Bacalao a la Vizcaína (Salt Cod in Biscayan Sauce)

In Bacalao a la Vizcaína, salt cod is treated gently and served in a deep red Biscayan-style sauce made from slowly softened onions, red peppers, tomato, garlic and sweet paprika. The dish is closely associated with Spanish, particularly Basque, cooking, where preserved cod is prized for its firm flakes and savoury depth once properly soaked. Its character comes from the smooth, olive-oil-rich sauce rather than heavy seasoning: sweet vegetables cook down until concentrated, then the cod is warmed through carefully so it stays tender. Boiled potatoes are a natural partner, giving a simple way to catch every spoonful of sauce.
Cuisine style Basque-style Spanish cooking
Flavor profile Savoury • Rich • Sweet pepper
Techniques Soaking • Slow simmering • Blending
Key equipment Saucepan • Blender
Cooking style Make-ahead friendly

Why this recipe works

  • Slow-built sauce: Onions, peppers and tomatoes cook down gradually in olive oil, creating a sweet, savoury base with depth before the fish is added.
  • Gentle cooking: The cod is warmed through at a low simmer rather than boiled, helping it stay tender while absorbing the sauce.
  • Balanced richness: Tomatoes and red peppers bring brightness and sweetness that balance the olive oil and the natural salinity of the cod.

Get the most out of this recipe

Timing notes

  • Plan for soaking: Salt cod needs a long soak in cold water before cooking, with several water changes to draw out excess salt.
  • Most of the work is passive: The active preparation is modest, but the sauce benefits from slow cooking and the fish requires advance desalting.
  • Rest before serving: A short rest off the heat lets the cod settle in the sauce and helps preserve its succulent texture.

Authenticity notes

  • Biscayan style: The dish is associated with the Basque Country, where salt cod is commonly paired with a red pepper-based sauce.
  • Home-style texture: Blending the vegetables gives a smooth sauce that clings to the fish and potatoes rather than sitting loosely in the pan.
  • Pepper character: Sweet red pepper and paprika give the sauce its recognisable colour and gentle warmth without making the dish spicy.

Ingredient notes

  • Choose good salt cod: Look for firm, evenly salted pieces of cod; thinner pieces will desalinate and cook more quickly than thick fillets.
  • Use sweet paprika: Sweet paprika supports the pepper flavour without adding heat. Smoked paprika will make the sauce deeper and more assertive.
  • Tomato choice matters: Ripe tomatoes give the sauce freshness, while good canned whole tomatoes can provide a smoother, sweeter result when fresh tomatoes are not at their best.

Common mistakes

  • Not desalting enough: Taste a small piece after soaking; if it still tastes aggressively salty, continue soaking with another water change.
  • Boiling the cod: Once the fish is in the sauce, keep the heat very low. Boiling can toughen the cod and disturb the sauce.
  • Packing the fish too tightly: Arrange the cod in a single layer so it heats evenly and can be turned without breaking.

Equipment you'll need

Ingredients
Instructions
Print
  1. Rinse the salted cod, then put it in a bowl and cover with cold water. Soak for 24 hours in the fridge, changing the water 3 to 4 times. Drain well and pat dry.
  2. Halve and deseed the red peppers, then slice them. Peel and thinly slice the onions, and peel and finely slice the garlic.
  3. Warm the olive oil in a saucepan over medium-low heat. Add the onions with a pinch of salt and cook for 20 to 25 minutes, stirring often, until very soft and sweet but not browned.
  4. Stir in the garlic and cook for 1 minute until fragrant. Add the red peppers and cook for 10 minutes, stirring, until they begin to soften.
  5. Stir in the sweet paprika for 30 seconds. Add the tomatoes and bay leaves, then reduce to a gentle simmer and cook for 35 to 45 minutes until thick, deep red, and the oil begins to separate slightly at the edges.
  6. Remove and discard the bay leaves. Blend the sauce until smooth, then return it to the pan and keep it at the gentlest simmer.
  7. Nestle the cod into the sauce in a single layer. Cook over low heat for 8 to 12 minutes, turning once, until the fish is opaque and flakes easily; do not let the sauce boil.
  8. Rest off the heat for 5 minutes so the cod stays succulent. Serve hot with the sauce spooned over.

Made this recipe? Rate it — a comment is optional.

Recipe notes

Serving suggestions

This recipe pairs well with:

Boiled potatoes

Tips

  • Taste a small piece of the soaked cod before cooking; if it is still very salty, soak for a few more hours with one extra water change.
  • Keep the heat low once the cod goes in: boiling can make the fish tough and can split the sauce.
  • If serving vulnerable groups, make sure the cod is cooked until fully opaque and flakes easily all the way through.

Substitutions

  • Replace Tomato with canned whole peeled tomatoes for a smoother, sweeter sauce.
  • Replace Sweet paprika with smoked paprika for a deeper, smoky flavour.
  • Replace Olive oil with extra-virgin olive oil for a fruitier finish.

Storage

  • Refrigerate up to 2 days
  • Cool, then refrigerate in a sealed container. Reheat gently in a saucepan over low heat until piping hot, avoiding boiling so the cod stays tender.

Ratings & reviews

Liked this recipe? Share your feedback to support our cooking community.

Tried this recipe?

Choose 1–5 stars. A comment is optional.

If you leave a comment, use 10–500 characters.

Stay inspired

Discover new recipes, seasonal favourites and cooking inspiration every day. Follow JustRecipes on Pinterest and Spillt.

Bacalao a la Vizcaína (Salt Cod in Biscayan Sauce)
Image by JustRecipes
Pinterest

Recipe overview

  • Servings: 4 servings
  • Total time: 3h 10min (35min active)
  • Difficulty: Medium
  • Cuisine: Spanish
  • Allergens:
    Fish
With serving suggestions

Plan your meals and get a complete grocery list automatically.

Add to meal planner

Equipment you'll need

Advertisement

Recommended tools for this recipe

Best overall

WMF Mini Saucepan 16 cm with Lid

Compact stainless steel saucepan
  • High-quality stainless steel
  • Even heat distribution
  • Higher price point

Got ingredients left?

Find recipes using ingredients from this recipe or what you already have at home.

Find recipes with these ingredients →

Make this recipe easier next time

Advertisement

These tools help you get better results with less effort.

Best overall

WMF Mini Saucepan 16 cm with Lid

Compact stainless steel saucepan
  • High-quality stainless steel
  • Even heat distribution
  • Higher price point
Best value

T-fal Specialty Nonstick Handy Pot with Glass Lid 3 Quart

Affordable nonstick saucepan
  • Easy food release
  • Dishwasher safe
  • Not induction compatible
Top quality

All-Clad Tri-Ply Stainless Steel Saucepan

Professional-grade tri-ply saucepan
  • Excellent heat control
  • Premium build quality
  • Expensive

Browse alphabetically

Looking for a specific recipe? Choose a letter below to jump directly to recipes starting with that letter or number.

Enjoy cooking with JustRecipes?

Add JustRecipes as one of your preferred Google sources to discover our recipes more easily across Google Search.

Add JustRecipes to Google

Every recipe on JustRecipes follows the same structured editorial process. Learn how recipes are created, validated, translated, illustrated, and continuously improved across the platform. How we create recipes.