Description
Controlled microbial and oxidative transformation of grape must through sequential barrel aging.
Technical
Concentrated grape must undergoes Maillard reactions and enzymatic breakdown of sugars (invertase activity) while acetic acid bacteria (Acetobacter spp.) and wood-derived compounds create complex flavor matrices. Evaporation (up to 10% annual 'angel's share') increases viscosity.
Culinary Significance
Develops syrupy texture and balanced sweet-sour profile with layered umami characteristics, transforming simple grape must into a premium finishing ingredient.
Science
Primary Reaction
Oxidation of polyphenols
Parameters
Temperature
18°C optimal
10°C to 25°C range
Time
12 years
3 years – 25+ years
Equipment
Traditional batteria (sequence of 5-7 decreasing-size barrels)Cherrywood/chestnut/mulberry barrels (60-100L)Unheated attic spaces