The secret to juicy baked chicken breast? Bake for a short time at a high temperature. Baking for 30 minutes at 350 degrees will yield dry meat. But baking for just 20 minutes at 450 degrees will result in delightfully juicy baked chicken breast, every time.Baked Chicken Breast. Preheat oven to 450 degrees F. Line a baking dish with foil. 2  Spray or brush both sides of each chicken breast with olive oil, and sprinkle with the seasonings.