Bacalao a la Vizcaína: Basque Salt Cod in Red Pepper Sauce

One of the best parts of running this site is hearing from our followers on Facebook. Recently, someone suggested I try Bacalao a la Vizcaína, and honestly? I got excited immediately.

This Basque classic has been on my radar for years, but that nudge pushed me to finally dive in, and I’m so glad I did. If you have recipe ideas you’d love to see on our site, send them our way on Facebook, we love trying new recipes and sharing them with you.

Salt cod might sound intimidating if you’ve never worked with it before, but here’s the truth: it’s one of the most rewarding seafood ingredients you can learn to cook. Bacalao a la Vizcaína transforms that salted, dried fish into something buttery, tender, and deeply savory in a silky red pepper sauce that’s unlike anything else. It’s the kind of dish that feels fancy enough for a special dinner but is totally doable in your home kitchen.

This isn’t a rushed recipe, and that’s actually the beauty of it. The soaking, the slow caramelization of onions, the gentle simmering, these steps teach you patience and respect for your ingredient.

By the end, you’ll understand why salt cod has been treasured in coastal kitchens for centuries.

Table of Contents

What is Salt Cod (and Where to Find It)

Salt cod, or bacalao, is simply fresh cod that’s been salted and dried as a preservation method. It’s a staple in Mediterranean, Basque, and Caribbean cooking, and once you understand how to desalt it, you’ve unlocked a whole world of traditional seafood dishes.

The ingredient looks intimidating, sure. It’s stiff, pale, and very salty straight from the package. But that’s exactly why we soak it for 24 to 48 hours, changing the water several times. This process rehydrates the fish and removes the excess salt, leaving you with tender, flaky cod that’s ready to cook. Think of it as rebuilding the fish to its fresh state, but with deeper flavor.

Quality matters here. Look for thick, white pieces without dark spots or discoloration. The flesh should be pale, not yellow or brown. Good salt cod has a clean, oceanic smell, not a funky or overly fishy one.

Where to buy salt cod:

You’ll find salt cod at specialty markets, Mediterranean delis, and online retailers. Try Spanish or Portuguese import shops first (they usually carry the best quality). Online options include specialty seafood retailers and even Amazon if your local options are limited. Look for brands labeled “bacalao desalado” (already partially desalted) if you’re short on time, though fully salted versions give you better control over the final flavor.

For the other specialty ingredients, jarred piquillo peppers (roasted red peppers from Spain) and dried choricero peppers are worth ordering online if your grocery store doesn’t carry them. Choricero peppers are the heart of this sauce, so don’t skip them if possible. If you absolutely can’t find them, ñora peppers are a decent substitute.

Storage tip: Keep dried salt cod in a cool, dry place in an airtight container. Once you’ve soaked and cooked it, store leftovers in the fridge for up to 3 days, or freeze for up to 2 months.

Did you know? Salt cod was so important to European trade routes that it literally shaped the history of the Atlantic. Fishermen would salt-preserve their catch to ship across the ocean, and bacalao became a currency of its own.

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Ingredients You’ll Need

Here’s everything you’ll need to make an authentic Bacalao a la Vizcaína that serves 4 people.

• 1.5 lbs salt cod (dried, whole fillets, not pre-shredded)
• 4 dried choricero peppers (or ñora peppers as backup)
• 4 medium onions (sliced into thin half-moons)
• 6 cloves garlic (minced)
• 1 cup roasted piquillo peppers (jarred, drained)
• 2 tablespoons tomato paste
• 1 cup fish stock (or filtered salt cod soaking water)
• 1/2 cup extra virgin olive oil (good quality, you’ll need it)
• 3 hard-boiled eggs (for garnish)
• Sea salt and freshly ground black pepper (to taste)
• Crusty bread (for serving)

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Step-by-Step Instructions

Making Bacalao a la Vizcaína requires patience, but each step is straightforward and teaches you something valuable about working with seafood.

Step 1: Soak the Salt Cod (24-48 Hours Before)

Place your salt cod pieces in a large bowl and cover completely with cold water. Change the water 3 to 4 times over 24 to 48 hours, tasting a small piece each time to check the salt level. The fish should taste mildly salty, not like the ocean. Once desalted, drain and pat dry with paper towels.

This is the most important step. Don’t rush it. The soaking time transforms the fish from stiff and impossibly salty to tender and ready to cook.

Pro tip: Save the filtered soaking water (after the final soak). It makes excellent fish stock for this recipe.

Step 2: Prepare the Dried Peppers

While your cod soaks, heat 1 cup of water until steaming. Pour it over your choricero peppers in a bowl and let them soak for 30 minutes until soft. Once soft, drain them and scrape the flesh away from the tough skin using a spoon or knife. Discard the skin and set the pepper flesh aside. You should have about 1/2 cup of smooth pepper paste.

Don’t skip this step. The dried peppers are what give this dish its signature deep, slightly sweet, smoky flavor.

Step 3: Slowly Caramelize the Onions

Heat your olive oil in a large, heavy-bottomed pot or Dutch oven over medium heat. Add your sliced onions and cook slowly for 30 to 40 minutes, stirring occasionally. You want them to become golden, soft, and slightly jammy. This isn’t a quick sauté, it’s a patient transformation.

As the onions cook, they’ll release their sweetness and develop depth. This long cook is what makes the sauce silky and luxurious. Don’t rush it by turning up the heat.

Step 4: Build the Sauce Base

Once the onions are deeply golden, add your minced garlic and cook for 1 minute until fragrant. Stir in the tomato paste and cook for another minute to deepen its flavor. Now add your choricero pepper flesh and the piquillo peppers. Stir everything together and cook for 5 minutes.

You should have a thick, fragrant mixture at this point. This is the foundation of your sauce.

Step 5: Blend and Simmer the Sauce

Pour the entire mixture into a blender and blend until completely smooth. Return it to the pot over medium heat. Add your fish stock (or filtered soaking water) and stir well. Simmer for 10 minutes to let the flavors meld together. Taste and adjust salt and pepper as needed.

The sauce should be silky, slightly thick, and deeply flavored. If it’s too thick, add a bit more stock. If it seems thin, simmer a bit longer.

Step 6: Gently Add the Salt Cod

Pat your desalted cod pieces dry one more time. Carefully nestle them into the simmering sauce. The pieces should be mostly submerged. Reduce the heat to low and simmer very gently for 15 to 20 minutes. The cod is done when it flakes easily with a fork and is tender but not falling apart.

This is the most delicate step. You want the fish to cook gently so it stays tender and doesn’t become rubbery. Resist the urge to stir, just let it cook.

Step 7: Garnish and Serve

Slice your hard-boiled eggs and arrange them on top of the bacalao. Drizzle with a bit more olive oil if you’d like. Serve immediately with crusty bread to soak up every drop of that incredible sauce.

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Why This Dish Works

The magic of Bacalao a la Vizcaína comes from how each element supports the others. The long soaking removes salt from the cod but keeps the deep seafood flavor. The patient caramelization of onions creates a naturally sweet base that balances the richness of the sauce. The dried peppers add complexity and a subtle smokiness that makes you wonder why you haven’t used them before.

When the tender cod pieces meet that silky sauce, you understand why this dish has endured for centuries in Basque kitchens. It’s not complicated, but it respects its ingredients and the time it takes to prepare them properly.

The hard-boiled eggs aren’t just a garnish, they add richness and a touch of protein to every spoonful. They’re traditional for good reason.

Fast fact: The average piece of salt cod loses about 50% of its weight during the soaking and cooking process as it rehydrates. That’s why one pound of dried salt cod yields the equivalent of fresh cod, but with exponentially more flavor.

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Serving Suggestions and Pairings

Bacalao a la Vizcaína is rich and deeply satisfying, so your sides should be simple and fresh to balance it. Serve with thick slices of crusty bread (toasted with a bit of olive oil is perfect) for soaking up the sauce. A simple green salad with lemon vinaigrette cuts through the richness beautifully.

For wine, choose something with good acidity. A crisp Albariño from Spain is the traditional pairing, or a dry Sauvignon Blanc works wonderfully. If you prefer red, a light Pinot Noir won’t overpower the delicate fish.

Plate it with the cod nestled in the center of a shallow bowl, sauce pooled around it, sliced hard-boiled egg on top, and a piece of bread alongside. This is the kind of dish that deserves a moment to admire before you dig in.

Did you know? In Basque country, this dish is often served during religious holidays and special occasions because salt cod was historically more affordable than fresh fish for inland communities. It became a symbol of celebration and tradition.

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Storage and Make-Ahead Tips

What	How to Store	How Long	Notes
Cooked bacalao with sauce	Airtight container in fridge	3 days	Reheat gently over low heat with a splash of fish stock
Sauce only (without fish)	Airtight container in fridge	5 days	Can be made 2 days ahead; add cod the day of serving
Cooked bacalao with sauce	Freezer-safe container	Up to 2 months	Thaw overnight in fridge; reheat gently
Desalted cod (uncooked)	Airtight container in fridge	2 days	Best used within 24 hours of soaking

The sauce actually improves slightly if made a day ahead, as the flavors meld together more deeply. This makes Bacalao a la Vizcaína a great dish for entertaining, since you can prep the sauce and simply add the cod to cook right before serving.

When reheating, go low and slow. You want to warm everything through without cooking the fish further. A few minutes over low heat with the lid on is all it needs.

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FAQs About Salt Cod and This Recipe

Can I use fresh cod instead of salt cod?

No, and here’s why. Fresh cod has a mild, delicate flavor. Salt cod has been concentrated through the salting and drying process, so it has deeper, more complex seafood flavor. Fresh cod would disappear into the sauce. Salt cod stands up to it beautifully. If you can’t find salt cod, this recipe truly isn’t the same, so I’d suggest waiting until you can source it properly.

Where exactly can I buy salt cod?

Check Spanish or Portuguese specialty markets first, Mediterranean delis, or your local fishmonger (many carry it or can order it). Online retailers like specialty seafood shops, import stores, or even some mainstream online grocers carry it. Search “bacalao” or “salt cod” to find reliable sellers. Quality matters, so read reviews before ordering.

How do I know when the cod is desalted enough?

Taste a small piece after the final soak. It should taste mildly salty, not like seawater. If it’s still too salty, do one more water change and soak for another 12 hours. There’s no harm in soaking longer if you’re unsure.

Can I use other peppers instead of choricero peppers?

Ñora peppers work as a substitute and will give a similar result, though slightly less smoky depth. Dried ancho or guajillo peppers (from Mexican cooking) won’t work, they have a different flavor profile. If you can’t find either, roasted red peppers from a jar plus a pinch of smoked paprika can approximate the flavor, but it won’t be traditional.

Can I make this in advance?

Yes. Make the entire sauce 1 to 2 days ahead and store it in the fridge. When you’re ready to serve, gently reheat the sauce, then add your desalted cod and simmer for 15 to 20 minutes as directed. This actually makes entertaining easier since the hardest part is done.

Did you know? Portugal consumes more salt cod per capita than any other country in the world, with over 1,000 traditional recipes using it. Bacalao is deeply woven into Iberian coastal culture.

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Time to Cook Bacalao a la Vizcaína

This is a special recipe, and it deserves a moment in your kitchen. The soaking might seem like a barrier, but it’s actually the gift. You soak the cod, and while you wait, you’re anticipating the meal. You caramelize the onions slowly, and in that time, you understand why patience matters in cooking. Then the fish goes in, and everything comes together in about 20 minutes of gentle simmering.

When you sit down to eat this dish, you’ll taste all that care. You’ll taste the ocean in the cod, the sweetness of those perfectly caramelized onions, the complexity of the peppers, and the silkiness of the sauce. It’s the kind of meal that reminds you why we cook from scratch.

If you make this recipe, I’d love to hear about it. Drop a comment below and let me know how it turned out. Did you find the salt cod easily? Did the sauce come together the way you hoped? And hey, if you have other seafood recipes you want to see on our site, send them our way on Facebook.

Happy cooking, and enjoy every spoonful of this Basque treasure.