Tear the insides of the bun into a mixing bowl. Add grill seasoning, garlic powder, salt, pepper, Worcestershire, and milk. Mash until a paste forms.

Break ground beef over the paste and mix well. Divide into three equal portions and form into 1-inch thick patties. Make a thumb indentation in the center of each.

Lightly brush the air fryer basket with vegetable oil. Arrange burgers in the basket, ensuring they do not touch.

Air fry at 350°F for 15-22 minutes. Check internal temperature with a meat thermometer to reach desired doneness (e.g., 160°F for medium).

For cheeseburgers, place a 1/2 slice of American cheese on each burger and air fry for an additional 30 seconds to melt.

Serve immediately on toasted brioche buns with your favorite toppings.