Step 1: Make the Caramel Sauce

• In a medium saucepan, combine brown sugar, heavy cream, and butter over medium heat. Stir constantly until thickened, about 5–7 minutes.
• Remove from heat and stir in vanilla extract and salt (if using unsalted butter).
• Set aside to cool completely.

Step 2: Prepare the Biscoff Cookie Crust

• Preheat the oven to 325°F (165°C). Grease a 9-inch springform pan.
• In a bowl, mix crushed Biscoff cookies, chopped pecans, brown sugar, and melted butter until the mixture resembles wet sand.
• Press the mixture firmly into the bottom and slightly up the sides of the springform pan.
• Bake for 10 minutes. Remove and let cool completely.

Step 3: Make the Cheesecake Filling

• In a large mixing bowl, beat the cream cheese with a hand or stand mixer until smooth and creamy.
• Add caramel sauce, granulated sugar, and brown sugar. Mix until fully combined.
• Add the eggs one at a time, mixing on low speed until just incorporated. Avoid overmixing.
• Mix in vanilla extract and sour cream until smooth.

Step 4: Bake the Cheesecake

• Pour the cheesecake filling over the cooled Biscoff crust. Spread it evenly.
• Wrap the bottom of the springform pan tightly in aluminum foil. Place the pan in a large roasting dish and fill the dish with hot water until it reaches halfway up the sides of the pan.
• Bake at 325°F (165°C) for 60–70 minutes, or until the edges are set and the center has a slight jiggle.
• Turn off the oven, crack the door open, and let the cheesecake cool inside for 1 hour.
• Remove from the water bath and refrigerate for at least 4 hours or overnight.

Step 5: Make the Chocolate Ganache

• Heat the heavy cream in a saucepan or microwave until just before boiling.
• Pour the hot cream over the chocolate chips in a bowl. Let sit for 1 minute, then stir until smooth and glossy.

Step 6: Assemble the Cheesecake

• Pour the cooled caramel sauce evenly over the top of the chilled cheesecake.
• Drizzle chocolate ganache over the caramel layer.
• Sprinkle chopped pecans on top.
• Slice and serve this masterpiece to your delighted guests!