Have you ever wondered why some oils have an off taste or an unpleasant aftertaste? When it comes to extra virgin olive oil, the law leaves no room for compromise: extra virgin olive oil is “an olive oil of superior category obtained directly from olives and solely by mechanical processes.”
But what does it really mean?
It means that every drop must come from the olive fruit pure, with very low acidity and strictly controlled chemical and physical characteristics. And that’s not all: the real challenge of extra virgin olive oil is to remain free of defects. European regulation (Reg. 2568/91 and subsequent amendments) states that an extra virgin must express fruitiness, bitterness, and pungency, without any unpleasant smell or taste.
In short, behind a bottle of extra virgin olive oil lies a world of aromas, flavors, and, above all, subtle defects that can turn a premium product into an ordinary oil. And knowing these defects is the key to becoming a true connoisseur.
But what does “extra virgin” really mean?
- Maximum acidity: 0.8 g per 100 g of oleic acid
- Chemical parameters: peroxide value, spectrophotometric indices, and fatty acid ethyl ester levels
- Sensory attributes: fruitiness, bitterness, and pungency must be present, with no perceivable defects.
In other words, a true extra virgin olive oil cannot have any organoleptic defects: if even a small defect is detectable, the oil is downgraded to “virgin” or “lampante”.
Defective oils: what happens
Oils that do not meet the standards — too high acidity, sensory defects, or incorrect chemical characteristics — do not go directly onto our tables. Instead, they are refined and blended with virgin or extra virgin oils to become olive oil. Refining operations take place in specialized facilities, far from the authentic flavor of olives.
The defects of olive oil: how to recognize them
Tasting olive oil is not just about perceiving fruitiness or bitterness: it is an art. Understanding defects requires training, attention, and a lot of practice. It is not only about smells and tastes, but about assessing their intensity and classifying them correctly.
How are olive oils classified
| Category | Median of defects | Fruitiness | Note |
|---|---|---|---|
| Extra virgin | 0 | >0 | Fruitiness, bitterness, and pungency present; no defects. |
| Virgin | 0–3,5 | >0 | Some defects are acceptable |
| Lampante | >3,5 | 0 | Not fit for consumption; intended for refining. |
💡 Even a single perceivable defect downgrades the oil, so careful attention during tasting is essential.
The consumer’s tool: tasting
No machinery or chemical analysis is needed at home: your palate is the only effective tool. Tasting, comparing, and understanding fruitiness and defects is the only way to choose a high-quality extra virgin olive oil.
“Good” aromas: the sensations you should look for in EVO oil
When you smell a true extra virgin, your nose should detect:
| Attribute | Description |
|---|---|
| Fruitiness | Green olfactory notes: fresh olives, fresh or just-mown grass, tomato, artichoke, green almond |
| Bitterness | Taste perception reminiscent of artichoke leaf, radicchio, and slightly bitter herbs. |
| Pungency | A burning sensation in the throat of varying intensity. |
These aromas are an indication of healthy olives that have been properly processed.
“Unpleasant” aromas: signs of defects
Defects are numerous and can result from cultivation, harvesting, extraction, or storage. If you detect any of these smells, among the main ones, it means the oil is no longer extra virgin or has defects:
| Defect | Smell / Description |
|---|---|
| Rancid | Stale butter, oxidation from old or poorly stored oil |
| Winey-vinegary | Wine or vinegar, excessive fermentation. |
| Moldy / musty | Closed cellar, moldy olives, or olives stored too long in confined spaces. |
| Metallic | Contact with machinery or metal containers. |
| Earthy | Olives that have come into contact with soil and have not been washed. |
| Cooked / heated | Olive paste that has been overheated, a fried or cooked smell, or anaerobic fermentation in piled olives. |
| Fusty / muddy sediment | Odor from oil left in contact with decantation sludge. |
| Weevil | Flavor caused by olives attacked by the olive fruit fly larva. |
Consigli pratici per assaggiare l’olio evo a casa
- Taste different oils to train your palate.
- Store oil in the dark and away from heat.
- Always check for fruitiness and absence of defects.
Extra virgin olive oil quality: transparency and chemical analysis
If you want to learn more, contact us without hesitation: we will be happy to provide you with the complete chemical analyses of our extra virgin olive oils, because we believe that quality and transparency always go hand in hand.
