Preheat oven to 160°C (325°F). Grease and line a 23cm (9-inch) springform pan.
For the crust: In a bowl, combine crushed Biscoff cookies and melted butter. Press mixture evenly into the bottom of the prepared springform pan.
For the filling: In a large bowl, beat cream cheese and sugar until smooth and creamy. Add eggs one at a time, beating well after each addition. Stir in heavy cream and vanilla extract.
Gently fold in the Biscoff spread until just combined. Pour the filling over the cookie crust.
Bake for 60-70 minutes, or until the edges are set and the center is still slightly wobbly. Turn off the oven and let the cheesecake cool inside the oven with the door ajar for 1 hour.
Remove from oven and let cool completely on a wire rack. Then, chill in the refrigerator for at least 4 hours, or preferably overnight.
For the topping: Gently warm the Biscoff spread until it is pourable. Drizzle over the chilled cheesecake and sprinkle with crushed Biscoff cookies.
Slice and serve.
Notes
For best results, use full-fat cream cheese and ensure all ingredients are at room temperature.