Salt Cod à Brás: A Portuguese Cod and Potato Recipe

Salt cod à Brás, or bacalhau à Brás, is a Portuguese dish associated with Lisbon: flakes of salt cod are tossed with golden potato matchsticks, softened onion, and eggs. Olives and parsley add a briny, fresh finish, while the eggs bind the ingredients into a tender skillet meal. The balance of crisp potatoes and soft, savory fish makes it comforting without being heavy.

Ingredients

12 oz (340 g) dried salt cod, preferably in pieces no thicker than 1 inch (2.5 cm)
8 cups (1.9 L) cold water for each soak, or enough to cover the cod generously
1¼ lb (570 g) Yukon Gold or russet potatoes
4 cups (950 ml) neutral frying oil, such as canola or sunflower oil; you may not use all of it
2 tablespoons (30 ml) olive oil
1 large yellow onion, about 8 oz (225 g), thinly sliced
6 large eggs, about 10½ oz (300 g) without shells, lightly beaten
¼ teaspoon freshly ground black pepper, plus more to taste
½ cup (15 g) loosely packed chopped flat-leaf parsley
½ cup (75 g) pitted black olives, preferably Portuguese-style, halved

Instructions

Desalt the cod for 24 hours. Rinse the salt cod under cold running water to remove surface salt. Put it in a large nonreactive bowl, cover with 8 cups (1.9 L) cold water, cover the bowl, and refrigerate. Replace the water every 6 hours, using fresh cold water each time. After 24 hours, cut off a tiny piece and taste it. It should taste pleasantly seasoned rather than intensely salty. If it is still too salty, change the water and soak for another 4 hours, then taste again. The added time is most often needed for thicker pieces.
Prepare the potatoes and cod. Drain the cod and pat it dry. Peel the potatoes, then slice them into matchsticks about ⅛ inch (3 mm) thick; keeping them similar in size helps them cook evenly. Put the cut potatoes in a bowl of cold water while you finish preparing the other ingredients, then drain and dry them very thoroughly with a clean towel. Water on the potatoes can make hot oil splatter. Slice the onion, beat the eggs, and set out the parsley and olives.
Poach the cod. Put the drained cod in a saucepan and cover it with fresh cold water. Bring the water just to a gentle simmer over medium heat; avoid a hard boil, which can make the fish break apart. Simmer for about 5–8 minutes, depending on thickness, until the thickest part reaches the USDA FSIS safe minimum temperature for fish of 145°F (63°C), checked with a food thermometer. Lift the fish onto a plate, let it cool enough to handle, remove any skin and pin bones, and flake it into bite-size pieces. Discard the poaching water.
Fry the potatoes. Pour the neutral oil into a deep, heavy saucepan to a depth of about 1½ inches (4 cm), leaving plenty of room at the top. Heat it to 350°F (175°C), checking with a thermometer. Fry the dried potato matchsticks in several small batches for about 3–4 minutes per batch, stirring gently, until pale gold and tender with crisp edges. Do not crowd the pan or the oil temperature will drop and the potatoes will turn greasy. Transfer each batch to a paper-towel-lined tray and let the oil return to temperature between batches. Turn off the heat and set the oil aside to cool before discarding or saving it safely.
Soften the onion. Heat the olive oil in a large, wide skillet over medium-low heat. Add the sliced onion and cook for 8–10 minutes, stirring now and then, until soft and translucent but not deeply browned. If the edges start to color too quickly, lower the heat. Add the flaked cod and black pepper, and gently toss for 2 minutes so the fish warms and takes on the onion’s flavor without being mashed.
Combine the potatoes and eggs. Add the fried potatoes to the skillet and fold them through the cod and onion. Pour in the beaten eggs and stir slowly with a wide spatula over low heat, scraping the bottom and sides of the pan. Cook just until the eggs are set and moist, usually 2–4 minutes. Because this is an egg dish, check that the mixture reaches the USDA FSIS safe minimum internal temperature of 160°F (71°C) with a food thermometer. Keep the heat gentle and stir continuously to prevent dry curds; the finished mixture should hold together while remaining tender.
Finish and serve. Take the skillet off the heat as soon as the eggs reach temperature. Fold in most of the parsley and olives, taste, and add more black pepper if needed. Salt cod can leave enough seasoning in the dish that extra salt is unnecessary. Scatter the remaining parsley and olives over the top and serve immediately while the potatoes still have some crispness.

Tips

Desalt patiently and taste before cooking. Salt cod varies in thickness and salt level, so a fixed soak time is only a starting point. Keep it refrigerated during soaking, change the water regularly, and taste a small piece before proceeding. If it is still sharply salty, another few hours in fresh water is more useful than trying to compensate with extra potatoes or eggs later.
Dry the potatoes thoroughly. Drain them well and press them between clean towels before frying. Damp matchsticks can splatter and will steam rather than crisp. If you do not want to fry, use about 5 cups (150 g) of ready-made shoestring potatoes; fold them in near the end, and expect a crunchier, saltier result.
Use a broad skillet and low heat for the eggs. A large pan gives the cod and potatoes room to mix without crushing them. High heat sets the eggs too quickly and can make them watery or rubbery. Stir steadily and remove the pan from the burner as soon as the mixture reaches 160°F (71°C).
Adjust seasoning at the end. Olives and cod both contribute salt, and the amount left after soaking differs. Use black pepper freely, but taste before adding salt. If you cannot find Portuguese black olives, ordinary pitted black olives work; they give a milder, less briny flavor.

Serving Suggestions

Serve salt cod à Brás hot as a main course, straight from the skillet or spooned onto warm plates. A simple green salad dressed with olive oil and vinegar or lemon provides a crisp, acidic contrast to the soft eggs and savory fish. Sliced tomato, lightly dressed greens, or steamed green beans also work without competing with the cod.

Because the dish already contains potatoes and eggs, it usually needs little alongside it. If you want bread, offer a small basket of crusty bread to catch the flavorful bits left on the plate. A few extra olives and a little parsley make an easy garnish; avoid adding more salt before tasting. For a larger meal, serve a modest portion first and bring a fresh salad to the table so the fried potatoes do not sit covered and steam.

Variations

There are family and restaurant variations of bacalhau à Brás, so the proportions of fish, potato, and egg are not fixed. For a more potato-forward skillet, increase the potatoes to 1½ lb (680 g) and use 7 eggs. For a more pronounced cod flavor, keep the listed potatoes and use up to 14 oz (400 g) of desalted cod, making sure it still fits comfortably in the pan.

Fresh cod can stand in for salt cod if dried salt cod is unavailable, but the dish will lose its characteristic concentrated, savory flavor. Use 12 oz (340 g) fresh cod, season it lightly, and cook it until it reaches 145°F (63°C); salt the finished mixture cautiously. Frozen, thawed cod works too if it is patted very dry. For a less labor-intensive version, use good-quality ready-made shoestring potatoes instead of frying fresh potatoes; add them just before the eggs so they do not soften too much.

Some cooks include a small minced garlic clove with the onion, while others leave it out. A pinch of smoked paprika is another optional variation, though it changes the flavor from the restrained, onion-and-cod profile of this recipe. If using green olives instead of black, expect a sharper, more assertive briny taste. Keep the parsley, since its freshness helps balance the richness regardless of which variation you choose.

Storage and Reheating

For food safety, refrigerate leftovers within 2 hours of cooking in a shallow, covered container. They keep for 3–4 days in the refrigerator. The potatoes will soften as they sit, and the egg mixture will become firmer, so leftovers will not have quite the same texture as a freshly made skillet. Freezing is possible for up to 2 months, but it tends to make the eggs grainy and the potatoes softer; refrigeration is preferable for the best quality.

Reheat only the portion you plan to eat, either in a covered skillet over low heat with a teaspoon of water or in the microwave in short intervals, stirring between intervals. Heat leftovers to 165°F (74°C), as recommended for reheated leftovers, checking the center with a food thermometer. Avoid repeated cooling and reheating. If the mixture smells off, has been left at room temperature for more than 2 hours, or its storage history is uncertain, discard it rather than tasting it.

Frequently Asked Questions

How long should I soak salt cod?
For the pieces in this recipe, plan on 24 hours in the refrigerator, changing the water every 6 hours. Thick pieces or especially salty cod may need longer. Taste a small flake after soaking; if it is still unpleasantly salty, continue soaking in fresh water and taste again before cooking.

Can I use already-desalted salt cod?
Yes. Check the package directions and taste a small piece before you begin; some products still need a brief rinse or soak. If it is ready to cook, skip the 24-hour soak and start with the preparation step. The recipe’s total time will then be about 1 hour and 10 minutes, including the listed prep and cooking time.

Why are my potatoes soggy?
Common causes are wet potato matchsticks, overcrowding the frying pan, or oil that is not hot enough. Dry the potatoes well, fry small batches at about 350°F (175°C), and let the oil recover its temperature between batches. A pan of potatoes left waiting under a lid will also soften from trapped steam.

Can I make salt cod à Brás ahead?
You can desalt and poach the cod, then refrigerate it in a covered container for up to 2 days before assembling the dish. You can also cut the potatoes shortly before cooking, keeping them submerged in cold water in the refrigerator, then draining and drying them thoroughly. For the best texture, fry the potatoes and cook the eggs just before serving rather than making the complete skillet in advance.

Is bacalhau à Brás the same as other Portuguese salt cod dishes?
No. It is one preparation among many, distinguished by flaked cod combined with thin potatoes, onion, and eggs. Other Portuguese bacalhau dishes use different combinations and cooking methods, and households vary the proportions and garnishes. The olives and parsley in this version provide a familiar finishing touch, but the exact balance is flexible.

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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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