Description
Spontaneous fermentation of agave sugars by endemic microbiota creates mezcal's signature terroir.
Technical
Wild yeasts (e.g., Saccharomyces cerevisiae, Kluyveromyces marxianus) and bacteria (e.g., Lactobacillus, Acetobacter) convert agave fructans into ethanol and complex esters. Pit fermentation introduces soil-derived microbes through maguey fiber padding.
Culinary Significance
This uncontrolled process yields the smoky, funky notes distinguishing artisanal mezcal from industrially fermented spirits.
Science
Primary Reaction
Ethanol fermentation
Parameters
Temperature
28°C optimal
18°C to 35°C range
Time
168 hours
72 hours – 360 hours
Equipment
Tahona stone millCypress wood vatsGoatskin fermentation bags (historical)