01 - Preheat oven to 160°C (325°F). Grease a 23 cm (9-inch) springform pan and line the bottom with parchment paper.
02 - Combine crushed cookies and melted butter in a bowl. Press firmly into the bottom of the prepared pan to form an even crust. Bake for 10 minutes, then set aside to cool.
03 - In a large mixing bowl, beat cream cheese and sugar until smooth and creamy. Add sour cream, vanilla, and salt; mix to combine.
04 - Add eggs, one at a time, mixing on low speed until just incorporated. Do not overmix.
05 - Add peanut butter and mix until just blended.
06 - Fold in chopped mini peanut butter cups.
07 - Pour the batter over the cooled crust and smooth the top.
08 - Bake for 50–60 minutes, or until the center is just set and slightly wobbly. Turn off oven, crack the door, and let the cheesecake cool for 1 hour.
09 - Refrigerate for at least 4 hours, or overnight, until fully set.
10 - Before serving, drizzle melted peanut butter and chocolate sauce over the top. Sprinkle with extra chopped peanut butter cups.