Beurre Manié — Kneaded Butter and Flour Thickener

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Beurre manié is the emergency thickener of the French kitchen — equal parts soft butter and flour kneaded together into a smooth paste that can be whisked into any hot liquid to thicken it instantly without forming lumps. Unlike a roux, which must be cooked before liquid is added, beurre manié is added to an already-simmering liquid, making it invaluable for last-minute corrections when a sauce, stew, or braise is too thin. The butter melts on contact with the hot liquid, dispersing the flour particles evenly before they can clump together — the fat coats each flour granule, preventing the protein-starch matrix from forming lumps. The technique: knead 50g soft butter with 50g plain flour on a plate using a fork or your fingers until completely homogeneous. Pinch off walnut-sized pieces and whisk them one at a time into the simmering liquid, allowing 30 seconds between additions for each piece to thicken before assessing whether more is needed. The sauce must simmer for at least 5 minutes after the final addition to cook out the raw flour taste — this is the critical step that separates professional use from amateur. Beurre manié is used in blanquette de veau, matelotes, coq au vin, and any braise where the cooking liquid requires thickening at the end. It should never be the primary thickening method for a refined sauce — that role belongs to reduction, roux, or liaison — but as a corrective tool, it is indispensable.

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