Mix: Combine peanut butter, egg, and sugar thoroughly in a mixing bowl

Prep: Line air fryer basket with parchment paper

Shape: Using a 1-inch cookie scoop, portion dough onto parchment paper and create crosshatch pattern with fork

Bake: Air fry at 400°F / 204°C for 4-5 minutes until lightly golden brown

Cool: Let cookies cool in basket for a few minutes before transferring to cooling rack

Serve: Enjoy with a glass of milk or scoop of ice cream if desired