Place the chicken breasts in a 6-quart slow cooker. Spread the condensed cream of chicken soup over them and pour in the chicken broth.
Cover and cook on LOW for 6 to 7 hours, until the chicken is tender and easy to shred.
Transfer the chicken to a plate, shred with two forks, and return it to the cooker.
Stir in the frozen egg noodles. Cover and cook on HIGH for 30 to 45 minutes, stirring once or twice, until the noodles are tender and the broth has thickened.
Stir well, taste, season if desired, and serve hot.