Jus Lié — Lightly Thickened Meat Jus

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Jus lié occupies the precise middle ground between unthickened jus and a full demi-glace. It is meat jus given the faintest body with arrowroot or cornstarch — enough to lightly coat the back of a spoon but never enough to approach sauce consistency. The modern French kitchen relies on jus lié more than any other sauce format because it delivers concentration without heaviness, sheen without opacity, and meat flavour without flour. The technique begins with a strong, well-reduced brown stock or roasting jus. In a separate vessel, dissolve arrowroot in cold water at a ratio of roughly 10g per litre of jus. Whisk the slurry into the simmering jus, which thickens almost immediately. The sauce is passed through a fine chinois and adjusted: a small knob of cold butter swirled in off-heat adds a final sheen without making the sauce feel enriched. Arrowroot is preferred over cornstarch in classical French service because it produces a clearer, more brilliant finish and does not break down under prolonged heat as readily. However, arrowroot-thickened jus cannot be held on a bain-marie for extended periods — it will thin. For à la minute service, this is irrelevant. For banquet service, cornstarch is the pragmatic choice. The finished jus lié should look like liquid silk — dark, translucent, with a barely perceptible body. If it coats the plate like a sauce, it is too thick.

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