Too bake chicken breast in the oven pre heat the oven to 400 F and then place the thawed out chicken breast in the oven for around 20 to 30 minutes.
Chicken Breast should cook fully within 30 minutes but you may have to cook the chicken breast longer if there still is some red in it.
The chicken breast should not be pink when it is fully cooked.
Another good way to tell if the Chicken breast is done is to use a meat thermometer and check for an internal temperature of 170 degrees F which means the chicken breast is fully cooked.