Skinless Boneless Chicken Breasts: Cook 20 minutes, turn over, and cook an additional 20 minutes. Bone-in Skin-on Chicken Breasts: Cook 30 minutes, turn and cook an additional 20 minutes. Chicken Wings: Cook 15 minutes, turn over, and cook 15 more minutes. Just keep in mind cook times will vary depending on the size of the chicken. This is a good rule of thumb. You can always test the chicken's doneness by using an instant-read thermometer internal temperature of 165°. Also, juices will run clear when the chicken is done.