Biscotti is the Italian plural of biscotto, itself from Medieval Latin biscoctum — a transparent compound of bis ("twice") and coctus, the past participle of coquere ("to cook"). The word means, with absolute literalness, "twice-cooked." This double baking was not a culinary affectation but a preservation technique: removing moisture through a second baking made bread resistant to mold and spoilage, extending its shelf life from days to months. The technique was essential for provisioning armies, naval expeditions, and long overland journeys.
The etymological family is pan-European and remarkably consistent. English "biscuit" comes from Old French bescuit, from the same Medieval Latin biscoctum. German Zwieback means "twice-baked" (zwie = twice, back = baked). Spanish bizcocho and Portuguese biscoito preserve the Latin compound. Each language independently translated or borrowed the concept, testifying to the universal importance of long-lasting bread
Roman soldiers carried bucellatum, a hard twice-baked bread, as field rations. Medieval Crusaders provisioned themselves with similar hardtack for the journey to the Holy Land. The British Royal Navy issued ship's biscuit — so hard it had to be broken with a fist or soaked in liquid — as a staple ration through the 19th century. The Italian tradition of biscotti maintained
The biscotti most familiar to English speakers are biscotti di Prato, also called cantucci — oblong, almond-studded cookies from the Tuscan city of Prato. The traditional serving involves dunking them in Vin Santo, a sweet Tuscan dessert wine. Antonio Mattei's bakery in Prato, established in 1858, is credited with popularizing the modern form, though twice-baked almond cookies existed in Tuscany long before.
Biscotti entered American English vocabulary primarily through the specialty coffee boom of the 1980s and 1990s. Starbucks and similar chains introduced biscotti as a coffee accompaniment, and the word became familiar to millions of Americans who might never have encountered it otherwise. The irony is that in Italy, biscotti is a generic term for any cookie or biscuit — not specifically the hard, twice-baked variety that Americans associate with the word. What Americans call "biscotti" Italians would specify as biscotti secchi ("