Mix together the cinnamon and sugar in a shallow bowl or dish.
Unroll the can of crescent roll dough. Then, lightly spray the air fryer basket, or use air fryer parchment paper or a silicone liner.
Dip and cover the marshmallows in the melted butter then the cinnamon sugar mixture.
Wrap the marshmallows in the crescent roll dough. You can either place the marshmallow on top of the dough then cut squares out around the marshmallows. Or, you can place the marshmallow on the wider end of the preforated triangle. Either way, wrap the dough securely around the marshmallow making sure there are no holes or leaks.
Place in the air fryer basket and cook for6 to 8 minutes at 350˚F/175˚C, or until the dough is golden brown.