Also known as Chinese fermented black beans, douchi is an indispensable part of Chinese cuisine. The black soybeans are heavily salted and fermented, resulting in an extremely salty ingredient with a robust and pungent flavor.
They are rarely eaten plain and are usually used in classic Chinese dishes as a condiment or a seasoning. Since their taste resembles a mix of soy and fish sauce, they are often added to provide a unique flavor to Chinese culinary classics. In the cooking process, they develop a slightly sweet taste, which is a perfect match for stir-fry dishes, rice, and various Chinese sauces.
They are also common in meat dishes and classic Chinese soups, in which they enhance the freshness of other ingredients and provide a sharp background flavor. It is believed that douchi has been used in Chinese cuisine for centuries, with the earliest written mention dating back to 173 BC.