Checking doneness is accomplished in basically the same manner regardless of the cooking method you are using. Some methods are more accurate than others and some are more suitable in regard to the cooking method and to the cut of chicken. Shown below are the most common methods for checking doneness.
Thermometer: Using a thermometer is the most accurate method for testing doneness of the chicken. A regular meat thermometer or an instant read thermometer can be used. A regular meat thermometer is inserted before placing the chicken in the oven or other heat source and remains there throughout the cooking time.