The USDA recommends cooking ground meat to an internal temperature of 165F degrees. However, that would result in a well done burger. Many people enjoy their patties cooked with a little pink in the center. If you like your burgers medium rare with a lot of pink in the center, cook them to 130F degrees. For medium, which is a little less pink, cook them to 135F degrees. If you like them with just a hint of pink, cook them to 145F degrees. You can check the temperature with a digital meat thermometer.