Woh Hup shitake mushroom vegetarian oyster flavoured sauce is the most popular cooking sauce in Singapore as Woh Hup uses top quality mushroom powder to ensure the aromatic flavour and healthy for consumption and another quality product made with 100 percent vegetarian ingredients. In cooking, a sauce is liquid, cream or semi-solid food served on or used in preparing other foods. They add flavour, moisture, and visual appeal to another dish. Oyster sauce is a thick, brown sauce made from fresh oysters which are cooked and subsequently processed with soy sauce, salt and spices to make into a starchy caramel liquid. Woh Hup Oyster Sauce Extra Flavour, a classic all-purpose seasoning is 25% lower in sodium, with the same great flavour loved by families for generations.