Bake these cookies until they are just set, not firm. That way they’ll still be soft and chewy in the middle even after they’ve cooled. We like the idea of using these to sandwich chocolate or coffee ice cream, but what would really get us excited is another secret layer of nutella inside. Spread a little nutella on the underside of each cookie. Place a scoop of ice cream on top and sandwich, nutella-side down, with another cookie. Serve with a glass of cold milk, or non-dairy alternative for a real treat.