Burgers should be cooked for four to six minutes with one to two minutes added for frozen burgers. This time frame applies to beef as well as turkey burgers.
Adjust Cooking Time as Needed
George Foreman grills cook food from both sides, so burgers cook faster than on typical outdoor grills, according to the George Foreman website. Some grills also allow users to adjust the temperature, which will change the cooking time.
Cooking times vary depending on the type of grill you own, the temperature and the thickness of burgers. Check burgers after four minutes and cook further as needed. Use a thermometer to ensure a proper internal temperature, defined as 71.1 degrees C by the U.S. Department of Agriculture.