usually packed in plastic bags and stacked in an isle along with other bags of more recognizable beans, these are what give that special flavor to the black bean-based dishes you find in a Chinese restaurant. But unless you’re a die-hard fan and use them frequently, you might find it easier to get the black bean paste instead. The paste delivers less flavor, however.
oxidized soybeans that are salt-dried, have a savory, salty and slightly bitter flavor. They are frequently used in Chinese stir-fries, marinades and sauces. Before using, they should be soaked in water for 10 to 30 minutes to get rid of excess salt. When purchasing fermented black beans, look for shiny and firm beans, rather than dull and dry ones with salt spots. Once open, store in plastic in the refrigerator for up to 1 year.