Season both sides of hamburger patties with desired amount of salt and pepper.
Place burgers inside of air fryer, making sure not to overlap the burgers. (We don't use non-stick spray due to the air fryer having a non-stick coating.)
Set air fryer temperature to 400° and the timer to 10 minutes.
OPTIONAL: Once the timer is up, assemble burgers on to buns with a slice of cheese and place back in to the warm air fryer for an additional minute to steam and toast the burgers. (Do not turn the air fryer on, as it may cause the buns and cheese to blow around and not melt/toast together.)