Taiwanese Sun Moon Lake Black Tea — Ruby 18 and Assam
Origin
Sun Moon Lake's black tea history began during Japanese colonial rule (1895–1945) when Japanese agricultural researchers transplanted Assam tea plants from India to Taiwan's high-altitude lake region to develop a domestic black tea industry for export. After Taiwan's liberation in 1945, the Taiwan Tea Research and Extension Station continued developing the region's tea genetics, ultimately producing Ruby 18 in 1999 after a 50-year breeding programme. Ruby 18 was released commercially in 2000 and has become one of Taiwan's most prized and internationally recognised specialty teas.
Description
Sun Moon Lake (日月潭, Rìyuè Tán) in Nantou County, Taiwan, is the only commercially significant black tea-producing region in Taiwan — home to the extraordinary Ruby 18 (台茶十八號, Taiwan Tea No. 18), a hybrid varietal developed by the Taiwan Tea Research and Extension Station in 1999 by crossing large-leaf Assam (Camellia sinensis var. assamica) with Taiwanese wild mountain tea. Ruby 18 produces a distinctive black tea with notes of cinnamon, mint, sweet winter melon, and dark cherry with zero astringency — a completely unique flavour profile not replicated by any other tea globally. Sun Moon Lake Assam black tea, introduced by Japanese colonial agriculture in the 1920s, also produces excellent malty-strong black teas that rival Assam, India for body and robustness. Taiwan's black tea, overshadowed internationally by its oolong reputation, represents one of the world's most extraordinary undiscovered premium black tea categories. Taiwan Gold (台茶21號), a yellow varietal, adds a third expression to the Sun Moon Lake terroir.
The Thread
Flavour Context
FOOD PAIRING: Ruby 18's cinnamon-mint-cherry character pairs with Taiwanese desserts: pineapple cake, sesame candy, and red bean mochi. The cinnamon note bridges specifically to cinnamon-spiced foods: apple tart, cinnamon roll, and snickerdoodle cookies. From the Provenance 1000, pair with apple and cinnamon galette, cherry clafoutis, or a dark chocolate with mint crust. Sun Moon Lake Assam pairs as a standard black tea with milk for breakfast service across all Western breakfast food categories.