Chasseur — hunter's sauce — evokes the forest and field in every spoonful, combining sautéed mushrooms, tomato concassée, white wine, shallots, and tarragon in a demi-glace base that is the quintessential sauce for sautéed chicken and rabbit. The mushrooms are the foundation: Paris button mushrooms (Agaricus bisporus) sliced 3mm thick and sautéed in clarified butter over high heat until deeply golden. They must be cooked in a single layer without crowding — steamed mushrooms are grey, limp, and flavourless. The mushrooms are removed and shallots are sweated in the same pan, followed by white wine reduced by half. Demi-glace is added with tomato concassée — ripe tomatoes peeled, seeded, and diced to 5mm. A splash of brandy, flambéed, adds warmth without rawness. The sauce simmers for 10 minutes, and the mushrooms are returned. Fresh tarragon, chopped at the last moment, is the aromatic signature — its anise note lifts the earthy mushroom and sweet tomato into something greater than its parts. The finished sauce should be thick enough to coat chicken pieces, with visible mushroom slices and tomato dice throughout. This is not a refined sauce — its beauty is in its rustic texture and direct, woodsy flavour. For the most aromatic result, use a mixture of wild and cultivated mushrooms: girolles and cèpes in season, supplemented with Paris mushrooms for body.
Sauté mushrooms in single layer over high heat — they must be golden, not steamed. Reduce white wine by half before adding demi-glace. Tomato concassée: peeled, seeded, 5mm dice. Fresh tarragon added at the very end to preserve its anise perfume. Rustic presentation — visible mushroom and tomato throughout.
For the deepest mushroom flavour, dry-sauté the mushrooms first (no fat, high heat) until they release and reabsorb their moisture, then add butter for colour — this two-stage technique produces the most intense result. A teaspoon of tomato paste sautéed with the shallots adds concentrated umami that supports the fresh tomato. If wild mushrooms are available, use 50% wild (girolles, cèpes, pieds de mouton) and 50% Paris — the wild mushrooms provide aroma while the cultivated provide body.
Crowding mushrooms in the pan — they steam instead of sautéing, producing grey, watery slices. Using canned tomato instead of fresh concassée — different texture and flavour entirely. Adding dried tarragon — it has a completely different flavour profile to fresh. Over-reducing until the sauce is thick and dark — chasseur should be saucy and loose, not dense.
Escoffier, Le Guide Culinaire; Larousse Gastronomique