Prepare the crust: In a medium bowl, use a rubber spatula to combine the ingredients until well-mixed. Use a spoon to press the crumbs up the side of a 9-inch pie plate, and use your hand to press down the bottom. Freeze until firm.
Prepare the filling: Preheat the oven to 325℉. In a large bowl, use an electric mixer to combine the cream cheese, peanut butter, sugar and eggs until well-combined. Stir in the peanut butter cups. Scrape the filling into the frozen crust. Bake until set, 30 to 35 minutes. Let cool.
When totally cool, drizzle with chocolate and more chopped peanut butter cups. Keep chilled until ready to serve.