How long do you have to bake skinless chicken breasts?

Skinless boneless chicken breasts typically take 15-20 minutes to bake at 400 °F (200 °C). The exact cooking time will depend on the thickness of the chicken breasts. To ensure the chicken is cooked thoroughly, use a meat thermometer to check the internal temperature. The chicken is done when it reaches an internal temperature of 165 °F (74 °C).