To make this recipe gluten free, substitute the Biscoff cookies with a certified gluten-free spiced cookie or another gluten-free cookie with a similar crisp texture and caramelized flavor. Also verify that the cream cheese, milk, and white chocolate are labeled gluten free, as ingredients and manufacturing methods may vary by brand. Because cookie textures differ, add the milk gradually and only as needed to bring the mixture together into a rollable dough.