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One and a half hours is much too long to cook the chicken at 350 degrees F. The time your chicken will bake in the oven does depend on the internal temperature and the size of your chicken or chicken pieces. Generally I bake chicken at 350 degrees F. for 30 to 40 minutes.
Baking Your Chicken. 1  1. Cook your chicken breasts at 400 degrees Fahrenheit (205 degrees Celsius). Make sure your oven is completely preheated before putting the chicken in the oven. 2  2. Check the chicken's temperature regularly. Usually, it takes around 30 to 40 minutes to bake chicken breast.