How long should you cook hamburgers on a George Foreman grill?

Cook Hamburgers on a George Foreman grill for about 4 to 6 minutes, depending on the thickness of the patties and your desired doneness. For medium burgers, aim for an internal temperature of 160°F (71°C). Always preheat the grill for optimal cooking results, and ensure the lid is closed during cooking for even heat distribution.