Prepare. Preheat your oven to 350f. Also, prep your pie dish for nonstick. A simple spray can work.
Crust. To make the crust, in a medium bowl or food processor, combine together the crushed cookies with the melted butter. When the mixture resembles 'sand' you can transfer it to your prepared dish and press them into dish to form the crust. I find that the backside of a tablespoon can help with this. Bake the crust for 10 minutes to set.
Cream. In a large mixing bowl, beat together the softened cream cheese with the peanut butter until smooth and creamy. You may need to scrape down the sides of the mixing bowl a few times.
Mix. Add the powdered sugar to the mixing bowl and beat until incorporated. Lastly, use a rubber spatula or similar item to fold in the whipped topping until smooth and fully combined.
Set. Evenly spread the mixture from the mixing bowl over the pie crust. Then refrigerate the pie until set (about four hours or so).
Serve. Before serving, in a microwave-safe bowl or cup, melt the chocolate chips, stopping to stir every 30 seconds, until smooth and melted. Then use a spoon to drizzle the melted chocolate over the set peanut butter pie. Slice the pie as desired and serve.