In a large mixing bowl, combine the crushed Biscoff cookies and softened cream cheese. Mix until fully combined and the mixture is smooth.
Add the Biscoff spread to the mixture, continuing to mix until well incorporated. The mixture should be thick and easy to mold.
Using your hands, scoop out small portions of the mixture and roll them into balls, about 2.5 cm in diameter. Place the truffles on a lined baking sheet.
Once all the mixture is formed into balls, place the baking sheet in the refrigerator for about 30 minutes to set.
After chilling, dip each truffle into the melted dark chocolate, allowing excess chocolate to drip off. Place back on the lined baking sheet.
While the dark chocolate is still wet, sprinkle some extra crushed Biscoff cookies on top of each truffle, and finish by drizzling melted white chocolate over them.
Chill the truffles again for about 15 minutes to allow the chocolate to set.
Once set, serve the truffles on a festive platter, and enjoy!