Place 1 marshmallow in the center of the basket in the air fryer.
Close the lid and set the air fryer to air crisp, 400 degrees (no preheat), for 5 minutes.
When cooking is complete, open the air fryer and remove the marshmallow and place onto your graham cracker and chocolate for s'mores, or eat as desired.
Use a spatula or two graham crackers to scoop the marshmallow from the bottom of the basket.
Do not use parchment paper, it sticks to the lid or flies up in the air fryer. Cook only 1 marshmallow at a time, multiple marshmallows will melt together. For a milder toast without browning, regular marshmallows can also be done at 350 or 400 degrees for 3 minutes.