Official EVOO tasters must follow precise rules, and use the right tools. Specifically, the famous cobalt blue glass.
This glass disguises the color as color is NO indication of quality for EVOO, one of the big myths of EVOO.
Using the right glass is mandatory for certified tastings and evaluations; in fact every detail is specified, from its dimensions to the material and design.
How to taste EVOO
When tasting for yourself, be sure to look for these three positive attributes of true extra virgin olive oil:
Fruitiness, which you can sense from smelling the oil' pleasant fruit flavors.
“Bittery”ness, reflected in a pleasantly bitter taste that is a natural expression of the olive.
Pungency, the peppery or scratchy sensation in your mouth and throat when you swallow the oil. This is a sign of the abundant nutrients. Sometimes oils are referred to as one or two ‘coughers’ as this is a common response to pungency.