Preserved black beans (also known as douchi, fermented black soybeans, or salty black beans) are a staple Chinese seasoning made by fermenting and salting black soybeans. They are not the same as Latin American black turtle beans and have a sharp, pungent, savory, and extremely salty flavor profile. Core Culinary UsesBlack Bean Sauce: The primary ingredient in classic dishes like beef in black bean sauce, steamed pork ribs, and mapo tofu. Flavor Base: Typically rinsed briefly to remove excess surface salt, then minced or mashed with garlic and ginger before cooking.Umami Booster: Used sparingly to add deep savory depth to stir-fries, steamed seafood, and braises. Profile: Spicy, savory, and perfect as a topping or quick sauce. Storage and HandlingRinsing: Always rinse with cold water before use to control the saltiness of your dish. Shelf Life: Store in an airtight container in a cool, dark pantry for months, or refrigerate to extend freshness indefinitely.