1. Preheat the oven to 325°F and lightly grease a 9-inch springform pan.

2. Mix the crushed chocolate cookies with melted butter until fully combined.

3. Press the crust mixture firmly into the bottom of the springform pan.

4. Bake the crust for 8 minutes, then let it cool slightly.

5. Beat the softened cream cheese until completely smooth.

6. Add the sugar, sour cream, Kahlua, and vanilla extract, then mix until creamy.

7. Add the eggs one at a time, mixing on low speed just until combined.

8. Pour the cheesecake filling over the prepared crust and smooth the top.

9. Bake for 50 to 60 minutes, until the edges are set and the center still has a slight jiggle.

10. Turn off the oven, crack the door, and let the cheesecake cool for 1 hour.

11. Transfer the cheesecake to the refrigerator and chill for at least 6 hours or overnight.

12. Heat the heavy cream until hot, then pour it over the chopped semisweet chocolate.

13. Let it sit for 2 minutes, then stir until smooth to make the ganache.

14. Spread the ganache over the chilled cheesecake.

15. Chill again for 20 to 30 minutes before slicing and serving.