Preheat your oven to 325°F (160°C). Grease a 9-inch springform pan and line the bottom with parchment paper.
In a medium bowl, combine the chocolate cookie crumbs and melted butter. Mix until the crumbs are well-coated. Press this mixture firmly into the bottom of the prepared springform pan to create a crust. Bake for 10 minutes, then remove and set aside to cool.
In a large mixing bowl, beat the softened cream cheese with an electric mixer on medium speed until smooth and creamy. Gradually add the granulated sugar, mixing until well combined.
Add the vanilla extract and eggs, one at a time, mixing well after each addition.
Mix in the sour cream, cocoa powder, peppermint extract, and melted chocolate chips until the mixture is well combined and smooth.
Pour the cheesecake filling over the cooled crust in the springform pan, smoothing out the top with a spatula.
Bake in the preheated oven for 55-60 minutes, or until the center is set but slightly jiggly. Turn off the oven, crack the door, and let the cheesecake cool in the oven for 1 hour.
Remove the cheesecake from the oven and let it cool to room temperature. Then, refrigerate for at least 4 hours or preferably overnight to set fully.
Before serving, garnish the top with crushed peppermint candies for a festive touch.
Notes
Serve slices of the cheesecake on dessert plates, drizzling with a chocolate sauce if desired, and adding a sprig of mint for an extra pop of color.