Preheat the air fryer to 375°F
Form ground beef into patties about 1/2 to 3/4 inch thick
Season both sides with salt and pepper
Make a small indentation in the center of each patty
Place patties in the air fryer basket in a single layer
Cook for 8 to 10 minutes for medium, flipping halfway through
Cook for 10 to 12 minutes for well done, flipping halfway through
Add cheese during the last 1 to 2 minutes if desired
Check that the internal temperature reaches 160°F for ground beef
Remove patties and let them rest for a few minutes
Serve on buns with desired toppings