**Prepare the Crust:** Preheat your oven to 325°F (165°C). In a mixing bowl, combine chocolate cookie crumbs and melted butter. Press the mixture firmly into the bottom of a 9-inch springform pan. Bake for 8-10 minutes. Let cool.
**Make the Cheesecake Filling:** In a large bowl, beat the cream cheese and sugar until smooth. Add peanut butter, sour cream, and vanilla extract, mixing until well combined.
**Incorporate the Eggs:** Beat in the eggs one at a time, mixing just until combined after each addition. Gently fold in the chopped Reese’s cups.
**Bake the Cheesecake:** Pour the filling over the cooled crust. Bake for 55-60 minutes, or until the edges are set and the center is slightly jiggly. Turn off the oven, crack the door, and let the cheesecake cool in the oven for 1 hour.
**Chill the Cheesecake:** Remove the cheesecake from the oven and refrigerate for at least 6 hours, preferably overnight, until fully set.
**Prepare the Ganache:** Heat the heavy cream in a saucepan or microwave until steaming, then pour over the chocolate chips. Let sit for 2 minutes, then stir until smooth.
**Top and Serve:** Pour the ganache over the chilled cheesecake, spreading it evenly. Garnish with chopped Reese’s cups. Chill for another 30 minutes before serving.