In a large mixing bowl, combine the cream cheese, sugar, vanilla extract, and salt. Mix on low using a hand mixer or a large metal whisk until the mixture is smooth and creamy.
Add the Biscoff spread and mix until the mixture is thoroughly combined.
Add the eggs one at a time, mixing well after each addition.
Mix in the heavy cream until the filling is smooth and well incorporated.
Pour the filling over the chilled crust in the springform pan.
Place a small baking dish with hot water on the bottom rack of the oven. Bake the cheesecake in the middle of the oven for about 70 min, or until the edges are slightly puffed and the center is still jiggly.
Turn off the oven and crack open the door. Allow the cheesecake to cool inside the oven for 20 minutes. Then, remove it from the oven and let it cool to room temperature before transferring it to the refrigerator. Chill the cheesecake for 5-6 hours or overnight.