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Step-by-Step Tutorial
PRACTICAL WALKTHROUGH · PARAMETERS · COMMON MISTAKES
Maizena souring is a spontaneous low‑temperature fermentation of maize dough that produces lactic acid and ethanol.
Origin: Quechua and Aymara peoples (pre‑Columbian) — Andean highlands (Peru, Bolivia)
See full technique reference →During fermentation, lactic acid bacteria such as Lactobacillus plantarum convert maize starch into lactic acid, lowering the pH to 3.5–4.0, while yeasts metabolize sugars to produce ethanol and CO₂. The balance of acid and alcohol imparts a characteristic sour, mildly alcoholic flavor.
Primary Reaction
Spontaneous lactic acid fermentation and alcoholic fermentation of maize starch by indigenous lactic acid bacteria and yeasts
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