
Hoisin sauce
A thick, dark, sweet-salty Chinese condiment built on fermented soybean paste. This page gives one quick home version and records how commercial formulas differ.
Tuong Ban · Tương Bần Yên Nhân · Bần tương · Bân tương
Tương Bần is a thick, sweet and salty northern Vietnamese soybean sauce made from soybean and sticky rice at Bần Yên Nhân in Hưng Yên, matured in ceramic jars for months.

Tương Bần is a regional soybean sauce associated with the craft village of Bần Yên Nhân in Mỹ Hào, Hưng Yên, northern Vietnam. It is thick and has a sweet and salty taste. The Vietnamese craft-village account and the national tourism page both tie it to the village and to its ceramic jar practice.
Its inputs are soybean and sticky rice. Both are prepared separately before they are combined.
Tương Bần combines mould-grown sticky rice with soybeans in covered ceramic jars and matures them outdoors, which gives the sauce its thick texture and sweet taste. The craft-village account gives the rice stage and the maturation time, but not salt proportions, jar sizes or temperatures.
The sources are heritage and tourism descriptions. They are not food-safety guidance and do not give shelf-life or storage periods. A home method needs a food-science source with process evidence.
The craft-village account and the national tourism page associate the sauce with Bần Yên Nhân and its jar practice.
Region as named by the cited source; no dated origin.
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GoVietnam TravelHistory · Method
Ban soy sauce craft village (Vietnam National Administration of Tourism)Sticky rice grown with mould on bamboo sieves for six to seven days.
Ceramic jar maturation three to six months; some batches over six months.
Cited in: The village and the sauce; Method; Limits