“一锅豆汁味甜酸,咸菜盛来一大盘.此是北平新时品,请君莫作等闲看”.这是民国时期有人对北京小吃——豆汁的称赞.豆汁,是北京一种独具风味的流质小吃.北京人,特别是老北京人喜食豆汁尤如南方人日不离茶.它原是“粉房”的副产品,粉房是北京专作粉丝、淀粉的作坊.粉房工 “A pot of sweet and sour bean sauce, pickles Sheng to a large plate. This is a new product in Peking, please Mo for leisurely look.” This is the Republic of China during the snack - bean sauce praise. Bean juice is a Beijing alone With flavor of liquid snacks.Beijing, especially the old Peking Man like to eat soybeans, such as southerners do not leave the tea.It was originally a “powder room” by-product, powder room is a Beijing specialty fans, starch workshop.