Beijing douzhiFermented mung bean drink
Douzhi is the most famous acquired taste in Beijing: a hot, grey-green, sour drink made from the liquid left when mung beans are ground for starch, then fermented. Old Beijingers sip it at breakfast with crisp jiaoquan rings and shredded salted mustard pickles, and visitors either love it or never try it twice. At home you make a small batch by blending mung beans, settling out the starch and fermenting the cloudy water for a day. The mistake is letting it boil hard: it separates into watery and thick layers, so keep it at a gentle bubble. It must smell cleanly sour like yogurt; throw it away if it smells rotten, has mould, or turns pink or slimy. Chef's tip: stir it continuously as it heats and add a splash of the thinner liquid at the end, which keeps the classic smooth, slightly thick texture.
























