Composite flavor base material, oyster sauce and preparation method of oyster sauce

The invention discloses a compound flavor base material, oyster sauce and a preparation method thereof, and belongs to the technical field of food processing. The preparation method of the composite flavor base material provided by the invention comprises the following steps: carrying out extrusion puffing treatment on pretreated wheat to obtain wheat flour; mixing wheat flour, white granulated sugar, the enzymolysis oyster juice and water, sterilizing, inoculating yeast for fermentation, filtering after fermentation, and collecting filtrate; adding table salt into the filtrate, boiling, and keeping the temperature to obtain the composite flavor base material after the temperature keeping is finished. According to the technical scheme provided by the invention, fishy smell components in the enzymolysis oyster juice can be removed step by step, the flavor of the composite seasoning base material is improved step by step, and the composite seasoning base material has a certain preservative effect due to the fac