Olio extravergine d'oliva (extra-virgin olive oil) is the foundational fat and flavouring of Italian cuisine—cold-pressed oil from fresh olives with acidity below 0.8% and no sensory defects, produced across every region of central and southern Italy (and parts of the north) in a diversity of styles that ranges from the peppery, assertive oils of Puglia and Calabria to the delicate, fruity oils of Liguria and Lake Garda. EVOO is not a single product but a vast family: Italian law recognises 42 DOP olive oils and 5 IGP designations, each reflecting specific cultivars, terroir, and production methods. The key cultivars include Frantoio and Leccino (Tuscany), Taggiasca (Liguria), Coratina and Ogliarola (Puglia), Carolea (Calabria), Nocellara (Sicily), and Casaliva (Lake Garda)—each producing oil with distinct flavour profiles. A freshly pressed Tuscan oil (Frantoio-dominant) is green-gold, intensely peppery (the characteristic 'pizzica' or throat-catching pepperiness comes from oleocanthal, a natural anti-inflammatory compound), with notes of artichoke, green tomato, and fresh grass. A Ligurian Taggiasca oil is pale gold, mild, sweet, and almond-like. A Pugliese Coratina oil is deep green, powerfully peppery and bitter, with the most robust flavour of any Italian oil. Understanding these differences is essential to Italian cooking: you use mild oil for delicate fish and salads, robust oil for bruschetta and bean soups, and you never heat expensive EVOO to smoking point (which destroys its flavour compounds). The harvest season (October-December) produces olio nuovo—unfiltered, vivid green, intensely flavoured new-harvest oil that is a seasonal delicacy drizzled over everything.
Cold-pressed from fresh olives, acidity below 0.8%. Enormous regional variation in flavour. Match oil intensity to the dish. Use for both cooking and raw finishing. Olio nuovo (new harvest) is a seasonal treasure. Store away from light and heat. Quality degrades over time—use within 12-18 months.
Look for a harvest date (not just a 'best by' date) on the bottle—the freshest oil is the best oil. Store in a cool, dark place in dark glass. A good EVOO will make your throat catch slightly (the 'cough' is oleocanthal—it's a sign of quality, not a defect). Use robust oil for drizzling over soups, beans, and bruschetta; mild oil for fish, salads, and delicate dishes. The dregs at the bottom of unfiltered oil are flavour gold—shake before using.
Treating all EVOO as identical (regional differences are vast). Heating premium oil to smoking point (destroys flavour—use for finishing). Storing in clear bottles near the stove (light and heat cause rancidity). Keeping oil too long (best within 12-18 months of harvest). Buying based on price alone (cheap EVOO is often defective or adulterated).
Tom Mueller, Extra Virginity; Fausto Ferrini, Olive Oil: A Natural History