In short: Arguiñano-style Bacalao a la Vizcaína: very slowly cooked (40 min) Basque onion sauce + rehydrated choricero pepper, with no wine or tomato. Strain through a fine-mesh sieve and let rest for 24 h. Cook cod in the sauce for a maximum of 8 min.
Table of contents
Vizcaína sauce: the mother of Basque red sauces
Vizcaína sauce is probably the most exported and reproduced Spanish sauce outside our borders. In Mexico, the Philippines, and many Latin American areas, "bacalao a la vizcaína" is made with its own variations. The original Basque version is distinguished by its base of very slowly cooked onion and rehydrated choricero pepper, WITHOUT tomato or wine.
Karlos Arguiñano's version respects this essence but adds his precise technique: onion cooked exactly 40 minutes over minimum heat, choricero pepper rehydrated in warm water (not hot water, which makes it bitter), and the sauce rested before adding the cod.
Ingredients (4 servings)
- 4 desalted cod fillets (200-250 g each)
- 4-6 choricero peppers (or 5 tbsp choricero paste)
- 6 large onions (or 8 medium)
- 3 cloves garlic
- 1 teaspoon smoked sweet paprika
- 500 ml fish stock or water
- 100 ml EVOO
- Salt, pepper
- Flour for dusting
Step by step (1h 15min cooking time)
- Rehydrate choricero peppers for 30 min in warm water. Scrape off the flesh.
- Slowly cook the onion in a deep saucepan with EVOO: cut into thin julienne, VERY low heat for 40-50 min. The onion should melt, not brown. Add minced garlic in the last 5 min.
- Add the scraped choricero pepper and paprika. Cook for 5 min, mixing well.
- Add stock gradually while it reduces and the sauce integrates. Cook for 15 min more.
- Pass the sauce through a fine-mesh sieve or food mill until completely smooth. Season with salt and pepper.
- Rest for 24 h in the refrigerator (ideal) or 2 h at room temperature.
- To serve: heat the sauce. Sear floured fillets for 30 seconds per side in a pan with EVOO. Transfer to the sauce, cook for 8 minutes over low heat. Serve.
Tips for a perfect Vizcaína
Patience with the onion. 40 min minimum over low heat. If you brown it, the sauce loses sweetness and tastes burnt.
Warm water for the choricero peppers. Hot water makes the flesh bitter. Warm (not hot) hydrates without bitterness.
Always strain the sauce through a fine-mesh sieve. Otherwise, it will be rustic. For restaurant-grade texture, strain it.
Rest for 24 h. The difference between good and memorable. Flavors integrate and deepen.
Cod at the end, maximum 8 min. If you cook it longer, it will dry out. The classic Basque technique: cook gently, move the pot (do not stir).
Premium fillets for your Vizcaína
Extra fillets of Icelandic Gadus morhua, large size, ideal for recipes where cod is the star. Desalted and ready.
Frequently asked questions
Vizcaína vs. Riojana: what's the difference?
What is choricero pepper?
Why so many onions?
How do I get an intense red color?
Should I strain the sauce through a fine-mesh sieve?
Is 24 hours of resting necessary?
Does it contain breadcrumbs or bread pulp?
To finish
Vizcaína is the sauce that separates patient cooks from the rest. 40 minutes of slow-cooking onion may seem like a lot, but the result justifies everything: a profoundly sweet sauce, with no added sugar, that coats cod like no other. If you make it and let it rest for 24 hours, you will have one of the best Basque dishes possible at home.
Bacalalo Cod: the whole range
Artisan selection from Mercat del Ninot. For vizcaína, pil pil, brandada, and more. Premium quality since 1990.
