Cod Vizcaya Style: Grandma's Recipe Step by Step [Easy]

What is Bacalao a la Vizcaína

Bacalao a la Vizcaína is one of the flagship dishes of Basque gastronomy and, by extension, of all Spanish cuisine. Born in the kitchens of Biscay, it combines two ingredients that defined the food identity of the Cantabrian region for centuries: salted cod brought by fishermen from Newfoundland and Iceland, and choricero peppers cultivated in Basque farmhouses.

Its origin dates back to the 18th century, when salted cod was the main Lenten protein in the Basque Country. Cooks in Bilbao and the coastal towns of Biscay developed this recipe as a way to transform a dry, salted fish into a sumptuous dish, thanks to a sauce that requires hours of patience but rewards with a depth of flavor difficult to surpass.

Unlike Bacalao al Pil Pil or Bacalao en Salsa Verde, which are relatively quick preparations, Vizcaína is a dish of slow cooking. The onion must be poached for at least an hour, the choricero peppers need to be rehydrated, and the sauce is strained to achieve that velvety texture that distinguishes it. It is grandma's cooking, Sunday cooking, celebration cooking.

The secret: Vizcaína sauce

Vizcaína sauce is the soul of the dish. Without it, you just have cooked cod. With it, you have one of the best dishes of Basque cuisine. Its base consists of three elements: choricero peppers, poached onion, and broth (fish or from the cod's desalting water).

Choricero peppers are key. They are dried peppers of the Capsicum annuum variety, traditionally grown in the Basque Country and Navarre. When rehydrated, their pulp provides a sweet, slightly smoky flavor, with an intense red color that defines Vizcaína. They are not spicy: they provide sweetness and depth.

The onion is slowly poached over very low heat for 45-90 minutes until it breaks down and caramelizes gently. This slow cooking eliminates acidity and generates natural sugars that balance the sweetness of the choricero pepper. Many Basque grandmas say that "Vizcaína makes itself, it just needs time", and they are right: low heat and patience are irreplaceable.

Once the onion is poached and the choricero pulp is added, the sauce is blended and strained through a chinois or fine sieve. This removes skins and fibers, leaving a silky, dense, dark red cream that envelops the cod like a blanket.

Table: Choricero peppers vs. ñora vs. piquillo

Choosing the right pepper makes the difference between an authentic Vizcaína and an approximation. This table compares the three most common options:

If you can't find choricero peppers, use ñoras as a substitute: you'll need 30% more to compensate for the lower intensity. Some chefs mix 2/3 choricero and 1/3 ñoras to round out the flavor. Piquillo peppers alone produce a sauce that is too watery and lacks the necessary depth, but you can add a couple to the mix for freshness.

Ingredients for 4 servings

• 4 desalinated cod loins -- 200-250 g each, minimum 2.5 cm thick. You can use professional desalinated cod ready to cook.
• 8-10 dried choricero peppers -- Basque or Navarre quality. Alternatively, 4 heaped tablespoons of preserved choricero pepper pulp.
• 3 large onions -- finely julienned. Approximately 600 g.
• 4 cloves garlic -- finely chopped.
• 1 ripe tomato -- grated (optional, some versions do not include it).
• 100 ml extra virgin olive oil -- mild, arbequina type.
• 200 ml fish broth -- or water from the last desalting change. If not available, hot water.
• 1 teaspoon sweet paprika -- optional, enhances color.
• Flour -- for dusting the cod (1-2 tablespoons).
• Salt -- only if necessary. Remember that cod adds saltiness.

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How to prepare Vizcaína sauce step by step

The sauce can (and should) be prepared in advance. Many Basque cooks make it the day before because it rests and matures better. These are the steps:

1. Rehydrate the choricero peppers. Place them in a bowl with hot (not boiling) water for 30 minutes. Once soft, open them, remove the seeds, and scrape out the pulp with a spoon. Discard the outer skin. Reserve the rehydration water.
2. Poach the onion. Heat the oil in a large saucepan over low heat. Add the julienned onion and minced garlic. Cook, stirring occasionally, for 45-60 minutes until the onion is completely broken down, translucent, and lightly golden. This step is non-negotiable: poorly poached onion yields an acidic sauce without body.
3. Add the choricero pulp and tomato. Incorporate the scraped pulp and, if using, the grated tomato. Sauté for 10 minutes over medium-low heat, stirring to combine.
4. Add the broth. Pour in the fish broth or the choricero rehydration water, which adds flavor and color. Cook over low heat for 15-20 minutes to concentrate the flavors.
5. Blend and strain. Blend the sauce until it forms a homogeneous cream. Then, strain it through a chinois or fine sieve, pressing with a spoon to extract all the pulp. The final texture should be dense, silky, with no lumps or skins.
6. Adjust seasoning. Taste the sauce and adjust salt if necessary. If it's too thick, add a tablespoon of broth. If it's too thin, reduce over low heat for another 5-10 minutes. The correct color is dark red, almost burgundy.

Complete Bacalao a la Vizcaína recipe step by step

With the sauce already made, assembling the dish is relatively simple. These are the steps for a professional result:

1. Dry the cod. Remove it from the desalting water and dry thoroughly with paper towels. Surface moisture prevents searing and splatters when it comes into contact with hot oil.
2. Lightly flour. Dust the loins with flour, shaking off the excess. The flour forms a thin crust that protects the fish and slightly thickens the sauce during cooking.
3. Sear the cod. In a frying pan with two tablespoons of oil over medium-high heat, brown the loins for 2 minutes on each side. Do not overcook them: you are only looking for external golden color. Reserve on absorbent paper.
4. Preheat the casserole. If using a clay pot (ideal), preheat it gradually to prevent cracking. If using an iron or steel pot, this step is not necessary.
5. Pour in the sauce. Place the Vizcaína sauce in the casserole over medium-low heat. It should bubble gently, never boil furiously.
6. Add the cod. Place the loins on the sauce, skin-side up. Spoon sauce over the top.
7. Cook over low heat for 15-20 minutes. Gently move the casserole in circular motions every 3-4 minutes so that the sauce envelops the cod. Do not use a spoon to move the loins: they would break.
8. Check doneness. The cod is ready when the flakes separate easily when gently pressed with a fork. The flesh should be juicy inside, never dry.
9. Rest for 5 minutes. Remove from heat and let rest covered. The sauce settles and the cod absorbs more flavor.
10. Serve in the casserole. Vizcaína is traditionally served in the same clay pot, directly from the stove to the table.

Easy and quick version of Bacalao a la Vizcaína

If you don't have an hour to poach onions, this easy version of Bacalao a la Vizcaína reduces the time to 35-40 minutes without sacrificing too much flavor:

• Use preserved choricero pulp (sold in jars in Basque stores and online). This saves you 30 minutes of rehydration and scraping.
• Cut the onion into a fine brunoise instead of julienne. Being smaller pieces, it poaches in 25-30 minutes instead of 50.
• Add a pinch of sugar (half a teaspoon) when poaching the onion to speed up caramelization.
• Use professional desalinated cod. This saves you 36-48 hours of desalting. Bacalalo's desalinated cod loins come with the perfect amount of salt.
• Skip the straining step if you blend well with a powerful blender. The result is slightly less fine but perfectly acceptable for a weeknight dinner.

The quick order: poach onion (25 min) + mix with choricero pulp and broth (10 min) + blend + sear cod (4 min) + cook in sauce (15 min) = less than 1 hour total.

Grandma's recipe: traditional Bacalao a la Vizcaína

The grandma's recipe for Bacalao a la Vizcaína is distinguished by three details that modern versions often omit:

First, the base sofrito with ham. Basque grandmas would add a piece of bacon or cured ham (about 50g, finely chopped) at the beginning of the sofrito, before the onion. The fat from the ham provided an umami flavor that rounded out the sauce. You'll find this step in Nicolasa Pradera's cookbooks and in many gastronomic societies.

Second, very long onion poaching. Grandmas would poach the onion for an hour and a half or even two hours, stirring with a wooden spoon, until the onion practically dissolved into a sweet marmalade. This extreme patience produces a sauce with a depth of flavor that 45 minutes cannot replicate.

Third, fried bread. Some grandma's versions include a slice of day-old bread, fried in oil and added when blending the sauce. The bread gives it extra body and a touch reminiscent of the thick sauces of old Basque cuisine, such as the sauce for squid in its own ink.

To follow this version, use the complete recipe above but incorporate the bacon at the beginning, extend the onion poaching to 90 minutes, and add a slice of fried bread before blending.

Arguiñano's method

Karlos Arguiñano, the most media-savvy Basque chef, has his own version of Bacalao a la Vizcaína which has become very popular on television. His method differs in several points:

• Green pepper in the sofrito. Arguiñano adds half a finely chopped green pepper along with the onion, something that purist Bizkainos do not approve of but which provides a fresh counterpoint.
• White wine. He deglazes the sofrito with a splash of white wine (ideally txakoli) before adding the choricero pulp. The alcohol evaporates and leaves an acidity that balances the sweetness.
• Less poaching time. Arguiñano poaches the onion for about 30-40 minutes, compensating with a longer final cooking of the complete sauce.
• Presentation with hard-boiled egg. In his version, he often crowns the dish with slices of hard-boiled egg and strips of rehydrated choricero pepper, a classic Basque touch for festive Vizcaínas.

Arguiñano's result is a somewhat fresher and lighter Vizcaína than the traditional version, ideal if you are looking for a less concentrated flavor.

What kind of cod to use for Vizcaína

Vizcaína is a hearty dish where the sauce dominates, but that doesn't mean any cod will do. You need pieces that hold their structure after 15-20 minutes in the sauce.

The best option is thick loins or small loins, desalinated and with skin. The skin provides gelatin that slightly thickens the sauce during cooking. If you prefer a more unctuous texture, desalinated cod snout is extraordinary for Vizcaína.

The cod should be from cold waters (Iceland, Norway, Faroe). Cold-water cod has firmer flesh, higher protein content, and withstands prolonged cooking in sauce better. Cod from temperate waters tends to fall apart. More information in our guide to recipes with desalinated cod.

How to desalt cod for Vizcaína

If you start with dried salted cod, you need to desalt it correctly. Poor desalting ruins Vizcaína: too much salt masks the sauce, and too little leaves the cod bland.

1. Cut into portions before desalting. Individual pieces desalt faster and more uniformly than a large block.
2. Submerge in abundant cold water (3 liters per 500 g of cod). Place the piece skin-side up so the salt falls by gravity.
3. Change the water 3 times within 36-48 hours: at 12, 24, and 36 hours. Always keep in the refrigerator (5-8 degrees C).
4. Taste before cooking. Cut a corner, boil for 30 seconds in water, and taste. It should be barely salty, because Vizcaína sauce has no added salt.

If you prefer to avoid this process, Bacalalo's desalinated cod loins come with the exact salt point, ready to cook in less than a minute of preparation.

Nutritional table and variant comparison

These are the approximate values per serving (a 220g loin with sauce) of Bacalao a la Vizcaína and its variants:

Bacalao a la Vizcaína is a moderately caloric dish thanks to the olive oil, but rich in high-quality proteins and monounsaturated fats. The Vizcaína sauce, being vegetable-based (onion, pepper), provides fiber and vitamins A and C from the choricero pepper.

Accompaniments and presentation

Vizcaína is traditionally served in a clay pot, with the sauce generously covering the loins. These are the classic accompaniments and some alternatives:

• Boiled potatoes. The canonical accompaniment. Cut into thick slices and cooked separately, they are added to the casserole for the last 5 minutes to absorb the sauce.
• Farmhouse bread. Essential for dipping in the sauce. A good rustic bread with a crispy crust and spongy crumb.
• Piquillo peppers. Whole or in strips, they provide a sweet counterpoint that complements without competing.
• Hard-boiled egg. Sliced, it's the classic Basque touch for festive Vizcaínas.
• White rice. Less traditional but functional: it absorbs the leftover sauce.
• Green salad. Lettuce, endive, or lamb's lettuce with a light vinaigrette: the fresh contrast that balances the richness of the dish.

For presentation, place the loins centered in the casserole, generously bathe with sauce, and decorate with a few strips of rehydrated choricero pepper on top. If you want a modern touch, a sprig of fresh parsley adds color.

Wine pairing: Txakoli, Rioja and more

Vizcaína is a dish with intense flavor, sweet from the onion and pepper, slightly fatty from the oil. It needs wines that balance without dominating:

• Txakoli de Getaria (Getariako Txakolina). The natural pairing. Its high acidity, subtle bubbles, and marine saltiness cut through the fat and refresh the palate between bites. Serve very cold, at 6-8 degrees C.
• Rioja Crianza. A young red with good acidity and soft tannins complements the sweetness of the choricero pepper without overwhelming the cod. Look for Crianza wines made from Tempranillo with 12-14 months in barrel.
• Godello or Albariño. Galician whites with enough body to withstand the intensity of the sauce. Godello, with its mineral notes, works especially well.
• Navarran Rosé. A Navarran Grenache rosé with good structure provides versatility: it works with the sauce and refreshes like a white wine.
• Traditional Basque cider. The informal option. Its acidity and natural carbonation wonderfully cleanse the palate. Ideal if serving Vizcaína at a txoko or cider house meal.

Variations: with clams, prawns, gratin

Vizcaína sauce is so versatile that it allows for multiple variations on the basic recipe:

Bacalao a la Vizcaína with clams. Add 500g of clams (previously purged in salted water for 2 hours) to the casserole during the last 5 minutes of cooking. They will open with the heat of the sauce and release a marine juice that enhances the overall flavor. Discard any that don't open.

Bacalao a la Vizcaína with prawns. Sear 8-12 peeled prawns (leave tails on) in a separate pan for 1 minute per side. Add them to the casserole along with the cod during the last 3 minutes. Prawns add sweetness and elegance without altering the base sauce.

Gratin Bacalao a la Vizcaína. Once the cod is cooked in its sauce, cover it with a thin layer of light béchamel or simply grated Parmesan cheese. Gratin in the oven at 220 degrees C for 5-7 minutes until golden brown. The crispy crust contrasts with the smoothness of the sauce and cod.

Vizcaína with eggs. In the Basque Country, poached eggs are served over Vizcaína sauce as a Lenten dish. Heat the sauce in an individual casserole, make a well, and crack an egg. Cover and cook for 4-5 minutes until the egg white sets. A spectacular dinner with minimal effort.

Storage and how to reheat

Bacalao a la Vizcaína is one of those dishes that improves with resting. Well-preserved, the next day the sauce has penetrated further into the cod and the flavors integrate.

• In the refrigerator: up to 3 days in an airtight container. Store the sauce and cod together so it continues to marinate.
• In the freezer: up to 2 months. Freeze in individual portions with plenty of sauce. Vizcaína sauce freezes very well; the cod loses some texture but is still good.
• To reheat: always over low heat in a pot, never in the microwave. Add a tablespoon of broth or water if the sauce has thickened too much. Heat for 8-10 minutes, gently shaking the pot. The cod should reach temperature without boiling.
• The sauce alone keeps for 5 days in the refrigerator and 3 months in the freezer. Prepare a double batch and you'll have Vizcaína sauce ready for next time.

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Tips for a perfect Vizcaína

1. Patience with the onion: 80% of the success of this sauce lies in the slow poaching of the onion. If you rush it, the sauce will have a raw flavor and a grainy texture.
2. Good choricero peppers: the quality of the pepper determines the color and flavor of the sauce. Look for choricero peppers from Rioja or Navarra, which have thicker, sweeter flesh.
3. Always strain the sauce: passing it through a chinois or strainer removes fibers and skins that ruin the velvety texture.
4. Do not stir with a spoon: move the pot with gentle circular motions so that the cod does not break but the sauce thickens well.
5. Make the sauce the day before: Vizcaína sauce gains a lot of flavor with 24 hours of rest in the refrigerator. Make the sauce one day, assemble the dish the next.
6. Save the desalting water: the last water from desalting the cod contains collagen and gelatin. Use it as part of the liquid in the sauce for a silkier texture.

Common mistakes when making Bacalao a la Vizcaína

• Adding tomato: the original recipe does not include tomato. If you add it, you get a tasty dish but not an authentic Vizcaína. The red color comes only from the choricero peppers.
• Burning the onion: if the onion browns too quickly, the sauce will have a bitter taste. Low heat and patience.
• Sauce too thin: if the sauce is too thin, reduce it over low heat before adding the cod, or add more bread to thicken.
• Overcooking the cod: in the final cooking, the cod only needs 10-15 minutes in the sauce. If you cook it longer, it will fall apart and lose its flaky texture.
• Using loins that are too thin: thin cuts break easily in the sauce. Always use thick loins of 3-4 cm.
• Insufficient desalting: poorly desalted cod with excess salt will ruin all the work of the sauce. Check the saltiness by cutting a corner and tasting it.

Related guides

• Bacalao al pil pil: Basque recipe step by step
• Bacalao in green sauce: traditional recipe
• Baked cod with potatoes: definitive recipe
• Recipes with desalinated cod: quick and easy ideas
• Cod croquettes: creamy recipe step by step
• Premium desalinated cod from Iceland
• Dried salted cod: all cuts

Get the perfect cod for your Vizcaína: desalinated cod loins ready to cook, desalinated cod snout for a gelatinous texture, or the Grand Reserve Cod Box to try all the cuts. Refrigerated shipping throughout Spain in 24-48 hours. At Bacalalo we only work with cod from Iceland and Norway, selected for recipes that demand uncompromising quality.