Chinese fermented black beans (known in Cantonese as dou si) are powerful little umami bombs - they add an intense, rich savouriness to whatever they're cooked with. They are made from soy beans ...

You can buy fermented black beans in Asian grocers or supermarkets to make your own black bean sauce. They are preserved in salt and should be rinsed well before using. FAQs about BBC Food ...

An authentic version of the classic beef in black bean sauce from Jeremy Pang. This recipe uses feremented black soy beans, which you can find in Asian supermarkets, online and in large supermarkets.