Extra Virgin Olive Oil
Extra virgin olive oil is made simply by crushing olives and extracting the juice. It is the only cooking oil that is made without the use of chemicals and industrial refining.
Extra virgin olive oil must have no taste “defects.” It needs to have a nice flavor of fresh olives and achieve higher scores in lab tests for its chemical composition than other grades.
Since extra virgin olive oil is simply fruit juice without any additives, its quality and taste are influenced by the varieties of olives, the terroir where they were grown, and the countless decisions and production practices of a dedicated producer.
In chemical terms extra virgin olive oil is described as having a free acidity, expressed as oleic acid, of not more than 0.8 grams per 100 grams and a peroxide value of less than 20 milliequivalent O2. It must be produced entirely by mechanical means without the use of any solvents, and under temperatures that will not degrade the oil (less than 86°F, 30°C).
In order for an oil to qualify as “extra virgin” the oil must also pass both an official chemical test in a laboratory and a sensory evaluation by a trained tasting panel recognized by the International Olive Council. The olive oil must be found to be free from defects while exhibiting some fruitiness.
Olive oil tasters describe the «positive attributes» using the following terms:
- Fruity: Having pleasant spicy fruit flavors characteristic of fresh ripe or green olives. Ripe fruit yields oils that are milder, aromatic, buttery, and floral. Green fruit yields oils that are grassy, herbaceous, bitter, and pungent. Fruitiness also varies with the variety of olive.
- Bitter: Creating a mostly pleasant acrid flavor sensation on the tongue.
- Pungent: Creating a peppery sensation in the mouth and throat