Tianmianjiang — wheat-flour-and-fermented-bean sauce. The base for Beijing zhajiangmian and the wrap sauce for moo shu.
Beijing and northern Hebei. The earliest documented sweet bean sauce is Baoding mianjiang, first made in 1671 (10th year of the Qing Kangxi reign); Liubiju, the Beijing reference house, is renowned for it. Liubiju, founded 1530 in Qianmen, is the reference brand and still operates from the same hutong; the house has long been famed for its huangjiang and tianmianjiang.
Liubiju's eight-leaf labeled jar is hand-aged in open courtyards; the supermarket Liubiju in plastic tubs is industrial. The price difference is roughly 10× — and the difference shows in zhajiangmian, where industrial paste flattens to one-note salt.
Cocoa-brown, paste-thick, almost candy-glossy in the jar. Sweet up front (it really is sweet — wheat starch broken down to malt sugar), light soy salt, faint mushroom funk. No heat, no sourness. Spread thin on a scallion + duck wrap.
Wheat flour steamed into bricks, inoculated with Aspergillus oryzae for koji, then salt-brined and sun-aged 30–90 days. Amylase in the koji breaks wheat starch into maltose — that's the sweetness, not added sugar. Hoisin's wheat half is built on this same paste.
Variations
Liubiju (Beijing, hand-aged, standard); Tianjin guifaxiang (saltier, used in goubuli baozi filling); Shanxi-style (drier, often blended with sesame paste for mantou dipping).
On the Palate
Where Sweet Bean Sauce sits in the Chinese flavor cloud
Ingredients
Serves 6How it's made
4 steps · 10 min active + 40 min waiting
- 15 min
Mix 1 kg fermented wheat-soybean paste + 200 g sugar + 100 ml soy sauce.
- 210 min
Heat in heavy pot stirring constantly to dissolve sugar.
Watch outStir without stopping the whole time — this paste is thick and scorches on the bottom in an instant, and one burnt patch turns the whole batch bitter.
- 330 min
Simmer 30 min to thicken to spreadable jam consistency.
Watch outPull it when a spoon dragged across the bottom leaves a slow-closing trail and it mounds like jam — it firms up more as it cools, so stop just shy of stiff.
- 45 min
Cool; jar; use for moo shu pancakes or zhajiangmian sauce base.
