Prepare the Crust: Crush Biscoff cookies into fine crumbs using a food processor or a zip-top bag and rolling pin. Combine the crumbs with melted butter and mix well. Press the mixture firmly into the bottom of a 9-inch springform pan. Refrigerate while preparing the filling.
Make the Filling: In a large bowl, beat the softened cream cheese until smooth. Gradually add powdered sugar and Biscoff spread, mixing until well combined. In a separate bowl, whip heavy cream until stiff peaks form. Gently fold the whipped cream into the cream cheese mixture along with the vanilla extract.
Assemble the Cheesecake: Pour the filling over the chilled crust and smooth the top. Drizzle with additional Biscoff spread, if desired. Cover and refrigerate for at least 4-6 hours, or preferably overnight, to set completely.
Serve: Release the sides of the springform pan and slice the cheesecake. Garnish with crushed Biscoff cookies, chocolate sauce, or caramel sauce, if desired.