Yes chicken soup can be used as broth. More than likely the soup will already have salt in it so if your recipe calls for extra salt you might not need as much. Just add in seasonings and salt...
There are three main types of ingredients in miso soup: Dashi - soup stock made from katsuobushi fish flakes and kombu kelp Vegetables like daikon radish, potatoes, turnip, leek or leafy greens (also...