We tried three different shells and this was definitely the most successful. Press shell into a ball of dough then gather dough around the shell.
I was pretty impressed at the amount of detail that the cookies had after baking. I also tried adding some arrowroot to half of the batch to see if it helped with detail in the shells. It didn't really make a difference in the appearance of the cookies but we did not like the way that they tasted as much as the ones without it.
It was a fun project to let this one get her hands into in the kitchen.
note: I used coconut oil to replace the applesauce in the recipe.