flour mixed with 1 tablespoon cold water

A flour and water mixture, commonly referred to as a slurry or beurre manié (when combined with cold butter), is a basic culinary preparation used primarily as a thickening agent in sauces, gravies, and stews. The ratio of flour to liquid—in this case, one tablespoon of cold water per unit of flour—creates a paste-like consistency that readily disperses into hot liquids without forming lumps. The cold water prevents the flour from immediately gelatinizing, allowing it to remain suspended and distribute evenly when whisked into heated liquids.

The flour particles swell and release starch as they encounter heat, causing the surrounding liquid to thicken through starch gelatinization. This technique is foundational to classical French cuisine and appears across many culinary traditions as a reliable method for achieving desired sauce consistency.

This flour-water mixture is primarily employed as a finishing thickener for sauces, gravies, and braises. When whisked into simmering liquids, it rapidly thickens without creating the dense texture that results from a roux (a flour-fat mixture). It is particularly useful for quick pan sauces, when a roux has not been prepared in advance, or when additional fat is undesirable. Common applications include thickening pan drippings for gravy, finishing cream sauces, and stabilizing braising liquids. The technique appears in soups, stews, and preparations requiring immediate thickening without the extended cooking time a traditional roux demands.