Oyster sauce is not an oil but the broth left after cooking oysters, which is filtered and concentrated to make it.It is a nutritious and delicious seasoning with a rich flavor.It is a traditional ingredient for adding freshness in Cantonese cuisine.

Oyster sauce can be categorized into two types based on processing methods: one from driedoystersand another from fresh oysters.The juice from the former is made by crushing and grinding the meat of fresh oysters, then boiling it down.Additionally, depending on seasoning, there are salty and mild varieties of oyster sauce.