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August 1, 2026Short & citedBlog
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Everyday Life • Food & Drink

Century Egg

Century egg is a preserved egg of Chinese origin, usually made from duck eggs but sometimes chicken or quail eggs.

Updated August 1, 20261 min readCited sources

Century egg is a traditional Chinese preserved egg, typically made from duck eggs, that is cured for weeks to months in an alkaline mixture. Despite its name, it is not aged for a century.

What it is

Century egg, also called pidan or thousand-year egg, is a preserved egg with a dark, translucent white and a creamy, dark yolk. It has a pungent flavour and is a staple in Chinese and other East Asian cuisines.

How it's made

Eggs are coated or packed in a mixture of clay, ash, salt, quicklime, and rice hulls, then left to cure for several weeks to months. The high-alkaline environment transforms the egg's texture, colour, and taste.

Culinary use

Century eggs are often eaten with congee, tofu, or as a side dish with soy sauce and sesame oil. They are available in many Chinese and Asian grocery stores in Canada, especially in cities with large Chinese-Canadian communities.

In short

  • Century eggs are not aged for a century; curing takes weeks to months.
  • The alkaline curing mixture changes the egg's appearance and flavour.
  • They are commonly eaten with congee or tofu in Chinese cuisine.
  • Available in Canadian Asian grocery stores and restaurants.
Canadian angle

Century eggs are available in many Chinese and broader Asian grocery stores and restaurants in Canada, especially in cities with large Chinese-Canadian communities.

Quick questions

Is a century egg actually 100 years old?
No. Century eggs are usually cured for only a few weeks to a few months.
What eggs are used to make century eggs?
Duck eggs are most common, but chicken and quail eggs are also used.
Where did century eggs come from?
They originated in China and are often linked to the Ming dynasty, though the exact origin is not firmly documented.

Sources

  1. Britannicahttps://www.britannica.com/topic/century-egg
    Supports: Century egg is a preserved egg of Chinese origin.
  2. Wikipediahttps://en.wikipedia.org/wiki/Century_egg
    Supports: Common names, egg types used, and preservation ingredients/process.
  3. Great British Chefshttps://www.greatbritishchefs.com/features/what-is-a-century-egg
    Supports: Origin in ancient China, typical curing time, ingredients, and culinary uses.
  4. BBC Travelhttps://www.bbc.com/travel/article/20151208-the-rotten-egg-people-love-to-eat
    Supports: Historical origin story, Ming dynasty association, and spread in Asia.
  5. American Chemical Societyhttps://www.acs.org/content/dam/acsorg/pressroom/reactions/infographics/what-are-century-eggs.pdf
    Supports: Chemical explanation of alkaline-fermented eggs and origin in China.