Find out how long to bake chicken breasts at 400 degrees! An effortless weeknight meal is chicken breasts baked in the oven at 400 degrees. 400 degrees The ideal temperature for preparing juicy, tender, and flavorful chicken breasts is Fahrenheit. Learn how to bake chicken for the appropriate amount of time at 350 degrees, at 400 degrees, and more! How Long to Bake Chicken Breast at 400 F For 20 to 30 minutes, bake chicken breasts in a 400°F oven. This baking time is for chicken breasts that are approximately an inch thick and are boneless and skinless. As a result, the time will vary depending on the thickness of…