Adapted from original flourless peanut butter cookie recipe on the celiac listserv (originator unknown).
Do not use low-fat peanut butter; the cookies will not turn out properly. I use Jif (all are gluten free), but it’s my understanding that Peter Pan (all), Planters (Creamy and Crunchy), Reeses, and Skippy (Creamy, Crunchy, Super Crunchy, Roasted Honey Nut) are also gluten free. (Remember to always check labels.) One reader/tester successfully made the "all peanut butter" version using natural peanut butter, but advises that you must press them down a bit before baking for them to spread enough. Using a fork or the bottom of glass will work. Ensure your vanilla is gluten free. I make my own vanilla extract, but most are gluten free (e.g., McCormick’s). (Incidentally, homemade vanilla extract is a great gift idea and now is the time to start making it for holiday gifts.)
Recipe by gfe--gluten free easily at https://glutenfreeeasily.com/gluten-free-cookie-smores/