Worcestershireor Worcester sauceis afermentedliquidcondimentcreated in the city ofWorcesterinWorcestershire, Englandduring the first half of the 19th century. The creators were the chemists John Wheeley LeaandWilliam Henry Perrins, who went on to form the companyLea & Perrins. Worcestershire sauce has been considered ageneric termsince 1876 when the EnglishHigh Court of Justiceruled that Lea & Perrins did not own the trademark to "Worcestershire".

Worcestershire sauce is frequently used to enhance food and drink recipes, includingWelsh rarebit,Caesar salad,Oysters Kirkpatrick, anddeviled eggs. As both a background flavor and a source ofumami(the savory fifth flavor), it is now also added to dishes that historically did not contain it, such aschili con carneandbeef stew. It is also used directly as a condiment on steaks, hamburgers, and other finished dishes, and to flavorcocktailssuch as theBloody MaryandCaesar