Salt cod fillets are one of the oldest preserved foods still in everyday use. Because the fish is packed in salt and dried, it can keep for months without refrigeration — but it cannot be cooked straight from the package. It first has to be soaked in water to remove excess salt and soften the flesh. Once that step is done, salt cod becomes a versatile ingredient that can be fried, baked, stewed, or turned into creamy spreads and fritters.
This guide walks through the whole process in order: what salt cod fillets are, how long and how to soak them, how to prepare them for cooking, and several classic recipes. It also covers common mistakes and storage questions so you can work with confidence the first time.
What Salt Cod Fillets Are
Salt cod is cod that has been split open, layered with salt, and air-dried until most of its moisture is gone. The result is a firm, leathery, intensely salty piece of fish. In some cuisines it is known as bacalao or morue, and it appears in many traditional dishes around the world.
Two forms are commonly sold:
- Bone-in salt cod — thicker pieces that usually need longer soaking and must be deboned before cooking.
- Boneless salt cod fillets — flatter, easier to handle, and often quicker to soak. These are the most convenient choice for home cooks.
Salt cod fillets are usually sold in plastic-wrapped packs or loose in a fish market. They may look stiff, pale, and slightly translucent. That is normal.
Why Soaking Is Necessary
Soaking does two things at once: it pulls salt out of the fish and puts water back in. Skipping or rushing this step leads to fish that is unpleasantly salty and tough. There is no way to fix over-salted salt cod after it is cooked — the salt must come out beforehand.
The good news is that soaking requires almost no effort. It is mostly waiting.
How to Soak Salt Cod Fillets
The standard method is slow and cold. Here is the process:
- Rinse the fillets. Run them under cold water to remove surface salt and any grit.
- Place in a large bowl or container. Use one big enough that the fish can sit in a single layer or two.
- Cover with cold water. The water should sit well above the fish.
- Refrigerate. Keep the bowl in the refrigerator the whole time. Cold water slows bacterial growth.
- Change the water regularly. Drain and replace with fresh cold water every 8 hours, or about three times a day.
- Soak for 24 to 48 hours. Thin boneless fillets are usually ready in 24 hours. Thick, bone-in pieces may need 48 hours or more.
- Taste to check. Cut off a small piece, rinse it, and taste it raw, or poach it briefly. It should taste seasoned, not aggressively salty.
If the fish still tastes too salty after 48 hours, keep soaking and changing the water. Very thick pieces can take up to three days.
A Faster Soak When You Are Short on Time
A quick method exists for when you have only a few hours. Soak the fillets in lukewarm water and change the water every 30 to 60 minutes. Most thin fillets will lose a good amount of salt within three to four hours. The trade-off is texture: the flesh softens more than it does with a cold soak and can become slightly mushy. Use the quick method for dishes where the fish is flaked or pureed, such as fritters or spreads, rather than for recipes where you want clean, firm pieces.
Some cooks add a splash of milk to the final soaking water to soften the fish’s aroma. This is optional and does not replace proper soaking.
Preparing Salt Cod for Cooking
Once the soaking is finished, a few preparation steps make the fish ready to use:
- Drain and rinse the fillets under cold running water.
- Pat dry with paper towels.
- Remove skin and any bones. Run your fingers over the surface to feel for pin bones, and pull them out with tweezers or pliers. Discard the skin if the recipe does not call for it.
- Cut into portions or flake the flesh, depending on the recipe.
- Taste a small piece before seasoning the rest of the dish. Salt cod keeps some saltiness, so you often need far less added salt than usual.
Poaching as a Final Step
Many recipes start by poaching the soaked fillets. Place them in a pan, cover with cold water or a mix of water and milk, and bring to a very gentle simmer. Cook for about 10 to 15 minutes, until the fish flakes easily. Do not let the water boil hard — rapid boiling makes the flesh tough and stringy. The poaching liquid can be strained and used to add flavor to soups and stews.
Classic Recipes Using Salt Cod Fillets
Salt Cod Fritters
Poach the soaked fillets until tender, then drain well and flake. Mix the fish with mashed potato, a little chopped onion, and beaten egg. Shape into small patties, coat lightly in flour or breadcrumbs, and fry in hot oil until golden on both sides. Fritters are a forgiving way to use fish that has softened during soaking.
Creamy Salt Cod Spread
Poach the fillets and flake them finely. Warm olive oil in a pan with sliced garlic, add the fish, and mash it into the oil. Stir in mashed potato or a little cream, plus a squeeze of lemon, until the mixture is smooth and spreadable. Serve warm or at room temperature with bread or crackers. This spread is sometimes known as brandade.
Salt Cod Stew with Potatoes and Tomatoes
Cut soaked, poached fillets into large chunks. In a pot, soften sliced onion and garlic in olive oil, add canned tomatoes, potatoes, and a pinch of paprika, then simmer until the potatoes are tender. Add the fish in the last few minutes so it stays in pieces. Adjust salt carefully at the end, since the fish contributes some.
Salt Cod Salad
Flake cooled poached fish and combine with sliced onion, chopped tomato, olives, and a simple olive oil and lemon dressing. Let it sit for 20 minutes before serving so the flavors blend.
Baked Salt Cod with Garlic and Olive Oil
Arrange soaked fillets in a baking dish, scatter with sliced garlic, drizzle generously with olive oil, and bake at around 190°C (375°F) for 15 to 20 minutes, until the fish flakes. Finish with chopped parsley and lemon.
Common Mistakes to Avoid
- Soaking at room temperature. Always refrigerate the soaking fish.
- Forgetting to change the water. Stale water slows desalting and can spoil the fish.
- Boiling hard during poaching. A gentle simmer keeps the flesh tender.
- Salting the dish early. Taste first, then season at the end.
- Judging by time alone. Thickness varies, so taste the fish to decide when it is ready.
Storing Salt Cod Before and After Soaking
Dry salt cod keeps for several months in a cool, dry place, or longer if wrapped and refrigerated. Once soaked, the fish is essentially fresh fish and should be refrigerated in a covered container and used within one to two days. Soaked fillets also freeze well: drain, pat dry, wrap tightly, and freeze for up to three months. Thaw in the refrigerator before cooking.
Frequently Asked Questions
Can salt cod be eaten without soaking? No. It is far too salty and too dry to eat as it comes. Soaking is required.
How long does soaking take? Plan on 24 to 48 hours for most fillets, with water changes every 8 hours.
Does soaking remove all the salt? It removes most of it, but a little remains. That residual saltiness is part of the ingredient’s character and is why you taste before seasoning.
Can I soak it in the refrigerator overnight only? You can, but thin fillets will still be quite salty. Continue soaking the next day for the best result.
The Bottom Line
Salt cod fillets are simple to work with once you know the sequence: soak in cold water, changing it regularly; rinse and remove skin and bones; poach gently or add straight to a recipe; and season at the end. From there, fritters, creamy spreads, stews, salads, and baked dishes are all within reach. With patience during soaking, salt cod turns into a tender, flavorful ingredient that works in a wide range of everyday meals.