Step 1 — Prepare the Crust : Preheat oven to 325°F (160°C). Mix graham crumbs, sugar, melted butter, and cinnamon.Press firmly into the bottom of a 9-inch springform pan. Bake for 10 minutes, then set aside to cool.
Step 2 — Make the Filling : Beat cream cheese until smooth and fluffy. Add sugar and mix until creamy. Add pumpkin puree, sour cream, vanilla — mix gently. Add eggs one at a time, mixing just until combined. Add spices + salt — avoid overmixing to prevent cracks.
Step 3 — Bake in a Water Bath : Wrap outside of springform pan in foil. Place in a larger roasting pan. Pour boiling water halfway up the sides. Bake 60–70 minutes, until center is slightly jiggly.
Step 4 — Cool : Turn off oven, crack door, rest cheesecake inside 1 hour. Remove from water bath, cool completely, then refrigerate 4–6 hours.
Step 5 — Whipped Cream : Whip heavy cream + vanilla + sugar until soft peaks form. Pipe or spread over chilled cheesecake before serving.