Cultural Context
Desalting cod is a basic and decisive gesture in Portuguese cuisine. It is the silent moment that precedes lagareiro, Brás, and cozido — and defines whether the dish will shine or disappoint.
The idea is not to erase the fish's personality, but to balance salt, texture, and moisture so that it cooks tender, flavorful, and never aggressive on the palate.
Why Desalt
Cod is preserved in salt, which ensures its curing and long shelf life. Without the correct soaking, the piece becomes inedible and disrupts any recipe. Desalting restores texture, hydrates the fibers, and prepares the fish to absorb the seasonings.
Before You Start
Choose a clean, deep container, made of glass or stainless steel, with enough space to fully submerge the pieces in cold water.
Wash the cod under running water to remove the surface salt before submerging. Reserve space in the refrigerator: the soaking always happens refrigerated.
Position the fillets skin-side up. This helps the salt settle to the bottom of the container between water changes.
Step by Step
- Wash the surface salt
Rinse the cod under cold running water to remove excess salt from the surface.
- Submerge in cold water
Place in a clean container, cover completely with cold water, and refrigerate.
- Change the water
Renew the water every 6 to 8 hours, always cold, draining the settled salt at the bottom.
- Taste a flake
After the initial period, taste a small flake from the center of the fillet to assess the salt.
- Drain and dry
Drain well, dry with kitchen paper, and use according to the chosen recipe.
Soaking Time by Cut Type
| Cut | Approximate Time | Water Changes |
|---|---|---|
| Thick fillets (loin) | 36 to 48 hours | Every 6 to 8 hours |
| Medium fillets | 24 to 36 hours | Every 8 hours |
| Flakes and trimmings | 12 to 24 hours | Every 8 hours |
The times are a reference: thickness, salinity, and refrigerator temperature influence the result. Always trust the taste of a flake.
Water Change
The regular change is the heart of desalting. With each renewal, the salt that has come out of the fibers is discarded with the water, allowing the fish to continue releasing the excess.
Always use cold water. Warm water accelerates the process inappropriately, harms the texture, and increases the risk of spoilage.
Common Mistakes
- Desalting outside the refrigerator, at room temperature.
- Using warm water to speed up the process.
- Not changing the water with the appropriate frequency.
- Forgetting that potatoes, eggs, and cream also balance the salt in the dish.
How to Know if It's Ready
Taste a flake taken from the center of the fillet — the thickest part is the last to desalt. It should be flavorful and slightly salty, never aggressive. If it is still strong, extend the soaking with another water change.
Frequently Asked Questions
Can I desalt cod at room temperature?
It is not recommended. The refrigerator reduces the risk of spoilage and maintains the texture of the fish.
How many times should I change the water?
Generally, every 6 to 8 hours, adjusting according to thickness and salinity.
How do I know if it's ready?
Taste a flake from the center of the fillet. It should be flavorful but not overly salty.
This guide is part of the editorial curation of Empório Portugal, created to help readers better understand Portuguese cuisine, its ingredients, techniques, and traditions. Culinary practices may vary by region, family, and cook.
Perfectly salted cod calls for a good recipe.
With the fish desalted, it's time to choose the dish that will be served.