1. Preheat the oven to 350°F. Line an 8-inch square pan with parchment, leaving an overhang.
2. Pulse graham crackers in a food processor; add butter and pulse until moistened.
3. Press mixture into the pan and bake for 10 minutes. Cool completely.
4. Beat cream cheese, sugar, and pumpkin until smooth. Add eggs one at a time, mixing well.
5. Add flour, spices, and salt; mix until combined.
6. Melt chocolate in the microwave, stirring until smooth.
7. Mix 1 cup of the cheesecake batter with melted chocolate.
8. Pour pumpkin batter over crust; drop dollops of chocolate batter on top.
9. Swirl with a knife and bake for 40 minutes. Cool, then chill for 4 hours.