Wheat and Maize in New Spain

Maize was domesticated in Mesoamerica, with evidence reaching back at least 8,700 years in Guerrero. Wheat arrived with the Spanish colonial enterprise from 1519 onwards and took its firmest culinary hold in the mission-settled north, where the oldest documented flour tortillas date to Parras, Coahuila, in 1734.

When Hernán Cortés founded Villa Rica de la Vera Cruz in 1519, he set in motion an agricultural encounter that would reshape the food of an entire continent. The meeting of wheat and maize in New Spain was not a simple displacement of one grain by another. It was a negotiation — unequal, violent in its broader context, yet genuinely complex in its culinary outcomes — that produced some of the most distinctive regional food cultures Mexico has today. Maize was already ancient when the Spanish arrived. Pollen and starch evidence from the Xihuatoxtla shelter in the central Balsas valley of Guerrero places maize in use at least 8,700 years ago. The oldest dated cobs, from Guilá Naquitz in Oaxaca, are about 6,250 years old. By 1519 the grain had been nixtamalized for at least a millennium — soaked and simmered with calcium hydroxide or wood ash in a process that makes masa possible, improves its protein balance, and adds calcium. Maize was not one thing but a living system: 64 races are recorded in Mexico today, 59 of them native. Each was the result of generations of selection adapted to altitude, rainfall, and the specific demands of the milpa. To the Mexica, the Maya, the Purépecha, the Zapotec, and dozens of other peoples, maize was not merely a crop. It was a civilisational technology, a cosmological fact, and the medium through which most daily labour passed — including the five to six hours a day that women spent grinding and forming tortillas for a single household. Wheat arrived with the colonisers. It carried with it the full weight of Iberian and Catholic dietary culture: wheat bread was the bread of the Eucharist, and wherever the Church established a mission or a town, the pressure to grow wheat followed. In the fertile valleys of central New Spain — in what is now Puebla, the Bajío, and the Valley of Mexico — wheat cultivation established itself relatively early, often on land reorganised under the colonial system and worked by Indigenous and later African labour. The population who grew it did not, for the most part, eat it. Wheat bread was an urban, European, and creole food. Maize remained the staple for the vast majority of the population, and its hold was not weakened by the conquest. It deepened. The most decisive and durable meeting of wheat and maize culture occurred not in the centre but in the north. As missions and presidios pushed into what are now Sonora, Chihuahua, Coahuila, and the broader region of the Gran Norte, they brought wheat as both a material and a symbolic priority. Franciscan, Jesuit, and Dominican missionaries promoted wheat cultivation among Indigenous communities partly for liturgical reasons and partly because Iberian food culture was simply what they knew. Wheat grew well in the irrigation-dependent north and became integrated into local practice in ways it never did in the centre or south. The oldest explicit printed mention of flour tortillas — recorded as 'tortillas de arina' — comes from Parras, Coahuila, in 1734, and that date is a document of a reality already established, not an origin point. Flour tortillas belong to the north. They remain today a signature of Sonoran, Chihuahuan, and norteño cooking: larger, thinner in some forms, and made possible by the confluence of mission wheat, cattle lard from the same colonial economy, and the practical skill of cooks who adapted a familiar form to a new ingredient. The centre and south held to nixtamalized maize with a tenacity that speaks not to conservatism but to rational preference. Masa is more nutritionally complete than plain maize flour, and the tortilla it produces — supple, flavourful, and capable of being made fresh at the comal three times a day — is a tool as much as a food. When dry masa flour became an industrial product from 1949, beginning in Cerralvo, Nuevo León, and the nixtamal mills that had already spread across the country (from 927 in 1935 to nearly 6,000 in 1940) gave way to the masa harina packet, the question of what would be lost in that transition was more than sentimental. Flavour, variety, and the genetic diversity maintained by small-scale milpa farmers all hung in the balance. The tension between wheat and maize was never simply colonial versus Indigenous, nor urban versus rural. The comida corrida — the multi-course midday meal of urban working Mexico — set tortillas beside white bread rolls. Bakeries became an established feature of Mexican towns through the colonial and early national periods, producing a tradition of pan dulce — sweet breads shaped into dozens of regional forms — that has become as thoroughly Mexican as any pre-Columbian preparation. The concha, the cuerno, the polvorón: these are not foreign intrusions. They are the long result of a cultural process that made wheat, on its own terms and in its own forms, a genuine part of Mexican material life — without ever dislodging maize from its centre. The constitutional ban on planting genetically modified maize, enacted in March 2025, marks the latest chapter in a conflict that is ultimately about sovereignty over the grain that built Mexican civilisation. Wheat and maize coexist today, but they have never been equal. They came from different histories, entered different kitchens, and carry different meanings. Understanding that is essential to reading any regional Mexican food culture honestly.

Flour tortillas made with lard carry a richness and pliability that corn tortillas do not. Masa from freshly nixtamalized maize has a mineral, earthy depth — and significant variety across races and terroir — that dry masa flour diminishes. The flavour difference between a hand-formed corn tortilla made from a local landrace and one made from industrial masa harina is as meaningful as the difference between stone-milled whole wheat and bleached white flour.