The invention belongs to the technical field of
processing of agricultural and sideline products, and particularly relates to a preparation method of a thick broad-bean sauce. The preparation method comprises the following steps of A, performing screening out to obtain broad bean segments free from mechanical damage and
lima beans free from mechanical damage, uniformly mixing the broad bean segments free from mechanical damage with the
lima beans free from mechanical damage, removing dust, and performing hulling so as to obtain a pretreated broad bean segment and lima bean mixture; B, adding the pretreated broad bean segment and lima bean mixture obtained in step A into water, performing boiling over,
fishing out the boiled broad bean segment and lima bean mixture, performing draining, adding the drained broad bean segment and lima bean mixture into a crushing stirrer, and performing stirring and crushing at the same time, so as to obtain
powder crushed substances; C, adding
wheat flour to the crushed substances obtained in step B, performing uniform mixing to obtain a new mixture, uniformly spreading the new mixture in a
winnowing fan, putting the
winnowing fan in a fermenting room, performing
fermentation, and when yellow
mildew grows in the
winnowing fan after observation, obtaining primary
fermentation substances; and D, putting the primary
fermentation substances obtainedin step C in an earthenware vat, adding salt and water, performing uniform mixing, putting the earthenware vat in a sealed fermenter, putting
edible oil,
hot peppers and pepper fruits, which are uniformly mixed, in the sealed fermenter, and performing fermentation so as to obtain fermentation substances namely the thick broad-bean sauce. The thick broad-bean sauce is unique in
flavor and rich in mouth feel.