century eggs

Century eggs, also known as pídàn (皮蛋) in Mandarin or pei tan in Cantonese, are preserved duck, chicken, or quail eggs that have been cured in a mixture of salt, calcium hydroxide, and other alkaline compounds for several weeks to several months. The curing process transforms the egg white into a dark amber or translucent jelly-like substance with a complex flavor profile, while the yolk becomes dark green or black with intricate crystalline patterns. Despite their name, century eggs require only 4-6 weeks to cure under proper conditions, though extended curing times were historically used. The ingredient originated in China, likely during the Ming Dynasty, and remains a staple of Chinese cuisine. The dark coloration and gelatinous texture result from the alkaline environment breaking down proteins and converting sulfur compounds into organosulfur molecules, creating the distinctive pungent, ammonia-like aroma and complex umami-rich flavor.

Century eggs are typically served as a cold appetizer, often paired with pickled ginger, soy sauce, and steamed rice. In Chinese cuisine, they appear sliced atop rice congee, diced into porridge, or served alongside preserved mustard greens in the dish pídàn dòufu (century egg and tofu). The gelatinous texture and intense umami flavor make them suitable as a garnish for noodle soups, a component in egg congee, or simply cut into wedges as part of a dim sum course. The strong, funky aroma and acquired taste mean they are typically used sparingly and paired with mild or acidic accompaniments. Beyond China, they have gained popularity in Southeast Asian cuisines and among adventurous eaters in Western contexts.