Duxelles — Concentrated Mushroom Mince

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Duxelles is not a sauce but a foundational preparation — a concentrated, dry mushroom mince that forms the flavour base for sauce duxelles, stuffings, farces, and gratins across the classical repertoire. Its creation is attributed to La Varenne's patron, the Marquis d'Uxelles. The technique is precise: Paris mushrooms (or a mix including cremini and wild varieties) are cleaned, trimmed, and chopped to a fine mince — ideally 2mm pieces, achieved by hand or in brief pulses of a food processor. The mince is then squeezed dry in a clean cloth, wringing out every drop of moisture. This step is essential: mushrooms are 90% water, and the goal is concentrated flavour, not wet pulp. The wrung-out mince is cooked in butter with finely diced shallots over medium-high heat, stirring constantly, until every trace of moisture has evaporated and the mixture begins to sizzle in its own butter — this is the moment of concentration, when the mushroom flavour intensifies from mild to deeply savoury. The finished duxelles should be almost dry, darkened from Maillard browning, and intensely aromatic. It keeps refrigerated for a week or frozen for months. A tablespoon of duxelles stirred into a cream sauce transforms it. A layer spread under a beef Wellington's pastry provides the moisture barrier that keeps the crust crisp. In sauce duxelles (duxelles simmered with white wine, shallot, and demi-glace), it becomes a sauce in its own right.

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