01 -
Grease a 9-inch springform pan thoroughly to ensure easy release of the finished cake.
02 -
Combine graham cracker crumbs with melted butter until evenly coated. Press mixture firmly and evenly into the bottom of the pan using the base of a glass to compact it.
03 -
Spread the melted dark chocolate evenly over the crust layer. Chill in the refrigerator for 10 minutes to allow the chocolate to firm up.
04 -
Beat softened cream cheese and granulated sugar using an electric mixer on medium speed until smooth and creamy, approximately 3 minutes. Add eggs one at a time, mixing thoroughly after each addition. Incorporate vanilla extract, sour cream, and heavy cream, mixing until just combined to prevent incorporating air.
05 -
Pour the filling gently over the chilled crust and smooth the top. Bake at 325°F (163°C) in the center of the oven for 55 to 65 minutes, until the edges appear set but the center still has a slight jiggle.
06 -
Turn off the oven and crack the door open. Let the cheesecake cool inside the oven for one hour to prevent cracking.
07 -
Heat heavy cream in a small saucepan until hot but not boiling. Pour over dark chocolate chips in a heatproof bowl and let sit for 2 minutes. Stir gently to form a smooth glossy ganache.
08 -
Once the cheesecake is completely cooled, spread the ganache evenly over the top with a spatula. Refrigerate for at least 4 hours or overnight to set the ganache and meld flavors.