01 - Preheat oven to 325°F. Line a 9-inch square baking pan with parchment paper, allowing overhang on opposite sides for easy removal.
02 - Combine crushed chocolate sandwich cookies with melted butter in a medium bowl. Mix until evenly moistened. Press firmly into the bottom of the prepared pan. Bake for 8 minutes, then set aside to cool slightly.
03 - Beat softened cream cheese and granulated sugar in a large bowl until completely smooth and creamy, about 2-3 minutes. Add sour cream, eggs, peppermint extract, vanilla extract, and food coloring if using. Mix until fully incorporated and smooth, scraping down the sides as needed.
04 - Gently fold mini chocolate chips into the cheesecake batter using a rubber spatula until evenly distributed.
05 - Pour the cheesecake mixture over the prepared crust. Smooth the top with an offset spatula. Bake for 30-32 minutes, or until the edges are set but the center still has a slight jiggle. Avoid overbaking.
06 - Remove from oven and let cool completely at room temperature, about 1 hour. Refrigerate for at least 2 hours or until fully chilled and firm.
07 - Lift the bars from the pan using the parchment paper overhang. Cut into 16 equal squares. Garnish with additional mini chocolate chips and fresh mint leaves if desired.