Beautiful Female Bodybuilders who do have larger muscles :

How To Design An Anabolic Diet : In order to design a diet that puts your body in an anabolic state; you must have just enough of, or more of the essential nutrients necessary to accomplish that goal.

Since women produce less testosterone than men, it's important to encourage your body to make more testosterone, while not encouraging more estrogen production, which is counter-productive to muscle building.

Limit Estrogen Products : While opinions differ on the subject: Soy products contain excessive amounts of plant estrogen and any serious female bodybuilding diet will limit the amount of soy products (including soy protein supplements).