Vegan oyster sauce as a condiment not only has the effect of normal oyster sauce to bring freshness to dishes, but also has no preservatives, no added coloring, low salt content, about 35% lower than normal soy sauce, and most importantly, no artificial use of monosodium glutamate as a brightening agent, making it much healthier than normal oyster sauce. Vegetarian oyster sauce has not only a fresh mushroom aroma, but also a sweet and fresh soy sauce aroma, which is healthy and delicious and enjoyed by many cooking enthusiasts.