How to tell good olive oil: choosing the best bottle
More than half of the extra virgin olive oils tested didn't reach the grade. How to tell good oil by the label, the price and the taste.
In this article
You can tell good olive oil by a few things on the label and a few things in your glass. On the label: the name extra virgin, a clear country or ideally a region, a harvest year or a best before date that's still far off, and a dark bottle, tin or pouch. In your glass: a fresh smell of grass, green apple or tomato, and a taste that's a little bitter with a peppery tickle in your throat. If it smells of old nuts, candle wax or a damp cellar, it isn't good. Below we go through each point, and explain why the price says more than you might like.
Why this matters: the October 2026 test
In October 2026 the Dutch consumer TV programme Keuringsdienst van Waarde had 27 bottles of olive oil tested, all sold as extra virgin. An officially recognised tasting panel judged them on smell and taste. The result:
- 12 bottles really were extra virgin.
- 11 bottles were one grade lower: virgin.
- 4 bottles were lampante, oil that isn't really fit to eat as it is.
So more than half didn't reach the grade on the label. What stood out: not a single oil under €10 per litre came out as extra virgin. But a high price wasn't a guarantee either. A bottle at almost €65 per litre was judged virgin. The programme itself points out that it's a snapshot. Oil changes, and a next test could turn out differently. Still, it shows you can't blindly trust the front of the bottle.
On the label: seven things to check
1. The legal name
Look for extra virgin olive oil. If it only says olive oil, pure, classic or light, it's usually a mix of refined and virgin oil. Fine for cooking, but not what you buy for the taste of olives. More on this in what is extra virgin olive oil.
2. Where is it from?
A good bottle tells you the country, ideally the region, and sometimes even the grove or the mill. If the label says the oil comes from several EU countries, or from the EU and beyond, oil from different countries has been mixed together. That isn't forbidden, but you know little about what you're buying and how fresh it is.
3. The harvest year
A harvest year isn't required, but it's a very good sign. It's only allowed if 100% of the oil in the bottle comes from that harvest. Olives are picked in autumn and winter, so you'll often see something like harvest 2025/2026. The more recent, the better. Olive oil doesn't get better with age like wine. It's at its best in the first year after harvest.
4. The best before date
No harvest year? Then the best before date tells you something. Many producers choose a date about eighteen months to two years after bottling. If the date is still far off, the oil was probably bottled recently. If it's close to the date, leave it on the shelf.
5. The packaging
Light and heat break olive oil down. That's so important that, under EU rules, every bottle has to say you should keep it away from light and heat. So choose a dark glass bottle, a tin or a pouch. Clear glass or plastic is a bad sign, especially if the bottle sits under bright shop lights.
6. The olives
If the olive variety is named, like Arbequina, Picual, Koroneiki or Coratina, the maker knows exactly what's inside and wants to show it. Every variety has its own flavour. Arbequina is mild and buttery, Picual is bold and peppery.
7. What you can ignore
- Superior category. Every bottle of extra virgin has to carry a line like "superior category olive oil obtained directly from olives and solely by mechanical means". So it's required text, not an extra quality mark.
- A big acidity number on the front. Acidity tells you how carefully the oil was made, but nothing about how it tastes now. Officially, it may also only appear together with three other lab values.
- First press. Modern mills only press once. It sounds nice, but says little.
- The colour of the oil. More on that below.
The price: why good oil can't be dirt cheap
You need about 5 kilos of olives for a litre of olive oil. With an early harvest, when the olives are still green, it can be up to twice that. Add picking, milling, bottling and transport. A litre of good extra virgin for a few euros is close to impossible.
After the dry years in Spain, which pushed prices up sharply in 2023 and 2024, the Spanish harvest recovered in the 2024/2025 season to about 1.4 million tonnes, and prices came down. But the lesson from the test stands: nothing under €10 per litre reached the extra virgin grade. A higher price is no guarantee, but a very low price is a warning.
Tasting: how to test olive oil at home
The best proof is in your glass. This is how tasters do it, and you can too:
- Pour a tablespoon of oil into a small glass.
- Hold the glass in one hand and cover it with the other. Swirl a few times so the oil warms up a little.
- Smell. Good oil smells fresh and green: cut grass, green apple, tomato leaf, artichoke, almond.
- Take a small sip, and with your lips almost closed, draw in a little air. That releases the flavour.
- Notice what you taste. Fruity, a little bitter on your tongue and a peppery tickle at the back of your throat. Does it make you cough? Then it's full of polyphenols. That's a good sign.
How bad oil smells and tastes
| You smell or taste | What's wrong |
|---|---|
| Old nuts, candle wax, putty or crayons | Rancid: the oil has oxidised, from age, light or heat. |
| Damp cellar, mould | Musty: the olives went mouldy before they were milled. |
| Vinegar or wine | The olives started to ferment. |
| A brown, sweetish, slightly dirty smell | The olives sat in a pile for too long. |
| Nothing, or just a greasy feel | Not a defect, but a flat, old or refined oil. |
Three myths you can forget
The fridge test
The idea: real extra virgin goes solid in the fridge. Not true. Whether oil sets in the cold depends on the olives, the weather while they grew and how the oil was filtered. Regular olive oil can turn cloudy in the fridge too, and good extra virgin sometimes doesn't.
Greener is better
Colour says little. Green comes from chlorophyll in the olive, and some excellent oils are golden yellow. That's why official tasters use blue glasses, so the colour doesn't influence them.
Cloudy means unfiltered, so it's better
Unfiltered oil can be lovely, but the sediment at the bottom can make the oil spoil faster. So cloudiness says nothing about quality. Use unfiltered oil fairly quickly.
Your checklist for the shop
- Extra virgin olive oil as the legal name.
- One country, ideally a region, not oil mixed from several countries.
- A recent harvest year, or a best before date that's still far off.
- Dark glass, tin or pouch.
- Ideally the olive variety on the label.
- A price that fits what's inside: not under €10 per litre.
- At home: taste it. Fresh, bitter and peppery is good. Old nuts or candle wax is not.
How we do it
We started Verdé Club because we no longer knew what was in our own bottle. So we're clear about our oil. Our Cooking Oil is 100% Arbequina olives. Our Finishing Oil is mostly Picual, with Arbosana and Hojiblanca. Both come from family producers in Seville and Toledo in Spain, are early harvest, cold extracted and certified organic. We have every batch lab tested. Curious about the results? Send us a message.
Frequently asked questions
What is the best olive oil in the Netherlands?
That changes every year, and even from batch to batch. Use the checklist above and taste at home. In the October 2026 test, both good and bad oils turned up among big brands and supermarket own brands.
How can you tell if olive oil is fake?
At home you can't measure whether oil has been cut with cheaper oil. But you can watch for warning signs: a very low price, no origin or oil mixed from several countries, clear glass and no harvest year. And taste it: real extra virgin smells fresh and is a little bitter and peppery.
Is more expensive olive oil better?
Not always. A higher price is no guarantee, as the test showed. But at a very low price, the chance of real extra virgin drops sharply.
What does the acidity on the label mean?
How many free fatty acids are in the oil. The lower, the more carefully the olives were handled. Extra virgin can have 0.8% at most. You can't taste acidity, and it says little about how fresh the oil is now.
Why does good olive oil make you cough?
Because of polyphenols, natural compounds from the olive. Early harvest oil contains more of them. That tickle is a good sign.
Sources
- Keuringsdienst van Waarde (KRO-NCRV), results of the extra virgin olive oil test, 9 October 2026. In Dutch.
- European Commission, Delegated Regulation (EU) 2022/2104, summarised by the Food Safety Authority of Ireland (harvest year, storage instruction, origin of mixed oils, acidity on the label).
- Olive Oil Times, Spanish production and prices.
- Voedingscentrum (Netherlands Nutrition Centre), Olijfolie. In Dutch.
