01 -
Grease a 9-inch springform pan thoroughly to ensure easy release of the cheesecake.
02 -
Combine graham cracker crumbs and melted butter until evenly coated. Press the mixture firmly into the bottom of the pan, compressing with the base of a glass for a compact crust.
03 -
Spread melted dark chocolate evenly over the crust. Refrigerate for 10 minutes to allow the chocolate to set.
04 -
Using an electric mixer, beat softened cream cheese and sugar on medium speed until smooth and creamy, about 3 minutes. Add eggs one at a time, blending fully after each addition. Incorporate vanilla extract, sour cream, and heavy cream, mixing just until combined to avoid air incorporation.
05 -
Pour the filling over the chilled chocolate crust, smoothing the top with a spatula. Bake on the center rack of a 325°F oven for 55 to 65 minutes until the edges are set and the center jiggles slightly.
06 -
After baking, turn off the oven and crack the door open. Leave the cheesecake inside for 1 hour to cool gradually, preventing cracks.
07 -
Heat heavy cream in a small saucepan until hot but not boiling. Pour over dark chocolate chips in a heatproof bowl and let stand for 2 minutes. Stir until smooth and glossy.
08 -
Spread ganache thickly and evenly over the fully cooled cheesecake. Refrigerate for at least 4 hours or overnight to set and meld flavors.