How to Taste Olive Oil Like a Professional

By Arianna, certified EVOO sommelier · April 2026 · 6 min read

Most people have never really tasted olive oil. They drizzle it on salad, maybe dip some bread, and that's about it. But tasting olive oil properly — the way we do it at our grove in Puglia — is a completely different experience. It's closer to wine tasting than you might think, and once you learn the technique, you'll never look at that bottle on your kitchen counter the same way again.

Arianna has been tasting olive oil since before she could reach the table. Four generations of her family have farmed olives on this land outside Brindisi, and after earning her certification as an EVOO sommelier, she now guides visitors through the same method used by professional panels around the world. Here's how she does it.

Start with the right glass

If you've ever seen an official olive oil tasting, you probably noticed the small, tulip-shaped glasses in dark cobalt blue. There's a good reason for that colour: it hides the oil. Professional tasters don't want to see whether the oil is golden or green, because colour tells you almost nothing about quality. A brilliant green oil can be terrible, and a pale gold one can be extraordinary. The blue glass removes that bias entirely.

At home, you can use any small glass — a shot glass or espresso cup works fine. The important thing is that it fits comfortably in your cupped hands, because the next step is all about warmth.

Warm it in your hands

Pour about a tablespoon of oil into the glass, then cover the top with one hand and cup the bottom with the other. Hold it like this for a minute or two. You're warming the oil to around 28°C — close to body temperature — which is the sweet spot for releasing its volatile aromatic compounds. Think of it like swirling a glass of red wine to open it up. Same idea, different method.

While you wait, gently swirl the oil around the inside of the glass. This coats the walls and gives those aromas more surface area to work with.

The 3 S's: swirl, sniff, slurp

This is the heart of professional olive oil tasting, and Arianna teaches it to every guest who visits Masseria Cantasole.

Swirl. Give the glass a few more gentle rotations. You've already been doing this while warming, but one final swirl right before you smell concentrates the aromas at the top of the glass.

Sniff. Uncover the glass and bring it to your nose. Take short, deliberate sniffs — don't just inhale once. You're looking for the oil's fruitiness, which is the first of three positive attributes. Does it smell like fresh-cut grass? Green tomatoes? Artichoke? Ripe banana or almond? All of these are legitimate aromas of quality extra virgin olive oil, and they vary enormously depending on the cultivar, the harvest timing, and the terroir. Our Ogliarola and Cellina di Nardò olives, for instance, tend toward artichoke and green almond when harvested early.

Slurp. This is the part that surprises people. Take a small sip of oil and — this is crucial — suck air through it. Really slurp it, the way you might slurp hot soup. It feels strange at first, but the aspiration spreads the oil across your entire palate and sends the aroma compounds up through your retronasal passage, where you perceive flavour most intensely. Let the oil coat your tongue and the inside of your cheeks for a few seconds before swallowing.

The three signs of quality: fruity, bitter, pungent

Here's where most people get tripped up. The three positive attributes of extra virgin olive oil are fruity, bitter, and pungent. Fruity makes sense to everyone. But bitter? Pungent? Aren't those bad things?

No. And this is probably the single most important thing to understand about olive oil.

Bitterness — that clean, green bite you feel on the sides and back of your tongue — comes from polyphenols, the same antioxidants that make good olive oil so healthy. A high-quality early-harvest oil should taste bitter. If it doesn't, it's likely made from overripe olives or has been sitting on a shelf too long.

Pungency is the peppery kick you feel in the back of your throat. A really fresh, well-made oil will make you cough. That's the oleocanthal — a natural anti-inflammatory compound that works on the same receptor as ibuprofen. When guests cough at their first tasting here, Arianna always smiles. "That's the good stuff," she says.

Together, these three attributes — fruity, bitter, pungent — form the quality triangle. The best oils have all three in balance.

What defects taste like (and why they matter)

Just as important as recognising good oil is learning to spot bad oil. Professional panels are trained to identify a long list of defects, but three are by far the most common:

Fusty — a fermented, swampy flavour caused by olives sitting in piles too long before pressing. It's the most common defect in the world and, unfortunately, many people have grown so accustomed to it that they think it's what olive oil is supposed to taste like.

Musty — a mouldy, damp-cellar aroma from olives stored in humid conditions. Closely related to fusty, but more specifically tied to fungal growth.

Rancid — the stale, waxy, crayon-like taste of oxidised oil. Every oil will eventually go rancid with time and exposure to light and heat. If your oil tastes flat and vaguely like putty, it's past its prime.

What "extra virgin" actually means

The term "extra virgin" isn't just marketing. It has a precise legal and sensory definition. To qualify, an olive oil must meet two sets of criteria:

Chemical: Free acidity must be below 0.8%, and a range of other chemical markers (peroxide value, UV absorbance, and more) must fall within strict limits. These measure freshness, purity, and proper handling.

Sensory: A trained panel of tasters must confirm that the oil has some degree of fruitiness and zero defects. Not "low" defects — zero. Any perceptible fusty, musty, rancid, or other off-flavour disqualifies it from the extra virgin category entirely.

This dual requirement — chemistry plus human palate — is what makes extra virgin olive oil unique among food products. No machine can fully replace the trained nose and tongue.

Supermarket oil vs. fresh EVOO

The oil you find on a supermarket shelf in London or New York has typically been bottled for months, shipped across borders, and stored under fluorescent lights. Even if it started life as genuine extra virgin, time and conditions work against it. Olive oil is a fresh product — closer to fresh juice than to wine. It doesn't improve with age.

The difference between a mass-produced supermarket blend and a freshly pressed, single-estate oil is as dramatic as the difference between instant coffee and a properly pulled espresso. During our tastings at the masseria, we often pour a supermarket oil alongside our own harvest. The reaction is always the same: a moment of surprise, then a long silence, then "I can never go back."

That's the thing about learning to taste olive oil properly. Once you know what to look for — the fruit, the bitterness, the pepper, the clean finish — you can't un-know it. And honestly, that's the whole point.