Gather your ingredients. Preheat the oven to 350°F. Wrap heavy-duty aluminum foil tightly around the bottom of a 9-inch springform pan. Spray inside of the pan with non-stick vegetable spray or Wilton cake release
Crush the graham crackers. Melt the chocolate together and cool.
In a small bowl, combine graham cracker crumbs and brown sugar.
Stir in butter. Press crumb mixture in the bottom of the pan and 1 inch up the sides. Bake crust at 350°F for 10 minutes. Cool.
In the bowl of your electric stand mixer (or hand mixer), beat cream cheese until smooth. Beat in cooled chocolate, brown sugar, and cocoa. Add eggs, one at a time. Beat on low speed until just combined. Stir in Bourbon and vanilla extract.
Pour into crust.
Place 1-inch water in a large pan, I use a 9x13 cake pan. Place it on the bottom rack. Place springform pan on the rack directly above the water.
Bake at 350°F for 50 to 55 minutes or until the center is just set and the top appears matte not shiny. Remove the cheesecake and cool on a wire rack for 10 minutes. Carefully run a knife around the edge of the pan to loosen; cool 1 hour longer. Refrigerate a minimum of 4 hours or overnight before cutting.
Remove sides of the springform pan and gently remove the cheesecake.
In a large saucepan, combine all the topping ingredients except Bourbon. Bring to a boil over medium heat; cook and stir for 3 - 5 minutes. Cool. Stir in the Bourbon.
Spread topping over the cheesecake. Refrigerate until ready to serve.