Turn the oven down to 325°F. Prepare the cooled springform pan (with the crust) by wrapping the bottom of the pan with 2 sheets of tinfoil, then set aside.
In a large mixing bowl, or stand mixer, add the soft cream cheese and beat on low until it looks soft and creamy – about 2 minutes. Add the sugar, vanilla, and salt, and beat on low until very creamy – 3-4 minutes. While still beating on low, add the eggs and yolks, one at a time, ensuring that each egg is fully incorporated before adding the next, ensuring that you are also scraping at the bowl as necessary.
Add the cookie butter, heavy cream, Pure Pumpkin, and sour cream, then beat on low until the cheesecake filling looks creamy, smooth, and uniform. Finally, add in cornstarch, pumpkin pie spice, and cinnamon, then beat on low one last time on low until it is well-combined.
Pour the filling over top of the cooled crust in the springform pan, then place the cheesecake into a large roasting pan. Pour enough boiling water into the roasting pan so that it reaches about halfway up the outside of the springform pan. Place into the oven to bake for 1 hour and 30 minutes. When the cheesecake is done it should still be a little jiggly in the centre.
When done, lightly crack the oven open to allow the cheesecake to slowly cool for about an hour and a half. After an hour and a half, remove the cheesecake from the oven and water-bath and place onto the counter to cool to room temperature. Once at room temperature, wrap with plastic wrap and place into the fridge for at least 6 hours or preferably overnight.
Finish the cheesecake with caramel or dulce de leche on top, then serve!