Sauce Béchamel

The sauce is traditionally tied to the court of Louis XIV and named after Louis de Béchameil, a 17th-century financier and steward of the royal household, though the attribution is honorific rather than culinary — he is unlikely to have invented it, and a cook may simply have dedicated an existing preparation to him. The earliest printed version appears in François Pierre de la Varenne's Le Cuisinier françois (1651). Marie-Antoine Carême placed it among the foundational sauces of grande cuisine in the early 19th century, and Auguste Escoffier later fixed it as one of the five mother sauces in Le Guide culinaire (1903).

Pure, clean and velvety, it coats the spoon in a pale ivory sheet with no graininess and no raw-flour taste. The flavour is gently milky and rounded, the nutmeg barely there — more warmth than spice. Done right it pours in a smooth ribbon; done wrong it is either pasty and floury or thin and lumpy.

Flour cooked in butter forms a roux in which the fat coats each starch granule; when milk is whisked in and heated, the starch granules swell and gelatinise, trapping water and thickening the liquid without clumping. Cooking the roux briefly before adding milk drives off the raw-flour taste while keeping it pale, and adding the milk gradually off a fierce boil keeps the starch dispersed so the sauce stays glossy and smooth rather than lumpy.