Authentic Korean short ribs use the ‘flanken cut’, which are cut across the bone, not along the bone. They grill up sweet, tender, and delicious after some time in a sweet soy marinade. Mar26 Authentic Korean short ribs use the ‘flanken cut’, which are cut across the bone, not along the bone. They grill up sweet, tender, and delicious after some time in a sweet soy marinade.