Chile loco: what it is, uses and what to substitute

What is it?

The chile loco is a regional variety little known outside Guerrero and Oaxaca, where it is used as an ingredient in traditional salsas and stews. It owes its name to being a natural cross between different varieties of Capsicum annuum, which causes the plants to produce fruit that varies in size, shape and even heat: 'loco' (mad) means precisely that it does not follow a uniform pattern. It grows mainly on the Costa Chica and in the central sierra of Guerrero, as well as in areas bordering Oaxaca. Its intensity ranges between 10,000 and 20,000 Scoville units, hotter than the jalapeño but milder than the chile de árbol. It is used fresh or dried for regional salsas, Guerrero-style green mole, pickles and country stews. Although its production is marginal, rural communities continue to grow it as part of their family farming heritage and their diversified milpa system.

Origin and history

The chile loco is the result of cross-pollination between different landrace varieties of Capsicum annuum grown in family plots of the Sierra Madre del Sur. This genetic diversity is a common phenomenon in areas where several native chillies coexist without agricultural separation, and Guerrero farmers have made use of it for generations as a 'multi-purpose' chilli. Although it does not appear in classic colonial recipe books, the ethnobotanical inventories of the INAH and CONABIO document its continuous use in the country cooking of the Costa Chica of Guerrero and the Oaxacan Mixteca. The Amuzgo, Mixtec and Nahua peoples of Guerrero have kept this chilli as part of the traditional milpa, where it is grown alongside maize, beans and squash. CONABIO includes it in its inventories of Mexican landrace Capsicum as a representative of the genetic diversity of the chilli still preserved in traditional cropping systems, regarded as a priority plant genetic resource.

Characteristic ingredients

The chile loco has no uniform morphology: on a single plant there may appear small fruit similar to the chiltepín, others more elongated resembling the serrano, and some fleshy ones like the jalapeño. What unites them is the flavour: earthy, slightly fruity and with a medium to high heat that surprises by its variability even within the same bush. It is used both fresh green and ripe red and, to a lesser extent, dried. In regional cooking it is ground in a molcajete with green tomato, garlic and salt to accompany the classic Guerrero-style green mole; it is added to tamales nejos, chicken broths and stews with purslane. In the Oaxacan Mixteca it is included in salsas for goat barbacoa and in homemade pickles with vinegar and oregano. Its heterogeneous character makes it unpredictable, so traditional cooks always taste before adding it, adjusting the quantity according to the heat of the particular batch.

Cultural significance

The chile loco represents an emblematic case of the genetic diversity of the Mexican chilli and of the country cooking of the Sierra Madre del Sur. It forms part of the milpa system, which UNESCO recognises as an outstanding example of traditional agroecology. Its preservation is tied to the work of Amuzgo, Mixtec, Nahua and Afro-Mexican communities of the Costa Chica of Guerrero, where the chilli is part of family self-sufficiency and of trade in local markets such as those of Tlapa, Ometepec and Chilapa. CONABIO includes the chile loco in its inventories of vulnerable landrace varieties and promotes its in situ conservation alongside other native chillies. Although it lacks the media recognition of the habanero or the chile de árbol, the chile loco is living testimony to Mexico's biocultural richness and to the adaptive capacity of indigenous farming systems, which have maintained the biodiversity of Capsicum over thousands of years without interruption.

Frequently asked questions

Why is it called chile loco?

The name comes from the heterogeneity of its fruit: on a single plant grow chillies of very different sizes, shapes and heat levels, behaving in a 'mad' or unpredictable way compared with uniform varieties. This variability is the result of the natural crossing of different landrace chillies grown together in family plots of the Sierra Madre del Sur, without separation.

How hot is the chile loco?

Its heat ranges between 10,000 and 20,000 Scoville units, comparable to the serrano chilli or slightly higher. However, because of its genetic heterogeneity, fruit from the same plant can be much hotter or much milder. Traditional cooks always taste before adding it to a salsa or stew to avoid surprises in the final result.

In which dishes is the chile loco used?

It is a key ingredient of Guerrero-style green mole, where it provides heat and aroma. It is also used in molcajete salsas, Guerrero tamales nejos, chicken broths, stews with purslane, homemade pickles with vinegar and oregano, and Mixtec goat barbacoa. It is typical of the country cooking of the Costa Chica of Guerrero and the Oaxacan Mixteca.

Where is the chile loco grown?

It is grown in family plots of the Sierra Madre del Sur, mainly in Guerrero (the Costa Chica, the central sierra, the regions of Tlapa and Ometepec) and in areas bordering Oaxaca, such as the upper and lower Mixteca. It is a chilli for self-consumption rather than for market, present in the milpa systems of Amuzgo, Mixtec, Nahua and Afro-Mexican communities.