Portuguese Bacalhau à Brás: A Classic Cod and Potato Dish

Portuguese bacalhau à Brás is a comforting Lisbon-style dish of salted cod, crisp shoestring potatoes, and softly set eggs, usually finished with olives and parsley. The ingredients are cooked separately and gently folded together, so the fish stays tender and the potatoes keep some texture; recipes vary in how crisp or creamy they make the eggs.

Ingredients

12 oz (340 g) boneless, skinless salt cod, desalted (about 10 oz/285 g after soaking and draining)
8 oz (225 g) matchstick potatoes or shoestring fries, fresh or frozen
3 tbsp (45 ml) olive oil, divided
1 medium yellow onion, thinly sliced (about 7 oz/200 g)
2 garlic cloves, finely chopped (about 6 g)
6 large eggs
2 tbsp (30 ml) whole milk or water
¼ tsp ground black pepper
¼ cup (35 g) pitted black olives, halved
¼ cup (10 g) chopped fresh flat-leaf parsley, divided
Salt, as needed (often none; taste before adding)
1 lemon, cut into wedges, for serving (about 2 tbsp/30 ml juice)

Instructions

Desalt the cod, if needed. Salt cod must be soaked before cooking. Rinse it, place it in a bowl of cold water in the refrigerator, and soak for 24–36 hours, changing the water every 6–8 hours. Thick pieces may need longer. Taste a small cooked flake; if it is still very salty, continue soaking. Drain and pat dry. This soaking time is not included in the recipe-facts times. If using cod sold already desalted, skip this step and check its label.
Prepare the cod. Put the drained fish in a saucepan and cover with fresh water. Bring just to a gentle simmer over medium heat, then cook for 5–8 minutes, until it flakes easily and reaches the USDA FSIS safe minimum internal temperature for fish of 145°F (63°C), checked with a food thermometer in the thickest part. Drain, cool briefly, remove any remaining bones, and flake into bite-size pieces.
Cook the potatoes. Prepare the matchstick potatoes according to their type: fry fresh potatoes in 1 tablespoon (15 ml) of the oil at 350°F (175°C) until crisp and golden, about 4–6 minutes per batch, or bake or air-fry frozen shoestring potatoes according to the package directions. Drain on paper towels if fried. Set aside. Avoid salting heavily because the cod and olives can be salty.
Soften the onion. Heat the remaining 2 tablespoons (30 ml) olive oil in a large nonstick or well-seasoned skillet over medium-low heat. Add the onion and cook for 8–10 minutes, stirring now and then, until soft and translucent but not browned. Stir in the garlic and cook for 30 seconds.
Warm the cod and potatoes. Add the flaked cod to the skillet and fold gently through the onion. Cook for 1–2 minutes to warm it. Add the potatoes and fold again, taking care not to crush them.
Cook the eggs gently. Whisk the eggs with the milk or water and black pepper. Reduce the heat to low and pour them into the skillet. Stir and fold continuously for about 2–4 minutes, scraping the bottom and sides, until the eggs are softly set and no longer runny. Because this is an egg dish, use a food thermometer to confirm it reaches the USDA FSIS safe minimum of 160°F (71°C); avoid leaving the skillet on the heat longer than needed, or the eggs may become dry.
Finish and serve. Fold in most of the olives and parsley. Taste and add salt only if needed. Take the pan off the heat and serve straight away, topped with the remaining parsley and olives, with lemon wedges alongside.

Tips

Plan for soaking. Traditional bacalhau is salted and dried, so desalting takes time but is mostly hands-off. Keep it refrigerated during the soak and change the water regularly. For a quicker meal, use clearly labeled desalted salt cod.
Use a practical substitute. If salt cod is unavailable, use fresh or frozen cod, thawed in the refrigerator. Poach it as directed, then season lightly; the result is less concentrated and salty than the traditional dish. Taste before adding salt.
Choose potatoes with texture. Portuguese recipes commonly use thin matchstick potatoes, often called batata palha. Packaged shoestring potatoes work well; add them near the end so they do not turn soggy. Regular thick fries make a heavier, less delicate dish.
Keep the heat low for the eggs. High heat can make them rubbery and may break the fish into mush. If the skillet is crowded, cook the onions and cod in a wide pan, then fold in the eggs in batches.

Serving Suggestions

Serve bacalhau à Brás hot as a main course, with a simple green salad dressed with olive oil and vinegar to balance its richness. Lemon wedges bring brightness, while crusty bread can catch any soft egg left on the plate. Since the dish already contains potatoes, additional starch is optional. For a Portuguese-inspired meal, pair it with lightly dressed greens or cooked seasonal vegetables.

Variations

For a more traditional, very crisp finish, use finely cut potatoes fried until golden; for convenience, use good-quality packaged shoestring potatoes. Some cooks add a small amount of grated carrot with the onion or use extra parsley, though neither is essential. You can also make the dish with another mild, flaky white fish, but it will not have the distinctive savory depth of salt cod. If using fresh fish, season cautiously and keep the same food-safety temperature.

Storage and Reheating

For food safety, refrigerate leftovers within 2 hours of cooking, in a covered shallow container. Keep them refrigerated at 40°F (4°C) or below and use within 3–4 days. The potatoes soften during storage, so the leftovers will be less crisp than when freshly made. Do not leave the dish at room temperature for longer than 2 hours, or 1 hour if the temperature is above 90°F (32°C).

Reheat a portion in a covered skillet over low heat with a teaspoon of water, stirring gently until steaming throughout and it reaches 165°F (74°C), the USDA FSIS safe temperature for leftovers. A microwave also works: cover loosely, heat in short intervals, and stir between them. Reheating will cook the eggs further. Freezing is not recommended because the egg texture can turn watery and grainy after thawing.

Frequently Asked Questions

Do I have to soak salt cod before making bacalhau à Brás?
Yes, unless the package specifically says it is desalted and ready to cook. Salt cod is preserved with a heavy coating of salt; soaking it in cold water in the refrigerator reduces that saltiness. Change the water every 6–8 hours and taste a cooked flake before proceeding.

Can I make bacalhau à Brás with fresh cod?
Yes. Fresh or thawed frozen cod is a convenient substitute, but it lacks the concentrated flavor and saltiness of cured bacalhau. Poach it until it reaches 145°F (63°C), then season the finished dish to taste rather than adding salt automatically.

What are batata palha?
Batata palha are very thin, crisp matchstick potatoes used in many versions of this dish. They may be fried at home or bought packaged as shoestring potatoes. If packaged potatoes are already salted, taste the cod and eggs before seasoning.

Can I prepare this dish ahead?
You can desalt the cod ahead and keep it covered in the refrigerator, and you can cook and flake it earlier on the day you plan to serve the dish. For the best texture, cook the onion, potatoes, and eggs just before serving; the eggs and potatoes both lose quality when held.

Why did my eggs turn dry or watery?
Dry eggs usually mean the heat was too high or they cooked too long. Watery eggs can result from very wet cod or from holding the finished dish; drain and pat the fish dry, and fold the eggs gently over low heat. Always meet the safe internal temperature of 160°F (71°C) for this egg dish.

Is bacalhau à Brás gluten-free?
The basic ingredients can be gluten-free, but check packaged shoestring potatoes and any seasoning for cross-contact or added wheat ingredients. If frying potatoes at home, use clean oil and equipment that have not been used for gluten-containing foods.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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