01 -
Preheat the oven to 325°F and line 2 cupcake tins with liners or spray a mini cheesecake pan with nonstick spray. Line 18 cups.
02 -
Blitz the Oreo cookies in a food processor until fine crumbs form. Add melted butter and blend again until well-combined. Press about 1 1/2 teaspoons of crust mixture into each prepared cup.
03 -
Bake the crusts for 5 minutes. Remove from oven and set aside to cool.
04 -
Using a stand mixer with a paddle attachment, beat the cream cheese for 2-3 minutes until smooth, scraping the sides as needed. Add sugar, peanut butter, sour cream, flour (or cornstarch), vanilla, and salt. Mix until smooth. Add eggs one at a time on low speed, mixing until just combined. Do not overmix.
05 -
Fill each prepared cup with the cheesecake mixture, covering the prebaked crust. Bake for 16-18 minutes, or until the centers have a slight jiggle. Remove from oven and allow to cool completely. Chill in the refrigerator for at least 4 hours or overnight.
06 -
Combine chocolate chips, butter, and corn syrup in a microwave-safe bowl. Heat in 30-second intervals, stirring in between, until fully melted and smooth. Stir in vanilla extract.
07 -
Spoon ganache over the chilled cheesecakes. Top each cheesecake bite with half a mini peanut butter cup. Sprinkle with flaky sea salt if desired. Chill until ganache is set.