Prep Time 25 minutes mins
Cook Time 1 hour hr 5 minutes mins
Total Time 9 hours hrs 10 minutes mins
Use full-fat block cream cheese, never whipped or low-fat, and pure pumpkin puree, never pumpkin pie filling (which is already sweetened and spiced). Room-temperature cream cheese, eggs, and sour cream are essential for a lump-free, crack-free cheesecake.
Room-temperature ingredients are non-negotiable: cold cream cheese makes lumps that no amount of beating will fix.
Do not overbeat after the eggs go in. Air bubbles rise, crack, and sink — mix on low and stop as soon as each egg disappears.
The water bath plus the slow oven cool is the crack-free combination. If a small crack appears anyway, the whipped cream topping covers it beautifully.
The cheesecake must chill at least 6 hours, overnight is better — warm cheesecake will not slice cleanly. Use a hot, dry knife, wiping between slices.
Make ahead: bake up to 2 days ahead and keep refrigerated, uncut, covered. Freeze whole (without topping) up to 1 month; thaw overnight in the fridge.