^{<small>1</small>}/<small>16</small> cup olive oil

Olive oil is a liquid fat extracted from the fruit of the Olea europaea tree, native to the Mediterranean region. The oil is obtained through pressing or centrifugation of olive fruits, with quality and flavor varying significantly based on harvest timing, processing method, and cultivar. Extra virgin olive oil, the highest grade, is cold-pressed from the first harvest and retains a fruity, complex flavor profile ranging from grassy and herbaceous to buttery and nutty. Refined olive oils lack these sensory qualities but possess higher smoke points suitable for cooking at elevated temperatures.

Olive oil exists on a spectrum of oxidation and acidity levels. Extra virgin olive oil must have a free acidity of less than 0.8% and is often described with tasting notes of herbs, almonds, or stone fruit. Virgin and refined oils undergo chemical processing, reducing their nutritional density and flavor complexity. The oil's composition—approximately 70-75% oleic acid (a monounsaturated fat) with minor polyphenolic compounds—defines its stability and health profile.

Olive oil serves as the foundational fat across Mediterranean cuisine, applied both as a finishing oil and a cooking medium depending on its grade. Extra virgin olive oil, with its lower smoke point (160–210°C), is reserved for dressings, drizzling, dipping, and finishing dishes to preserve its aromatic compounds and nutritional polyphenols. Refined and light olive oils, with higher smoke points (210–240°C), are suitable for sautéing, roasting, and frying. In Italian cuisine, olive oil is essential to soffritto (a base of sautéed aromatics); in Spanish cooking, it features prominently in gazpacho and pan con tomate; and in Greek kitchens, it is used generously across appetizers, salads, and vegetable preparations. The oil's flavor compatibility ranges from delicate fish to robust vegetables, with regional oils often paired traditionally with local cuisines.