Description
Yuzu kosho is a fermented citrus–chili condiment from Nagasaki that relies on lactic acid bacteria to lower pH and develop complex aromas.
Technical
During fermentation, lactic acid bacteria convert sugars from yuzu zest and chili peppers into lactic acid, dropping the pH to 4.5–5.0 and inhibiting spoilage microbes. The acidic environment stabilizes volatile compounds such as citral, limonene, and capsaicin, while optional rice‑bran amylases hydrolyze starches to sugars, feeding the bacteria and accelerating flavor development.
Science
Primary Reaction
lactic acid fermentation of sugars by lactic acid bacteria
Sensory Profile
Aroma ()
citrusyspicyherbaceoussharpwarmfloralearthypungentbrightzingy