Bacalhau com Natas (Portuguese Salt Cod Cream Gratin)
Quick answer
Bacalhau com natas - salt cod with cream - is a Portuguese casserole-style gratin that layers desalted cod, potatoes, and softened onion beneath a thick blanket of cream-...
What makes this special
- Bacalhau com Natas layers desalted cod and potatoes under a thick, bubbling cream gratin.
- Layers of desalted cod, half-cooked potatoes, and caramelized onion stacked
- Heavy cream bechamel reduces in oven; potato edges crisp and curl
Key ingredients
Core cooking flow
- 1 Submerge 400g salt cod in 2 liters of cold water the night before, changing...
- 2 Slice 450g potatoes into 0.5cm rounds, then par-cook them in 175C oil for 2-...
- 3 Heat 2 tablespoons olive oil over low heat and stir 180g onion for 10 minute...
Bacalhau com natas - salt cod with cream - is a Portuguese casserole-style gratin that layers desalted cod, potatoes, and softened onion beneath a thick blanket of cream-enriched bechamel, then bakes until the surface blisters and turns golden brown. The cod requires prolonged soaking, typically forty-eight hours or more with several water changes, to draw out enough salt while preserving the firm, flaky texture of the fish. It is then briefly poached and separated into large pieces that retain structure in the baking dish rather than dissolving into the sauce. Thinly sliced potatoes, parboiled until just softened, alternate with the fish in even layers, and sweet, slowly cooked onion fills the gaps between them. A bechamel made with heavy cream - natas in Portuguese - is poured over everything, seeping into the crevices before baking begins. As the dish heats, the cream sauce tightens, potato edges that protrude through the surface curl and crisp, and the top develops scattered patches of deep gold where the milk proteins have caramelized. The result is simultaneously rich and precise: the cod residual mineral salinity cuts through the cream smoothness and prevents the dish from becoming cloying. Bacalhau com natas is a fixture of the Portuguese Christmas Eve meal known as consoada, appearing alongside other salt cod preparations at a table where bacalhau takes on a near-ritual significance.
Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Season
Submerge 400g salt cod in 2 liters of cold water the night before, changing the water 2-3 times at 8-12 hour intervals until the soaking liquid no longer tastes salty.
- 2Heat
Slice 450g potatoes into 0.5cm rounds, then par-cook them in 175C oil for 2-3 minutes or pan-fry 2 minutes per side until they are half-cooked but still hold their shape for layering.
- 3Control
Heat 2 tablespoons olive oil over low heat and stir 180g onion for 10 minutes until translucent and lightly golden, then add 3 sliced garlic cloves and cook 1 minute more to bloom the aroma.
- 4Control
Drain the soaked cod and tear it by hand into large flakes along the grain, add to the pan with 150ml milk and 1 bay leaf, then simmer gently on medium heat for 5 minutes without stirring to let the fish absorb the liquid.
- 5Season
Discard the bay leaf, fold the par-cooked potatoes and 250ml heavy cream into the pan mixture until evenly combined, transfer to an oven-safe baking dish, and season evenly with 0.5 teaspoon pepper.
- 6Heat
Bake in a 200C oven for 20-25 minutes until the surface bubbles and the potato edges along the rim turn a deep golden brown, then rest for 5 minutes before serving so the layers settle.
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