How Long to Cook Chicken Breast for at 450 Degrees
On average, your chicken breast should be in the oven for 10-15 minutes at most when you've set the temperature up so high. When you're trying to determine how long to cook a chicken breast at 450 degrees, you should keep the size of the chicken breast in mind: Smaller chicken breasts will need less time, and larger ones will need a few more minutes.
For extra assurance that your chicken breasts are cooked before serving, follow an easy baked chicken breast recipe and test them with a meat thermometer. Insert it into the center of the thickest part of the largest piece and take its temperature: Once the internal temperature reaches 165 degrees Fahrenheit, you can safely eat it.