Preheat air fryer to 390 degrees.
Place marshmallow halves cut side down on graham crackers. Press the marshmallow so it sticks to the cracker.
Place both graham crackers into the air fryer both the one with the marshmallow and the one without. Close and cook for 1 1/2 minute. until the marshmallow is golden brown.
Remove the graham cracker with the marshmallow. Place a piece of chocolate on the second graham cracker. Return the chocolate graham cracker to the air fryer for about 30 seconds until the chocolate is melting but not burned.
Press the graham crackers together and serve immediately.
