Step 1

Preheat oven to 350 degrees (F). Line a 9x13-inch baking pan with heavy-duty aluminum foil, allowing two of the sides to overlap (you want an overhang of at least 2-inches on two sides) and spray lightly with nonstick baking spray. Set aside.

Step 2

In a large bowl combine the graham cracker crumbs, sugar, and butter and, using a rubber spatula, mix well to combine. Press the mixture into the bottom - and slightly up the sides - of the prepared pan.

Step 3

Bake the crust in preheated oven for 10 minutes. Remove the crust from the oven and set aside on a cooling rack until needed.

Step 4

Reduce the oven temperature to 325 degrees (F).

Step 5

In the body of a high power blender, food processor, stand mixer fitted with the whisk attachment, or in a large bowl using a hand held electric mixer, beat the cream cheese and sour cream until completely smooth.

Step 6

Add in both sugars and vanilla, and beat until smooth, scraping down the sides and bottom of bowl as needed. Add in the eggs and yolks and beat until combined.

Step 7

Stir in the bourbon, if using, and and beat until combined. Finally, stir in the flour, mixing just until combined.

Step 8

Pour filling on top of prepared crust, and spread evenly.

Step 9

Check to ensure your oven has cooled to 325°F, then place the pan in the oven and bake for 38 to 40 minutes, or until the edges have set and the middle is still a little jiggly. The cheesecake will firm up a lot as they cool.

Step 10

Remove the bars from the oven, and cool at room temperature for one hour. Then refrigerate for at least 3 hours, or overnight.

Step 11

In a large skillet over medium-heat, melt the butter. Add in the brown sugar and cook, stirring with a whisk, until the sugar has melted and mixture is bubbling, about 2 minutes.

Step 12

Add in the cinnamon, heavy cream, and salt and whisk to combine. Add in the pecans and, using a rubber spatula, fold them into the liquid mixture until they're completely coated. Remove from heat and stir in the vanilla and bourbon.

Step 13

Cool for 15 minutes, then scrape the mixture on top of the cheesecake. Slice and Serve.