Truffle oil is a moern culinary ingredient added to foods, which is intended to impart the flavor and aroma of truffles to a dish. Most truffle oils are not, in fact, made from actual truffles, but are instead a synthetic product that combines aromatic hydrocarbons (2,4-dithiapentane), one of numerous organic aromatics found in real truffles with an olive oil base. A few more expensive oils are alleged to be made from truffles or the by-products of truffle harvesting and production, though the flavor of truffles is difficult to capture in an oil.