Balsamic vinegar is a dark, sweet-tart vinegar originating in Italy's Emilia-Romagna region, traditionally made by cooking down grape must (usually from Trebbiano and Lambrusco grapes) rather than fermenting wine, then aging it in a succession of wooden barrels, often oak, chestnut, and cherry. The prestigious, DOP-certified Traditional Balsamic Vinegar of Modena and Reggio Emilia is aged a minimum of 12 years, with some aged 25 years or longer; most balsamic vinegar sold commercially, labeled 'Balsamic Vinegar of Modena' (IGP), carries no such aging requirement and is typically aged only briefly. Both are used across Italian cooking, drizzled over salads, grilled meats, and fresh fruit, and worked into marinades, dressings, and reduction sauces. Balsamic vinegar's complex flavor, with notes of caramel, fig, and oak, pairs well with cheeses, fruit, nuts, and rich or fatty foods, where its acidity helps cut through heaviness.