Bake pie crust according to package directions. Let cool completely.
Place chocolate chunks in a food processor and grind almost to a powder.
In a large mixing bowl combine softened cream cheese, powdered sugar, and using an electric mixer combine completely.
Add ground chocolate chunks, sugar and melted butter and using the electric mixer combine completely.
Melt peanut butter in a microwave, about 1 minute.
When pie crust is completely cooled pour melted peanut butter into the pie crust and spread it evenly over the bottom and sides of the crust with a rubber spatula. After peanut butter is spread and smoothed out, place in refrigerator for 20 minutes until peanut butter is set or in the freezer for 5 minutes.
Once peanut butter is set, spoon the cream cheese and chocolate mixture evenly over the top of the peanut butter.
Drizzle the top of the pie with the caramel ice cream topping.
Cover and refrigerate for at least 30 minutes before serving.