Écrevisses à la Bordelaise — Crayfish in Mirepoix and White Wine

Ingredients

• 24 live crayfish, châtrés — intestinal vein removed before cooking
• 50 g unsalted butter, for sautéing, brought to a foam over high heat
• For the mirepoix
• 80 g fine mirepoix, onion, carrot, and celery cut in brunoise
• 40 ml Cognac, for flambéeing
• 200 ml dry white Bordeaux
• 100 ml fish fumet
• 2 tbsp tomato concassée, peeled, seeded, and roughly chopped
• 1 bouquet garni
• 1 pinch cayenne
• For the finish
• 40 g unsalted butter, cold, cut into cubes
• 10 g fresh tarragon, finely chopped
• 10 g fresh flat-leaf parsley, finely chopped

Method

1. 1
   Working with one crayfish at a time, grasp the body firmly, locate the central tail fin (the telson), twist and pull gently — the intestinal vein slides out cleanly. Discard any crayfish that do not move; only live, vigorous specimens are safe to cook. The kitchen will be ready when all 24 crayfish are châtrés and held on a tray.
2. 2
   Melt 50 g butter in a wide, heavy sauté pan over high heat until it foams. Add the crayfish in a single layer and toss constantly for 3–4 minutes. The dish lives or dies here: the shells must turn fully scarlet — pale or blotchy colouring means the heat was insufficient to release the astaxanthin pigment and develop the Maillard flavour on the shell proteins; a uniform, vivid red signals that full flavour extraction has occurred.
3. 3
   Add the 80 g fine mirepoix and cook for 2 minutes, tossing to coat the vegetables in the butter and shell juices. The brunoise should soften slightly and take on colour at the edges without browning deeply.
4. 4
   Pour the 40 ml Cognac into the pan and flambée immediately — tilt the pan or apply a flame to the surface. Allow the alcohol to burn off completely; the flames subside when combustion is exhausted, leaving behind caramelised depth that cannot be replicated by simple reduction.
5. 5
   Add the white Bordeaux, fish fumet, tomato concassée, bouquet garni, and cayenne. Cover and braise over a moderate heat for 8–10 minutes. The crayfish are done when the tail meat is just firm and opaque throughout; beyond 10 minutes it will toughen and dry irreparably.
6. 6
   Lift the crayfish from the pan and set aside in a warm deep dish. Remove the bouquet garni. Reduce the braising liquid by half over high heat, then pass through a fine sieve. The reduced sauce should coat a spoon lightly and smell cleanly of wine and crustacean.
7. 7
   Remove the pan from the heat. Whisk in the 40 g cold butter cube by cube to form a glossy emulsion. Stir in the chopped tarragon and parsley. The finished sauce should be smooth, cohesive, and coat the back of a spoon with an even sheen; if it appears greasy or broken, the butter was added over too high a heat.
8. 8
   Pour the sauce over the crayfish piled in the deep dish and serve immediately. The dish is eaten with the hands.