Bresaola is air-dried, salted beef (but it can also be made of horse, venison, and pork) that has been aged two or three months until it becomes hard and turns a dark red, almost purple colour. It is made from top (inside) round, and it is lean and tender, with a sweet, musty smell. It originated in Valtellina, a valley in the Alps of northern Italy's Lombardy region.

The word comes from the diminutive of Lombard bresada ('braised').

As an appetiser (antipasto), bresaola is usually sliced paper-thin and served at room temperature or slightly chilled.