Description
A stable sourdough culture using wild yeasts and lactobacilli for leavening and flavor development.
Technical
Levain maintains a symbiotic culture of Saccharomyces exiguus and various Lactobacillus species (L. sanfranciscensis, L. brevis) that produce CO2, ethanol, and organic acids through heterofermentative metabolism.
Culinary Significance
Provides superior oven spring, complex flavor profiles, and extended shelf life compared to commercial yeast breads.
Science
Primary Reaction
C6H12O6 → 2C2H5OH + 2CO2 (ethanol fermentation)
Parameters
Temperature
22°C optimal
15°C to 28°C range
Time
12 hours
5 hours – 36 hours
Equipment
Glass or food-grade plastic containerDigital scale (0.1g precision)Stiff spatulaBreathable cover (cheesecloth)