01 - Preheat your oven to 325°F. Line a 9-inch square baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a medium bowl, combine crushed chocolate cookies and melted butter. Mix until well combined. Press firmly into the bottom of the prepared pan. Bake for 8 minutes, then set aside.
03 - In a large bowl, beat cream cheese and sugar until smooth and creamy. Add sour cream, eggs, peppermint extract, vanilla extract, and food coloring (if using). Mix until fully combined and smooth.
04 - Fold in the mini chocolate chips.
05 - Pour the cheesecake mixture over the prepared crust and smooth the top. Bake for 30–32 minutes, or until the center is just set and still slightly jiggly. Do not overbake.
06 - Remove from oven and cool completely at room temperature, then refrigerate for at least 2 hours until fully chilled.
07 - Lift the bars out of the pan using the parchment overhang. Cut into 16 squares. Garnish with extra mini chocolate chips and mint leaves, if desired.