Cod preserved in salt until it's stiff as board and keeps for a year without refrigeration — the fish that provisioned the Atlantic trade. It needs one to three days of soaking with the water changed regularly, and that step is not negotiable.
Cod split, salted heavily and dried until it loses most of its water, coming out pale, rigid and intensely salty. Sold as whole flat sides, as thick loin pieces, or as skinless boneless fillets. The thickest loin sections rehydrate to the best texture and cost the most. Related products across the Caribbean and Africa use pollock, hake or ling under the same name and behave similarly but rehydrate faster. Some is sold partially desalted and refrigerated, which shortens the soak but doesn't eliminate it.
Preservation is water activity again, achieved by heavy salting followed by drying, which together take moisture low enough that bacteria and moulds can't grow. Rehydration reverses the process by diffusion — the fish sits in fresh water and salt migrates out down the concentration gradient until it equalises — which is why the water has to be changed repeatedly. Leaving it in the same water means the gradient flattens and desalting stops. The salt also alters the protein structure permanently, giving rehydrated salt cod a firmer, more layered texture than fresh cod, which is why the two aren't interchangeable even after soaking.
The essential first step for every preparation, and the length depends on thickness.
HowRinse the surface salt off, then submerge in cold water in the fridge for twenty-four to seventy-two hours, changing the water every six to eight hours. Thick loins want the full three days. Taste a corner before cooking — it should be pleasantly seasoned, not salty.
The classic Provençal and Portuguese use — poached, then emulsified with olive oil, milk and garlic into a whipped spread.
HowPoach the soaked fish gently ten minutes, flake, then beat with warm olive oil and warm milk alternately until it emulsifies. Garlic and lemon. Serve warm with bread.
Flaked salt cod holds its texture in mixed dishes far better than fresh cod, which disintegrates.
HowFlaked into potato, onion and egg for à brás, or bound with potato and fried as fritters or acras. The firmness of the rehydrated fish is what makes these work.
The Jamaican national dish and the dominant use across the region, where saltfish is sautéed with aromatics rather than poached.
HowSoaked, then boiled briefly and flaked, sautéed with onion, scotch bonnet, thyme and tomato, then folded through ackee at the end.
Salt cod is preserved with enough salt to keep for a year at room temperature, which means it is genuinely inedible until properly rehydrated — not strongly seasoned, but harsh, and no amount of dilution in a finished dish rescues it. Thick loin pieces need a full three days. The related error defeats the whole process: soaking in one unchanged bowl of water lets the salt concentration in the water rise until it equalises with the fish, at which point diffusion stops and nothing further comes out. The water has to be poured off and replaced every six to eight hours, and the fish kept refrigerated while it soaks. Taste a small corner before cooking; that's the only reliable test, and it takes ten seconds.
Thick loin cuts rehydrate to the best texture and are worth the premium over thin tail pieces, which can go stringy. It should be pale creamy white rather than yellow — yellowing indicates oxidation and age. Whole dried sides are cheapest and need cutting with a saw or heavy knife. Portuguese, Spanish, Italian and Caribbean groceries carry it reliably. Partially desalted refrigerated fillets are convenient and still need a shorter soak. Unopened dried salt cod keeps essentially indefinitely in a cool dry place, which was the entire point.
Doneness: Soak twenty-four to seventy-two hours in the fridge, changing water every six to eight hours. Once soaked, poach gently at a bare simmer for eight to ten minutes — it's already firm and hard boiling makes it tough. Not a temperature-probe ingredient.
Depends entirely on thickness. Thin fillets may be ready in twelve to twenty-four hours; thick loin pieces need forty-eight to seventy-two. Change the water every six to eight hours throughout, keep it refrigerated, and taste a small piece before cooking. Time guidance is a starting point — the taste test is the actual answer.
Not really, though recipes sometimes suggest it. Salting and drying permanently changes the protein structure, giving rehydrated salt cod a firm, layered texture that holds together in fritters, stews and brandade where fresh cod falls apart into mush. The flavour is also more concentrated. If you substitute fresh cod, expect a different and generally looser dish.
It indicates oxidation and age. Good salt cod is pale creamy white; pronounced yellowing means the fats have oxidised, which brings a rancid edge that soaking won't remove. A slight ivory tone is fine. Avoid anything with deep yellow or brown patches, or any sour smell beyond the normal salty fish odour.