How to Make It
Preheat oven to 350°F. Spray a 10-inch springform pan with cooking spray and wrap the outside in several layers of aluminum foil; set aside.
Make Crust: Combine dry ingredients in a bowl. Add melted butter and mix until butter is evenly distributed. Pour into prepared pan and press evenly across the bottom of the pan.
Make the Cheesecake Layer: Combine the cream cheese and sour cream in a mixer on medium-high until fully incorporated and fluffy. Add sugar and beat to combine. Add eggs one at a time on low, waiting for the first to incorporate before adding the second. Scrape down the sides of the bowl, increase speed to medium-high and beat until fluffy. Add vanilla and flour, and mix to combine, ensuring that no pockets of flour remain. Pour mixture over prepared Crust and spread evenly to edges.
Make Pumpkin Layer: Combine all ingredients in a large bowl with a whisk until the mixture is homogenous. Gently pour over Cheesecake Layer and spread evenly to the edges of the pan.
Put the pan on a rimmed baking sheet and place in oven. Add hot water to the rimmed baking sheet so that the water comes almost completely to the lip of the baking sheet. Bake Layered Pumpkin Cheesecake for 1 hour. Turn off the oven without opening the door and allow the cheesecake to cool in the oven or 30 minutes before removing it to the counter to cool completely. Gently run a knife around the edge of the cake and transfer to the refrigerator to cool for 8 hours or overnight.