Brandade de Morue Gratinée (Salt Cod and Potato Gratin)

In French cooking, brandade de morue turns preserved salt cod into a creamy, savoury gratin, softened by potato and enriched with olive oil, garlic and cream. The cod is first soaked to tame its salinity, then gently poached and beaten with tender potato until smooth and spoonable. A breadcrumb topping gives the finished bake a crisp golden surface, while lemon added at the end keeps the richness in check. Served hot with a sharp green salad, it works as a comforting dinner or a generous sharing dish with a distinctly briny, garlicky character.
Cuisine style French comfort food
Cooking style Make-ahead friendly • Crowd-friendly
Time commitment Make-ahead friendly

Why this recipe works

  • Silky filling: Beating warm garlic oil and hot cream into tender potato and flaked cod creates a smooth, spoonable brandade.
  • Crisp contrast: Breadcrumbs brown in the oven, giving the gratin a savoury crust against the soft, creamy base.
  • Richness kept in check: A squeeze of lemon brightens the salt cod, garlic and cream so the finished dish tastes rounded rather than heavy.

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Timing notes

  • Allow time to soak the cod: Salt cod needs a long soak with water changes before cooking; rushing this step can leave the finished brandade too salty.
  • Rest before serving: Let the gratin stand briefly after baking so the filling settles and is easier to spoon.

Ingredient notes

  • Season at the end: Salt cod varies widely, so taste after poaching and add fine sea salt only if the mixture genuinely needs it.
  • Steam-dry the potatoes: Draining the potatoes well keeps the brandade creamy rather than loose or watery.

Texture tips

  • Beat while warm: Warm potatoes, cod, oil and cream combine more smoothly, helping the mixture become lighter and silkier.
  • Keep the topping crisp: Add the breadcrumbs just before baking so they stay dry enough to brown properly.

Make-ahead tips

  • Assemble ahead: The brandade can be prepared and chilled before baking; add the breadcrumb topping just before it goes into the oven.
  • Reheat gently: Reheat leftovers in a 180°C (355°F) oven until piping hot, then finish with lemon to refresh the flavour.

Equipment you'll need

Ingredients
Instructions
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  1. Rinse the salted cod, then cover with cold water in a large pot and leave to soak for 8 hours, changing the water 2 to 3 times. This reduces the salt so the brandade tastes balanced rather than briny.
  2. Drain the cod, return it to the pot and cover with fresh cold water; add the bay leaves. Bring just to a gentle simmer and cook for 8 to 10 minutes until the fish flakes easily, then lift out and cool slightly.
  3. While the cod cooks, peel the potatoes and cut into even chunks. Boil in salted water for 15 to 18 minutes until very tender, then drain well and let them steam-dry in the colander for 2 minutes.
  4. Heat the oven to 200°C (390°F). Peel and finely grate the garlic, then warm the olive oil with the garlic in a small saucepan over low heat for 1 to 2 minutes until fragrant, without letting it colour.
  5. Flake the cod, discarding any skin or bones, and place in a mixing bowl. Add the potatoes and mash until mostly smooth, then beat vigorously with a wooden spoon while slowly drizzling in the warm garlic oil until the mixture looks lighter and silky.
  6. Warm the double cream until hot but not boiling, then beat it into the brandade a little at a time until creamy and spoonable. Season with black pepper and add fine sea salt only if it needs it, then squeeze in a little lemon juice to brighten the flavour.
  7. Spoon the brandade into a baking dish and smooth the top. Sprinkle evenly with the breadcrumbs and bake for 18 to 22 minutes until bubbling at the edges and golden on top; rest for 5 minutes before serving with extra lemon wedges.

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Recipe notes

Serving suggestions

This recipe pairs well with:

A simple green salad

Tips

  • If you are unsure how salty the cod is, taste a small flake after poaching and adjust the lemon and fine sea salt at the end rather than early on.
  • For the silkiest texture, make sure the potatoes are very tender and well drained before mashing so the brandade does not turn watery.
  • If serving anyone who is vulnerable, ensure the cod is cooked until it flakes easily and the centre of the bake is piping hot.

Substitutions

  • Replace double cream with crème fraîche for a slightly tangier, lighter finish; stir it in off the heat so it does not split.
  • Replace breadcrumbs with panko breadcrumbs for a crunchier topping.

Storage

  • Refrigerate up to 2 days
  • Cool, cover and refrigerate. Reheat in a 180°C (355°F) oven for 15 to 20 minutes until piping hot; add a squeeze of lemon just before serving.

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Brandade de Morue Gratinée (Salt Cod and Potato Gratin)
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Recipe overview

  • Servings: 4 servings
  • Total time: 1h 50min (35min active)
  • Difficulty: Medium
  • Cuisine: French
  • Allergens:
    Fish Gluten Milk Wheat
With serving suggestions

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