Yunnan's ancient compressed fermented tea, aged in humidity until its green astringency transforms into the deep notes of leather, camphor, and dried fruit that made it the currency of the Tea Horse Road
Origin: Yunnan Province, China
From the journey of Tea.
Pu-erh (普洱茶, pǔ'ěr chá) is the world's only tea that genuinely improves with age, undergoing a slow post-fermentation by the microbial communities that colonise its surface during storage in humid, dark conditions. Named after the market town of Pu'er in Yunnan Province (historically known as Puer or Simao), where compressed tea cakes were assembled for the caravan trade northward into Tibet and Mongolia, pu-erh represents the oldest continuously practised fermented tea tradition on earth. The two principal forms are sheng (生, 'raw') pu-erh, which is simply compressed and then aged for years or decades until the original green-tea astringency slowly transforms through microbial action, and shou (熟, 'ripe') pu-erh, developed in Yunnan in 1973 to accelerate this process artificially using a deep-pile wet-heap fermentation (wodui) that achieves in sixty days what natural ageing takes fifteen years. A good aged sheng pu-erh cake from a reputable old-growth Yunnan mountain: Yiwu, Bulang, Nannuo, or Banzhang: sells at auction for hundreds or thousands of pounds; vintage cakes from the 1950s and 1960s, stored in the dry warehouses of Guangzhou or the traditional humid conditions of Hong Kong, are among the most expensive drinkable commodities in the world. Pu-erh is the only tea with a legally protected geographical indication: to be labelled pu-erh, the tea must be made from broad-leafed Yunnan large-leaf tea trees (Camellia sinensis var. assamica) grown within Yunnan Province, processed by sun-withering and pan-frying, and compressed or otherwise prepared by accepted methods. This recipe describes the gongfu preparation of a fine aged sheng pu-erh, the method by which its depth and complexity are most fully revealed.
Storage matters: pu-erh ages best in a dry, cool, well-ventilated space away from strong odours. Avoid sealed containers or the refrigerator. Unopened compressed cakes can be aged for decades in good storage conditions. The paper wrapper and bamboo-leaf outer wrapping are part of the terroir: they breathe and contribute to the ageing environment. If you cannot find aged sheng pu-erh, a quality shou (ripe) pu-erh provides a reasonable introduction to the earthy, deep-roasted flavour profile, though it lacks the complexity of natural ageing.
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