Pho chay is a vegan version of pho noodle soup. The broth is usually based on mushrooms, ginger, onions, soy sauce, and spices, although there are numerous variations on the dish. The spices often include cloves, cinnamon, coriander seeds, and black cardamom.

All that's left is to cook the large pho noodles, combine them with the broth, then add the toppings such as bean sprouts, tofu, large mushrooms, and sliced chili peppers. The dish can be enriched with a variety of vegetables such as leeks, carrots, pak choi, and even fruit such as apples.

Before serving, this pho variety is often sprinkled with fresh coriander and accompanied by nuoc cham fish sauce on the side (the fish sauce, however, is not vegan).