The invention relates to the field of brewed vinegar, in particular to glutinous rice fermented
wine-based
flavor enhanced brewed vinegar and a preparation method thereof, and aims to solve the problems that existing glutinous rice vinegar is generally low in
total acid content, insufficient in non-volatile
acid content and simple in
flavor level. The brewed vinegar takes a mixture of white glutinous rice and black glutinous rice as a main
raw material, the white glutinous rice provides the most basic
sweet taste and
alcohol taste, the addition of the black glutinous rice can greatly enrich
flavor levels, a
pineapple extract and a rhizoma polygonati extract are added, pineapples are rich in
malic acid and
citric acid, and the organic acids are introduced into a
system in an alcoholic
fermentation stage, so that the taste of the brewed vinegar is improved. The rhizoma polygonati extract contains a large amount of
polysaccharide substances and can provide
nutrient substances for
yeast fermentation,
saponin and
phenolic acid substances in the rhizoma polygonati extract have the capability of
scavenging free radicals and can inhibit oxidation of
unsaturated fatty acid and degradation of pigments in vinegar, and the rhizoma polygonati extract can be used for preparing the fruit vinegar. The product flavor stability is prolonged.