Oyster sauce is traditionally made with oyster extract and wheat flour, but this one is made with corn starch instead of wheat, which makes it gluten free. Oyster Sauce should be a stock ingredient in your Thai kitchen and Lee Kum Kee is one of the best brands available because it is made from authentic oyster extract, not imitation. Its intensely salty flavor, and velvet texture, adds a handsome brown color to stir-fry noodles and vegetables. Try it with broccoli, rapini, brussel sprouts, bok choy, or Chinese broccoli ('gai lahn'). This sauce instantly improves the flavour of chicken, fish, shrimp, meats, soups, gravies and all vegetables. A common seasoning for many Asian stir fry dishes. Ideal for all seasoning purposes. This is a truly premium brand, the manufacturer has decades of experience producing Thailand's finest stir-fry sauce. This product has the prestigious Shell Shuan Shim award (which is similar to the Michelin stars awarded here). Oyster sauce is made by boiling oysters, seasoning, and raw soy sauce.