The name fools almost everyone. “Ajo” is garlic. “Arriero” is mule driver. So naturally people assume bacalao al ajoarriero is salt cod cooked with a lot of garlic — a reasonable guess that misses the point entirely.
Garlic is in the dish. It’s one of a half-dozen ingredients cooked slowly together. What the name actually records is a profession, a trade route, and centuries of necessity: the arrieros were the muleteers who carried goods across the Iberian Peninsula for hundreds of years, and this is the dish they cooked on the road. That it became Pamplona’s defining fiesta stew is not an accident — Pamplona sat at the crossroads of the arrieros’ most traveled routes, and the city’s kitchens took the recipe, refined it with the produce of the Ebro valley, and made it their own.
The version you eat in Pamplona today — in the bars of the Casco Viejo, at the tables of gastronomic societies, at peña gatherings during San Fermín — is distinct from every other regional ajoarriero in Spain, and the difference comes down to one ingredient most people outside Navarra have never heard of.
The Arrieros and the Road That Built This Dish
The arrieros were professionals. For centuries they moved goods across Spain with strings of mules, connecting ports on the Cantabrian coast to the markets of Castile and Aragon, winding through mountain passes and trading in village squares. They were not romantic figures — they were working men who spent weeks on the road and needed food that traveled well and could be cooked over an open fire with whatever was in their packs.
Salt cod was the obvious protein. It required no refrigeration, kept for months, and was available at almost every market along the route. The arrieros desalted it in cold water when they stopped for the night, then cooked it in a clay pot with garlic, olive oil, and whatever produce they could buy or trade along the way: a handful of peppers, an onion, tomatoes when the season was right.
Pamplona was one of the great nodes on the arrieros’ network. The city sat where the Camino de Santiago crossed the roads coming down through the Pyrenees from France, and the routes running south toward Burgos and Madrid passed through it as well. Arrieros moved through Pamplona constantly, and the taverns of what is now the Casco Viejo fed them. The city’s cooks absorbed the recipe, added the peppers and tomatoes of the Ebro valley’s fertile huertas, and the Navarran version of bacalao al ajoarriero took shape.
Navarran recipes documenting the dish in its current form date to the late 19th century. The dish spread from Navarra to La Rioja, Aragon, Extremadura, and Andalusia — each region adapting it to local ingredients — but the Navarran preparation is the foundational one.
What Makes the Navarran Version Different
Every Spanish region that makes ajoarriero considers its version the correct one. They are wrong in instructive ways.
The version from Extremadura uses pimentón — smoked paprika — as the primary flavoring. The Castilian version is simpler: garlic, olive oil, desalted cod, minimal embellishment. The Aragonese version sometimes incorporates potato. All of them are good dishes. None of them is what you eat in Pamplona.
The Navarran version is built around the pimiento choricero, a dried red pepper specific to Northern Spanish cooking. The choricero is harvested in late summer, hung in strings to air-dry, and its pulp is scraped from the skin and added to the sofrito. The flavor is categorically different from paprika or fresh pepper: sweet rather than sharp, slightly smoky, with a depth that rounds out the acidity of the tomato and ties the whole dish together. It gives the Navarran ajoarriero its characteristic deep brick-red color and a richness that the simpler regional variants simply do not have.
The cod matters too. The traditional preparation calls for the central loin — the lomo — rather than tail cuts or shredded bacalao. The lomo is thick and gelatinous, and when it desalts slowly over 24 to 48 hours (in cold water, changed every eight hours), it softens into large, moist flakes that hold their texture during long, slow cooking. The dish is cooked “a fuego lento” — over low heat, unhurried — until the cod and the sauce become a single thing. In Pamplona, the dedicated salt cod stalls of the Mercado de Santo Domingo have supplied exactly these cuts for generations.
What you get is not a stew in the conventional sense. The sauce clings to the fish. The choricero gives it body. The garlic, the onion, the tomato, and a good olive oil from the Ribera de Navarra round out the flavor. It is one of those dishes that takes longer to explain than to eat.
Napardi and the Gastronomic Societies
To understand where bacalao al ajoarriero lives in Pamplona’s culture, you need to understand the gastronomic societies — the sociedades gastronómicas — that have shaped the city’s relationship with food for over a century.
These are private clubs, modeled originally on the ones that emerged in the Basque Country in the 19th century, where members cook together, eat together, and maintain the traditions of Northern Spanish cooking. They are not restaurants. They are not open to the general public. They are where Pamplona’s food culture passes from one generation to the next, and bacalao al ajoarriero is among the staple dishes that appear at their tables repeatedly throughout the year and especially during San Fermín.
Napardi is the oldest of them in Pamplona. Founded on February 11, 1953, by a group of Pamplonans who had visited the gastronomic societies of San Sebastián and returned determined to create something equivalent in Navarra’s capital, it opened its first headquarters at Calle Mayor 35 before moving to its current address on Calle Joaquín Jarauta. Since the 1980s, Napardi has awarded the Gallico de Oro — the Golden Rooster — each year during Sanfermines to individuals who have contributed to Pamplona’s cultural and gastronomic life.
The format is the same it has always been: members propose menus, guest chefs occasionally direct the cooking, and everyone sits down together at the end. The dishes are traditional Navarran ones. The bacalao al ajoarriero that appears at Napardi’s table is not adapted for tourists or simplified for a restaurant menu. It is the version that has been cooked in Pamplona’s kitchens for generations.
Eating It During San Fermín
During fiesta week, bacalao al ajoarriero appears everywhere in the Casco Viejo — at peña tables set up along the narrow streets, in the bars of Calle San Nicolás and Calle Estafeta, at the gastronomic society dinners that run parallel to the public celebrations. It is one of four or five dishes that define the San Fermín table alongside rabo de toro, magras con tomate, and the omnipresent pintxos.
“Whether it’s at Napardi, Pamplona’s oldest gastronomic society, or at a long wooden table set in the streets of the Casco Viejo, bacalao al ajoarriero is a staple of Pamplona cuisine. During fiesta, stick a napkin in your shirt — you’ll want to keep the tomato splatter off your bright whites.”
Dennis Clancey, Founder of Encierro
This is practical advice. San Fermín has a dress code — white shirt, white trousers, red faja and pañuelo — and the brick-red sauce of a well-made ajoarriero is not forgiving of careless eating. The napkin-in-the-collar move is recognized at every peña table in the city. Nobody thinks less of you for it.
If you are eating in the Casco Viejo, Pa Comé on Calle Comedias serves a traditional Navarran ajoarriero with a fried egg on top — a contemporary variation that has become common in Pamplona’s more casual restaurants. The bars along Calle San Nicolás typically offer it as a ración alongside the pintxos.
FAQ
What is bacalao al ajoarriero?
Bacalao al ajoarriero is a traditional salt cod stew from Navarra, Spain. The name combines “ajo” (garlic) and “arriero” (mule driver), referring to the muleteers who cooked it on trade routes across the Iberian Peninsula. The Navarran version is made with desalted salt cod, choricero pepper, tomato, garlic, onion, and olive oil, cooked slowly until the sauce and fish are fully integrated.
What makes bacalao al ajoarriero different from other Spanish salt cod dishes?
The defining ingredient in the Navarran version is the pimiento choricero — a dried red pepper whose pulp is scraped into the sofrito, giving the dish its deep brick-red color and rounded, slightly smoky sweetness. This sets it apart from the paprika-based versions of Extremadura and the simpler olive-oil preparations of Castile. It also puts the dish at the opposite pole from the Basque coast’s bacalao al pil pil, which keeps the loin whole and builds its sauce from nothing but the cod’s own gelatin and olive oil.
Is bacalao al ajoarriero eaten during San Fermín?
Yes. It is one of the definitive dishes of San Fermín week, served at peña tables, gastronomic societies like Napardi, and throughout the bars of Pamplona’s Casco Viejo. It appears alongside rabo de toro and magras con tomate as a pillar of the fiesta table.
Where can you eat bacalao al ajoarriero in Pamplona?
Pa Comé on Calle Comedias 12 in the Casco Viejo serves a traditional version. Bars along Calle San Nicolás and Calle Estafeta typically offer it as a ración during fiesta week. The gastronomic societies — Napardi being the oldest, on Calle Joaquín Jarauta — serve it to members throughout the year.
Every article on the Encierro blog is authored or reviewed by active bull runners with direct experience in Pamplona.