Description
Umami-rich stock where enzymatic breakdown of sardine proteins creates a balanced broth through controlled hydrolysis.
Technical
Proteolysis of niboshi myofibrillar proteins (particularly parvalbumins) releases glutamic acid and inosinic acid, while careful temperature management prevents excessive oxidation of sardine lipids that would produce rancid notes. The soaking step hydrates collagen networks to control bitter peptide release.
Culinary Significance
Foundational flavor base for miso soup and noodle broths, valued for its deeper umami profile compared to kombu-only dashi.
Science
Primary Reaction
Proteolytic cleavage of parvalbumin → free glutamates + bitter peptides
Parameters
Temperature
85°C optimal
75°C to 90°C range
Time
30min
15min – 1hr
Equipment
Donabe (earthenware pot) for even heatAmi shakushi (perforated ladle) for skimming