To make this recipe gluten free, replace the chocolate-covered butter cookies with certified gluten-free chocolate cookies or gluten-free sandwich cookies. Also confirm that the Irish cream liqueur, mascarpone cheese, white chocolate, and dark chocolate are labeled gluten free or free from cross-contact concerns, as some brands may vary. Because cookie substitutions can affect texture, if the mixture seems too soft after mixing, chill it a little longer before scooping so the cheesecake balls hold their shape more easily.