Bacalhau: The Salt Cod That Portugal Calls Its Faithful Friend

There is a saying in Portugal that there are as many ways to cook bacalhau as there are days in the year, and anyone who has spent a week eating their way through Lisbon and Porto will start to believe it. What makes the claim stranger is that Portugal has a long, generous Atlantic coastline full of sardines, mackerel and octopus, and yet the fish that ended up defining its national cuisine barely swims anywhere near it. Cod lives in cold northern waters off Newfoundland, Iceland and Norway, and it was Portuguese fishermen sailing far from home, sometimes for months at a stretch, who brought it back centuries ago, packed in salt to survive the journey. That practical solution to a logistics problem became a national obsession, and bacalhau earned the nickname fiel amigo, the faithful friend, because in leaner times it was the meal a family could always count on having in the pantry.

Salting cod is not simply about seasoning, it is a full preservation technique. Fresh cod is split, gutted and layered heavily in coarse salt, which draws out moisture and stops bacteria from spoiling the flesh. The result is a stiff, pale, almost leathery fillet that can sit in a cool, dry larder for months. Before it can be cooked, that salt has to come back out again, which means soaking. Thick pieces meant for grilling or baking, known as lombo or posta, usually need 24 to 48 hours submerged in cold water in the fridge, with the water changed three or four times so the flesh rehydrates evenly without turning mushy. Thinner shredded cod, called desfiado or lascas, needs far less, sometimes just 15 to 20 minutes in warm water, which is why it works so well in quick dishes like bacalhau à Brás. Getting this step right is the difference between a cod dish that tastes clean and briny and one that tastes like a block of salt.

Walk into any fish shop or supermarket in 2026 and you will see cod graded by size and cut, with thick centre loins fetching considerably more than tail pieces or the shredded scraps. A good lombo can cost anywhere from 15 to 30 euros per kilo depending on quality and thickness, which explains why bacalhau, historically the poor man's fish, is now often the priciest item on a menu, sometimes 18 to 25 euros for a main course in a mid range restaurant. Travellers are sometimes surprised by this inversion, but it reflects genuine scarcity, as cod stocks in the North Atlantic have been under pressure for decades and Portugal imports almost all of what it consumes, mainly from Norway and Iceland.

The dishes themselves reward exploring beyond the obvious. Bacalhau à Brás, shredded cod fried together with onion, thin matchstick fried potatoes and scrambled egg, finished with black olives and parsley, is the dish most visitors meet first, especially in the tascas of Lisbon's Bairro Alto and Chiado, where it is said to have been invented by a tavern keeper named Brás. Head north to Porto and the signature version becomes bacalhau à Gomes de Sá, a gentler baked casserole of cod, potato, onion and hard boiled egg bound together with olive oil, named after a Porto merchant who supposedly perfected the recipe in the nineteenth century. Bacalhau com natas swaps the egg for a rich bechamel and cream sauce baked until golden on top, comfort food in its purest form and a favourite on cold winter menus. For something closer to a celebration dish, order bacalhau à lagareiro, a thick loin roasted slowly then drenched in fruity olive oil and served alongside batatas a murro, potatoes that are boiled whole then gently smashed open with a fist so they soak up the oil. Bacalhau à Zé do Pipo, a Porto invention layering baked cod with mashed potato and a mayonnaise topping browned under the grill, is another regional classic worth seeking out. And no bacalhau tour is complete without pastéis de bacalhau, small deep fried croquettes of cod and mashed potato bound with egg and parsley, sold everywhere from petiscos bars to bakery counters for two or three euros each.

Bacalhau carries its heaviest symbolic weight on Christmas Eve, at the meal known as consoada. In most Portuguese households the dish served that night is bacalhau cozido, simply poached cod served with boiled potatoes, boiled eggs and coarse green couve cabbage, all dressed with a generous pour of good olive oil. It is deliberately plain, almost austere, a meal meant to mark the fast before midnight mass and the far richer feasting that follows on Christmas Day itself. Travellers visiting in December will notice fishmongers piled high with whole dried cod in the days beforehand, an unmistakable seasonal ritual.

A few places make the cod trail feel less abstract. In Ílhavo, near Aveiro, the Museu Marítimo tells the story of the bacalhoeiros, the fishing boats that once sailed to the Grand Banks off Newfoundland on voyages lasting six months or more, and displays the small dories fishermen used to haul in cod one line at a time in brutal cold. In Viana do Castelo, the Gil Eannes, a retired hospital ship that once supported that same fishing fleet, is now moored as a floating museum and gives a vivid sense of just how far Portugal travelled for this fish. Porto and Lisbon both have countless restaurants built almost entirely around bacalhau, and asking a local for their favourite version rarely fails to start a friendly argument.

For visitors ordering bacalhau for the first time, a few practical notes help. Portions are often generous, so sharing a starter of pastéis de bacalhau before a main is common practice rather than a sign of a small appetite. If a menu lists the cut, lombo alto or lombo will be the thickest, most prized piece, while posta and lascas are leaner and cheaper. Pair it with a crisp Vinho Verde or a structured white from the Douro, both of which cut nicely through the richness of the olive oil, and do not be shy about asking a waiter which regional version the house does best, since nearly every cook in Portugal has a strong opinion about theirs.