Preheat your oven to 325°F (163°C). Grease a 9-inch springform pan with cooking spray or butter.
In a medium bowl, mix the graham cracker crumbs, melted butter, and 2 tablespoons of sugar until well combined.
Press the mixture firmly into the bottom of the springform pan to form the crust. Bake for 10 minutes, then remove and let cool.
In a large mixing bowl, beat the softened cream cheese on medium speed until smooth. Gradually add in 1 cup of granulated sugar and continue to beat until creamy.
Add the pumpkin puree, eggs (one at a time), vanilla extract, ground cinnamon, nutmeg, and ginger. Mix until well blended and smooth.
In a separate small bowl, mix the melted chocolate with the cocoa powder until uniform.
Pour half of the pumpkin cheesecake batter over the cooled crust in the springform pan. Spoon dollops of the chocolate mixture over the batter.
Pour the remaining pumpkin batter over the chocolate dollops, then use a knife or toothpick to swirl the chocolate in to create a marbled effect.
Bake the cheesecake in the preheated oven for approximately 55 to 60 minutes. The center should be set but still slightly jiggly.
Turn off the oven and crack the door, letting the cheesecake cool completely in the oven to prevent cracking.
Refrigerate for at least 4 hours, or overnight for best results.
When ready to serve, run a knife around the edges of the pan before removing the sides of the springform.
Notes
Serve chilled slices on dessert plates. Garnish with whipped cream or a sprinkle of cocoa powder for an extra touch of elegance.