Taco de Huevo con Chorizo

At a fonda in the centre of Mexico the taco de huevo con chorizo is built on a small soft corn tortilla, pulled hot off the comal and folded around a scramble the colour of brick. This is the version south of the cattle country, where masa is the daily bread and the wrap is corn rather than wheat. The same filling crosses into Texas on a wide flour tortilla and answers to the English name breakfast taco, but the corn-tortilla taco eaten over a Mexican counter is older and plainer, ordered by the count and named for what is inside it, not for the time of day.

The filling cannot be taken apart on the plate, because the two halves cook into each other before they reach the tortilla. The chorizo goes into the pan first, crumbled and worked with a spoon until the casing-free sausage slumps and gives up a bright orange fat thick with chile and spice. The beaten egg goes straight into that fat and is folded through until the curds set glossy and stained, neither part recoverable from the other. What lands on the warm tortilla is a single spiced scramble, soft and a little oily, held in a shape a hand can carry out the door.

The pairing runs better than either half alone. Plain egg is a soft neutral start with little to say in the morning, and chorizo on its own is a mouthful of fat and chile too sharp to eat by the spoon. In one pan each settles the other. The egg drinks the rendered sausage and pulls its heat back to something you can finish; the chorizo lends the egg a deep colour, a vinegar tang, and a whole flavour it had none of. Cheese is the exception rather than the rule here, because the scramble is already rich enough that a melt would only dull it. The salsa is laid on at the last moment, never folded in at the stove.

The whole thing turns on judging the fat in the pan. The chorizo has to render fully and brown, which is why it is broken small and cooked first; rush it and the sausage stays pasty and pale and never gives up its colour. The cook then reads how much of that bright grease to leave, since a flood makes a slick taco that weeps through the corn and a dry pan throws out the seasoning. The egg comes off the heat while still wet and shining, because chorizo eggs held a beat too long turn grey and grainy. The tortilla has to be limber off the comal or it cracks at the fold and dumps the filling out the crease.

Which chorizo goes in the pan is itself a regional choice. The standard is chorizo rojo, the red sausage that takes its colour from guajillo and ancho chiles and stains the egg deep orange. But around Toluca a cook may reach instead for chorizo verde, the green chorizo coloured with tomatillo, cilantro, and poblano rather than dried red chile, which scrambles into a startling mossy egg that tastes brighter and more herbal than the red. A taco de huevo con chorizo verde is a State of Mexico thing above all, and the swap changes the colour of the whole plate without changing the method.

This is almuerzo food, the midmorning meal that bridges an early Mexican breakfast and a late comida, and the order names the filling rather than the wrap. You call for tacos de huevo con chorizo at a market stall, a fonda, or a kitchen table, built to be eaten standing or on the move to work. A spoon of raw green salsa over the top lands cold and sour and cuts a clean line through the middle of the scramble. The tortilla shifts with the map: corn through the centre and south, soft flour across the northern states, the same eggs and sausage carried on a different bread depending on which grain is grown nearby.

A Sausage With a Paper Trail

The taco has no inventor, and the half of it that can be dated is the chorizo. Hernán Cortés established pig farming in the Valle de Toluca around 1525, and by the end of the sixteenth century Toluca, in what is now the State of Mexico, had become the country's chorizo centre, the place where the cured Spanish sausage was rebuilt as a soft, uncased, vinegar-and-chile sausage cooked fresh rather than air-dried. The town is still shorthand for good chorizo on a Mexican menu. Cooking that sausage down with egg to fill a morning tortilla is older than any restaurant record, a home and market dish out of the almuerzo and the taco de guisado tradition.

Toluca later gave the taco its second colour. Chorizo verde, the green sausage now folded into many of these eggs around the State of Mexico, is a recent local invention, created in the small towns of the Toluca valley around the 1960s and 1970s and often attributed to the municipality of Texcalyacac. By most accounts it arose as a workaround when Spanish paprika and dried red chiles grew expensive, swapping in tomatillo and fresh green herbs for the red colour. It remains effectively unique to the state, which is why a green huevo con chorizo reads as a marker of place the moment it hits the tortilla.

The print trail, where there is one, follows the English name rather than the food. The dish needed no naming in Mexico, where it was simply a tortilla wrapped around eggs and sausage, but the term breakfast taco surfaces in United States newspapers only from 1975, in an Arizona Republic account of eating breakfast tacos on a tour of San Antonio. The Mexican corn-tortilla taco it describes had been eaten across the centre and north of the country for generations before anyone north of the border bothered to write the name down.