Doubanjiang, also known as douban, toban-djan, broad bean chili sauce, or fermented chili bean paste, is a hot and savoury Chinese bean paste made from fermented broad beans, chili peppers, soybeans, salt and flour. Characteristically used in Sichuan cuisine, it has been called "the soul of Sichuan cuisine." Sichuan dishes such as mapo tofu, huoguo, the Yuxiang flavour profile, and Shuizhu all use doubanjiang as a key ingredient. Other regions have their own versions: in Guangdong and Taiwan, for instance, the Sichuan doubanjiang is called la-doubanjiang to distinguish it from local non-spicy versions.

Vicia faba, commonly known as the broad bean, fava bean, or faba bean, is a species of vetch, a flowering plant in the pea and bean family Fabaceae. It is widely cultivated as a crop for human consumption, and also as a cover crop. Varieties with smaller, harder seeds that are fed to horses or other animals are called field bean, tic bean or tick bean. Horse bean, Vicia faba var. equina Pers., is a variety recognized as an accepted name. This legume is very common in Southern European, Northern European, East Asian, Latin American and North African cuisines.