Question: how long does a chicken breast take in the oven at 400?
Answer: Make sure you use a quick read meat thermometer to get them perfectly cooked. To Bake Chicken Breast at 400°F: This will take between 22 and 26 minutes depending on the size of the chicken breasts. You can cook chicken breasts at 350°F for closer to 25-30 minutes (although I prefer the higher heat above).