Why the Variety Matters More Than the Label

Walk into any good deli and you will find shelves groaning with bottles labelled simply "extra virgin". That tells you the oil passed the legal grade, but almost nothing about how it will taste. The single most useful clue on the label is the variety — Picual, Arbequina, Frantoio, Koroneiki — because each cultivar carries its own genetic signature of aroma, bitterness and pepper.

Think of it as the difference between grape varieties in wine. A Chardonnay and a Sauvignon Blanc are both white wine, but nobody would serve them interchangeably. The same logic applies here. A Picual from Jaén and an Arbequina from Catalonia are made by similar methods from fruit grown under the same sun, yet they taste like different food groups entirely.

Two other things shape flavour before the variety even gets a say: ripeness at harvest and the mill. Olives picked green in October give punchier, more bitter oil; fruit left to swell and purple into December yields softer, rounder oil. Early-harvest oils also carry more polyphenols, the antioxidants that give that rasping tickle at the back of your throat.

The Grassy and Assertive End of the Spectrum

These are the oils that announce themselves. They are green in aroma, often bitter on the tongue and fiercely peppery in the throat — the sensation that makes first-time tasters cough.

• Picual — Spain's workhorse, grown across Andalusia. Expect cut grass, fig leaf and tomato vine, with a bitterness that lingers. It is remarkably stable, so it keeps well, and it stands up to grilled lamb, garlicky tomato dishes and anything off a barbecue.
• Coratina — from Puglia in southern Italy, and something of a bruiser. Artichoke, chicory and a peppery finish that can stop conversation. Wonderful drizzled over bitter greens, white beans or a thick ribeye.
• Frantoio — the backbone of Tuscan blends. Green almond, artichoke and a clean, warming pepper that fades slowly. It is the oil for ribollita, cannellini beans and a plain tomato bruschetta.
• Koroneiki — Greece's flagship variety, especially in the Peloponnese and Crete. Dense, herbal and grassy, with a peppery kick. Excellent over feta, oregano and roasted vegetables.

The Balanced Middle Ground

If assertive oils feel like a lot first thing in the morning, the middle of the spectrum is where most everyday cooking happens. These oils have fruit and a little bitterness, but nothing shouty.

• Hojiblanca — Spanish, and named for its pale, silvery leaves. Green apple, almond and a gentle, sweetish finish. A lovely all-rounder for salads, mayonnaise and lightly cooked fish.
• Leccino — Tuscan, softer and more delicate than Frantoio, with faint pine and a mild pepper. Good with mozzarella, courgette and egg dishes.
• Kalamata — yes, the table olive, but a fine oil too. Rounded, fruity and slightly sweet, with a peppery tail. Useful for marinades and drizzling over bread.

The Buttery and Gentle End

At the soft end sit the oils that taste almost like a fruit juice — low bitterness, low pepper, and aromas of ripe almond, banana and sometimes apple.

• Arbequina — the great charmer, originally from Catalonia and now planted widely. Buttery, sweet and mild, with a whiff of green almond. Beautiful on grilled sole, in cakes, and drizzled over vanilla ice cream with a pinch of sea salt.
• Arbosana — a close cousin, slightly more peppery and grassy, with good structure. A good bridge for people easing away from bland supermarket oil.
• Taggiasca — from Liguria, delicate and pale, with notes of pine nut and sweet almond. It is the oil for seafood, focaccia and a bowl of pasta with potatoes and green beans.

How to Taste Them Properly

You do not need special equipment — a small glass and a slice of apple will do. Pour a tablespoon into a glass, cup it in your palm to warm it slightly, and cover it for a minute. Then sniff, sip a little, and draw air across it as though whistling inwards.

Notice three things in order. First, the aroma: grass, tomato leaf, artichoke, almond, herbs. Second, the bitterness, which you will feel at the sides of your tongue. Third, the pepper, which arrives at the back of the throat and can make you cough — that is the polyphenols at work, and it is a sign of freshness, not a fault.

Ignore colour entirely. A deep green oil is not automatically better than a golden one; hue depends on variety, ripeness and pigment, not quality. What matters is aroma, balance and that lively tingle.

Building a Small Rotation at Home

Most kitchens only need two or three bottles, and buying by variety is far more useful than buying by brand. A practical setup looks like this:

• One assertive oil such as Picual or Coratina, for grilling, beans, bitter greens and tomato sauces.
• One soft oil such as Arbequina or Taggiasca, for fish, mayonnaise, baking and finishing raw dishes.
• One all-rounder such as Hojiblanca or Leccino, for daily salads and roasting.

Store them in dark glass or tin, somewhere cool and away from the hob, and use them within a year of pressing — oil is juice, and it fades. Buy the smallest bottle you will get through in a couple of months rather than a litre you will nurse for two years.

Start tasting side by side, even with two bottles, and the vocabulary will come quickly. Within a few weeks you will know whether your palate leans towards the green, bitter and peppery, or the soft, buttery and sweet. Both are correct — the pleasure lies in knowing which one you are reaching for, and why.