1 cup quick-cooking rolled oats, divided
½ cup pecans, chopped
¼ cup unsalted butter, melted
1 tbsp molasses
½ tsp salt
3 (8-oz/250 g) bricks full-fat cream cheese, room temperature (filling)
¾ cup light brown sugar, packed (filling)
1 cup pumpkin puree, room temperature (filling)
1 tbsp molasses (filling)
1 tbsp vanilla extract (filling)
1 tbsp pumpkin spice, plus more for serving (filling)
1 tsp ground dried ginger (filling)
¼ tsp salt (filling)
4 large eggs, room temperature (filling)
1. For the crust, preheat oven to 350ºF. In a food processor or blender, blend ½ cup oats with pecans until finely ground. Add to a large bowl with remaining ½ cup oats (unblended), butter, molasses, and salt. Mix until combined. Press into the bottom of a 9-inch nonstick springform pan (the crust is to be thin). Bake for 15 minutes. Place on a large-rimmed baking sheet and set aside to cool completely while preparing filling.
2. For the filling, turn oven down to 300ºF. In the bowl of a stand mixer fitted with a paddle attachment or in a large bowl with a handheld mixer, beat cream cheese until smooth; scrape down sides and paddle, or scrape down beaters and beat again. Beat in brown sugar; scrape down sides and paddle, or scrape down beaters and beat again. Beat in pumpkin, molasses, vanilla, pumpkin spice, ginger, and salt; scrape down sides and paddle, or scrape down beaters and beat again. Add eggs one at a time, beating on low until incorporated. Pour mixture into prepared crust and bake for 1 hour and 15 minutes. Turn oven off and let sit for 30 minutes. Remove from oven and cool completely to room temperature; refrigerate for at least 8 hours (or preferably overnight) until cold. To serve, run a sharp knife around rim of cheesecake; unhinge pan, sprinkle very lightly with additional pumpkin spice, if desired, and slice. Serve chilled.