Frozen chicken breast grilling time is dependent on cut size and thickness. Chicken breast should be cooked until the internal temperature reaches 165°F. Frozen chicken takes about 50% longer to cook than thawed chicken, typically around 30-45 minutes.

You can grill chicken from frozen. You will need to preheat your grill to a lower heat than you would for defrosted chicken and increase cook time by about 50%. Always check chicken with a food thermometer. Chicken breast should be cooked until the internal temperature reaches 165°F.