Extra-virgin olive oil is an unrefined oil and the highest-quality olive oil you can buy. There are very specific standards oil has to meet to receive the label “extra-virgin.” Because of the way extra-virgin olive oil is made, it retains more true olive taste, and has a lower level of oleic acid than other olive oil varieties. It also contains more of the natural vitamins and minerals found in olives.
Extra-virgin olive oil is considered an unrefined oil since it’s not treated with chemicals or altered by temperature. What sets it apart is the low level of oleic acid and the absence of sensory flaws. It contains no more than 1% oleic acid and typically has a golden-green color, with a distinct flavor and a light peppery finish.
While you can cook with extra-virgin olive oil, it does have a lower smoke point than many other oils, which means it burns at a lower temperature (410ºF or 210ºC ). Save the good quality stuff for dipping bread, dressing, dips, cold dishes, and use the less expensive stuff for cooking and baking. When heated, olive oil is the most stable fat, which means it stands up well to high frying temperatures. Its high smoke point (410ºF or 210ºC) is well above the ideal temperature for frying food (356ºF or 180ºC). The digestibility of olive oil is not affected when it is heated, even when it is re-used several times for frying