Place one tortilla on a flat surface. Using a biscuit cutter (or even a small drinking glass), cut three circles in the tortilla, being careful not to overlap. Repeat with each tortilla until you use up your tortillas.
Preheat the air fryer to 350 degrees F; preheat for 3-5 minutes using the air fryer setting. Fold a piece of foil into three separate sections, pinching the ends to make a sort of “ taco holder.” Place the foil inside the air fryer basket.
In a small bowl, crack one egg. Mix the graham cracker crumbs, cinnamon, and remaining granulated sugar in a separate bowl. Dip a tortilla circle into the egg, letting any excess drip off in the egg bowl. Then dip it into the graham cracker crumb mixture, ensuring it’s fully coated.
Without touching the sides together, fold the sides up together like a taco shell. Place the folded tortilla into one of the sections you made in the foil. Repeat until you have 4-6 taco shells sitting in the foil. None of these should overlap, but it is ok if they touch. Place the foil into the air fryer basket, and cook for about 8-12 minutes.
When they are golden brown and crispy, you can remove them from the heat and place them on a cookie rack to cool. Repeat until you’ve cooked all of the tortillas!
Allow the shells to cool completely before filling.