Carefully break the graham crackers in half to form 8 crackers.
Place 4 of the graham cracker squares in the bottom of an air fryer basket. Top each with one marshmallow.
Air fry at 400 degrees for 4-6 minutes or until the marshmallow is as toasted as you’d like.
Break the candy bar into equal sized pieces and immediately place over the marshmallows. Top with the remaining graham crackers.
Return to the air fryer for 30 seconds, with the air fryer turned off. The residual heat will melt the chocolate.
Enjoy immediately.
Notes
We used the large s'mores sized marshmallows in this recipe. They expand quite a bit and will be a bit messy to eat (as are all s'mores). The regular sized marshmallows don't get quite as large. Swap out the Hershey's milk chocolate for your candy bar of your choice, such as Reese's, for a fun twist.