Blanquette de la mer is the seafood adaptation of the classical blanquette de veau — mixed fish and shellfish poached in white stock and served in a cream-enriched velouté finished with egg yolk liaison. The defining characteristic is whiteness: no browning of the fish, no tomato, no dark wine — the entire dish is deliberately kept pale, showcasing the purity of the ingredients. The fish selection must balance texture and flavour: firm white fish (200g monkfish, 200g turbot), shellfish (8 scallops, 12 mussels, 8 langoustine tails), and optionally 200g salmon for colour contrast. Prepare a fish fumet base (1 litre) with white wine, shallots, and mushroom trimmings. The firm fish goes in first, poached gently at 80°C for 5 minutes; scallops and langoustine tails are added for the final 3 minutes; mussels are opened separately à la marinière and their strained liquor added to the fumet. While the fish poaches, prepare turned mushrooms (24 caps, cooked à blanc in lemon water and butter) and pearl onions (glazed à blanc in butter, water, and sugar without colour). The sauce: reduce 500ml of the poaching liquid by half. Add 200ml fish velouté, 100ml double cream, and reduce to nappant consistency. Off the heat, incorporate a liaison of 2 egg yolks beaten with 50ml cream — stir gently without boiling. Add a squeeze of lemon, the mushrooms, and onions. The fish is arranged in a deep platter, the mussels in their shells around the edge, and the sauce ladled over. Scatter with chervil pluches. The dish is all silk and light — the antithesis of the robust Mediterranean fish stew.
No colour at any stage — the dish must remain white throughout Stagger the fish addition: firm fish first, delicate shellfish last Mussels opened separately — their liquor enriches the fumet, but they must not overcook in it Egg yolk liaison off the heat only — boiling curdles it instantly Turned mushrooms and glazed pearl onions are the canonical garniture — they mirror blanquette de veau
A tablespoon of Noilly Prat (dry vermouth) added to the fumet before reducing gives a subtle herbal depth that elevates the entire dish Keep the salmon pieces slightly larger than the white fish — when sliced through the sauce, the coral-and-white contrast is visually striking For absolute refinement, pass the final sauce through a fine chinois before adding the liaison — it removes any impurities and produces a sauce of liquid-silk perfection
Browning any ingredient — this is a blanquette; even slight colour on the fish disqualifies it Poaching all fish for the same duration — scallops need 2-3 minutes, monkfish needs 6-8 Boiling after the egg liaison — the sauce becomes grainy and curdled Omitting the lemon juice — without it, the cream-rich sauce is flat and cloying Using oily fish (mackerel, sardine) that overpowers the delicate velouté — stick to white, firm-fleshed varieties
Escoffier, Le Guide Culinaire; Larousse Gastronomique