Oyster sauce

Oyster sauce describes a number of sauces made by cooking oysters. The most common in modern use is a viscous dark brown condiment made from oyster extracts, sugar, salt and water thickened with corn starch. Some versions may be darkened with caramel, though high-quality oyster sauce is naturally dark. It is commonly used in Chinese, Thai, Malay, Vietnamese, and Khmer cuisine.