It is often said that the best olive oil in the world comes from Italy (of course. the Greeks, Spaniards, and Californians may contest this!). Olive oil is certainly the most commonly used fat in Italian cuisine and is a big part of the constellation of delicious flavors that define Italian food.
The olive is the fruit of the olive tree (olea euopaea). The trees normally take five years to bear fruit, and the best olives (and olive oil) come from trees that are 100-200 years old. Plucked from the tree, olives are extremely bitter and virtually inedible, and must be cured in a saltwater brine or oil before eating.
The traditional method of extracting olive oil is essentially the same today as it has been for over a thousand years. In Italy olives are harvested in November. Workers lay nets around the base of the tree to catch the fruits as they fall. Then the olives are taken to the mill.
Giant stones weighing several tons are used to crush the olives and pits into mash.
The olive mash is then spread onto thin mats. These mats are stacked, and placed into a machine "press." As the press applies several hundred pounds of pressure, oil and water from the mash seep out of the mats, and drip into collection vats. In the traditional method, no heat is applied in the pressing--this oil is therefore termed "first cold pressed." The oil is allowed to settle, and any vegetable water is removed either by centrifuge or decantation.
Oil extracted from this mechanical pressing of the olive is described as "virgin" olive oil, because it
is pure, unrefined and unprocessed. "Extra" is the highest grade for olive oil--the best you can buy. The virgin oil produced from the mechanical pressing described above may be called "extra" if it has less than 1% free oleic acid, and if it exhibits superior taste, color and aroma. Thus, the "extra" in extra virgin olive oil means "premium," or simply, "the best."
Ordinary "olive oil" is actually a blended oil product. Olive oil producers start with low quality virgin olive oils. For these oils to be fit for consumption, they must be refined using mechanical, thermal and/or chemical processes. The resulting "refined olive oil" is largely colorless and tasteless. Before the resulting product is sold as "olive oil," the producer blends into the refined olive oil a percentage of quality virgin olive oil to provide color and taste.
Light olive oil is a variation on ordinary olive oil. Producers of this product use a highly refined olive oil, and add less quality virgin oil than that typically used to blend olive oil. The only thing "light" about light olive oil is the taste and color; it has the same caloric and fat content as other oils.
In addition to culinary uses, olive oil is used in many products, including luscious soaps, creams and cosmetics. At Time of Your Life Tours we know a lovely little shop in Florence where the owner is an olive oil expert and where you can find a variety of lovely olive oil items to bring home for yourself or for gifts.