An Ancient Chinese Delicacy
Century eggs, also called pidan, are a traditional Chinese food that dates back to at least the Ming Dynasty (1368–1644). They are made by preserving duck, chicken, or quail eggs in a mixture of clay, ash, salt, quicklime, and rice hulls for several weeks or months.
A Unique Transformation
During the preservation process, the egg whites turn into a dark amber jelly, while the yolk becomes greenish-black and creamy. This is due to alkaline chemical reactions that break down proteins and fats, altering the texture and flavor. The eggs develop a strong aroma due to the release of ammonia and sulfur compounds.
A Discovery by Accident
According to historical accounts, century eggs may have been discovered when eggs were left in slaked lime during house construction. Farmers later adopted the method for preservation. Over time, the process was refined into a delicacy enjoyed across China and beyond.
A Dish with Many Uses
Century eggs are often served with pickled ginger, congee, or tofu. Despite their pungent smell and strong taste, they are considered a delicacy in many Asian cuisines.
Century eggs, or pidan, are a Chinese delicacy dating back to the Ming Dynasty. Preserved in clay, ash, salt, quicklime, and rice hulls for weeks or months, they change in color, texture, and flavor. Found by accident, they became a widely eaten food in China and beyond.🧵👇 pic.twitter.com/bLqOgswqnV
— Detective Tiger's Stories (@TigerDetective) February 13, 2025