedges using a sharp knife. Serve chilled for the best texture and flavor.