Line a tray or baking sheet with parchment paper and set aside.
Place the Biscoff cookies in a food processor and blend until fine crumbs form.
Reserve 1 tablespoon of the crumbs for decorating later.
Add the cream cheese or mascarpone to the remaining cookie crumbs and process until a thick dough-like mixture forms.
Scoop portions of the mixture using a small cookie scoop, melon baller, or teaspoons.
Roll each portion into a smooth ball and place on the prepared tray.
Transfer the tray to the freezer and chill for about 30 minutes until firm.
Melt the white chocolate in a heat-safe bowl, stirring until smooth.
In a separate small bowl, gently warm the Biscoff spread until it becomes pourable.
Remove the chilled truffles from the freezer.
Dip each truffle into the melted white chocolate, ensuring it is completely coated.
Place the coated truffles onto a clean parchment-lined tray.
Drizzle a small amount of melted Biscoff spread over each truffle.
Sprinkle with the reserved cookie crumbs before the coating sets.
Refrigerate for at least 1 hour, or until fully firm.
Serve chilled or allow to sit at room temperature for a few minutes before enjoying.