Nixtamalisation was developed in Mesoamerica approximately 3,000 years ago — it was a prerequisite for the corn-based civilisations of the Aztec and Maya. When the Spanish brought corn to Europe without the accompanying knowledge of nixtamalisation, the resulting pellagra epidemics in rural Italy, Spain, and southern France in the 18th–19th centuries killed tens of thousands.
Nixtamalisation (from the Nahuatl nextli — lime-treated corn — and tamalli — corn dough) — the alkaline treatment of dried corn with calcium hydroxide (cal, food-grade lime) — is one of the most important discoveries in human culinary and nutritional history. The process transforms dried corn at the molecular level: the alkaline environment (pH 11–12) dissolves the corn kernel's pericarp (outer hull), gelatinises some of the starch, and — most critically — releases niacin (vitamin B3) from its bound form in the corn's protein matrix. Without nixtamalisation, a diet based on corn produces pellagra (niacin deficiency). Every civilisation that adopted corn without nixtamalisation suffered pellagra epidemics.
- **Calcium hydroxide (cal):** Food-grade — not construction lime. Available in Latin American grocery stores. - **The ratio:** 1 tablespoon cal per 500g dried corn per litre of water. [VERIFY] Arronte's specific ratio. - **The cook:** Corn + cal + water brought to a simmer for 30–45 minutes. The corn should soften but not fully cook — the goal is processing, not eating. - **The steep:** Off heat, covered, 8–12 hours. The alkaline solution continues working during the steep. - **The rinse:** Drain and rinse the corn thoroughly — the alkaline water (nejayote) is discarded (it has a distinctive smell and strong alkalinity). The rinsed corn is now hominy (nixtamal) — its distinctive smell (slightly mineral, corn-forward) is the indicator of complete nixtamalisation. - **Grinding:** Wet-ground on a metate or in a wet-stone grinder to produce fresh masa. Sensory tests: **Smell of completed nixtamal:** A clean, slightly mineral, intensely corn smell — the characteristic smell of good tortillería and fresh masa. Any smell of raw cal or sourness indicates under-rinsing or over-processing. **Texture of nixtamal:** The outer hull should slip off easily with finger pressure. The corn should be tender throughout but still firm — not mushy.
Mexico: The Cookbook