1-First, preheat your oven to 350°F and adjust the rack to the middle position. Line the bottom and sides of a 9-inch springform pan with parchment or foil, lightly coat with nonstick spray, and wrap the outside bottom with foil to prevent leaks. Combine the graham cracker crumbs, ground pecans, light brown sugar, and melted butter until the mixture resembles wet sand, then press it firmly into the bottom and at least ¾ of the way up the sides of the pan. Bake the crust for 10 minutes, then set it aside to cool while you reduce the oven temperature to 300°F.

2-Next, in a large bowl, beat the cream cheese on medium speed until smooth, then mix in the granulated sugar, sour cream, vanilla extract, and salt until combined. For low-calorie versions, use reduced-fat cream cheese and sugar substitutes at this stage. Gently fold in the eggs to avoid incorporating excess air, which helps keep the cheesecake smooth.

3-Spread the filling evenly over the cooled crust and bake for 40 minutes, or until just set. While the cheesecake bakes, prepare the topping by combining the light brown sugar, dark corn syrup, rum or bourbon, and butter in a pan; stir constantly over medium heat until it boils, then boil for 2 minutes. Remove from heat and let it cool slightly before whisking together the eggs, salt, and heavy cream, then gradually whisk this into the syrup mixture until smooth and stir in the chopped pecans.

4-Once the cheesecake is out of the oven, spoon the pecans evenly over the top and add just enough syrup to fill the crust without overflowing. Return to the oven and bake for 40 to 50 minutes, or until the topping is golden brown and crisp; if the edges brown too quickly, cover with foil. For gluten-free or vegan needs, substitute ingredients accordingly as you go. Allow the cheesecake to cool to room temperature, then refrigerate for at least 4 hours or overnight before serving to help flavors meld and improve texture.