01 -
Combine mayo, ketchup, and pickles in a small bowl. Chill it until you're ready.
02 -
Split the beef into three parts. Shape into discs about half an inch thick—make a small dent in the center with your thumb.
03 -
Sprinkle some salt and pepper over both sides of the patties.
04 -
Pour a cup of water at the bottom of the air fryer. Spray the basket lightly with cooking spray.
05 -
Set air fryer to 350°F and cook patties for 8 minutes. Toss on the cheese, let it melt for 1-2 extra minutes.
06 -
Pop the buns in the air fryer for one minute if you like 'em toasted.
07 -
Stack patties with sauce, lettuce, tomato, and onion between the buns.