Heir to the Kaelin’s original cheeseburger, the 80/20 burger is fashioned from a five-cut beef blend. July 31, 2018 750 × 750 80/20 @ Kaelin’s makes the old tradition new again Heir to the Kaelin’s original cheeseburger, the 80/20 burger is fashioned from a five-cut beef blend. Heir to the Kaelin’s original cheeseburger, the 80/20 burger is fashioned from a five-cut beef blend.