If you've been keeping your best olive oil locked away for salads and drizzling while reaching for a cheaper oil when the pan gets hot, you're not alone. The idea that extra virgin olive oil can't handle heat is one of the most repeated pieces of kitchen advice around. It's also not quite right.
Here's what the research actually shows.
Where the myth comes from
The concern about cooking with EVOO usually comes down to one number, the smoke point. Smoke point is the temperature at which an oil starts to visibly smoke, and somewhere along the way it became the standard way people judged whether an oil was safe to cook with. Extra virgin olive oil has a smoke point that ranges roughly between 350°F and 410°F depending on quality, which gets compared unfavorably to refined oils that can sit higher on paper.
The problem is that smoke point is not actually a reliable measure of how an oil behaves under heat. What matters for cooking is oxidative stability, meaning how well an oil resists breaking down when exposed to heat. Those are two different things, and the research makes clear they don't always move together.
What the research actually found
A 2018 study published in Acta Scientific Nutritional Health tested ten of the most commonly used cooking oils under real cooking conditions. In the first trial, oils were heated to 464°F for around 20 minutes. In the second, they were used in a deep fryer at 356°F for six hours. Extra virgin olive oil produced the fewest harmful byproducts of all ten oils tested, including oils with significantly higher smoke points. It showed greater oxidative stability than canola oil, sunflower oil, and several other options that home cooks are routinely told to use for high-heat cooking.
A separate study published in Food Chemistry compared free radical formation and oxidation when heating peanut oil and extra virgin olive oil. The researchers found that more heat was needed to trigger oxidation in the EVOO than in the peanut oil.
The North American Olive Oil Association puts it plainly. In deciding which oil to use for cooking, stability matters more than smoke point, and extra virgin olive oil has been found to be the most stable cooking oil tested.
Why EVOO holds up under heat
Two things give extra virgin olive oil its heat stability. The first is its fatty acid composition. Olive oil is high in oleic acid, a monounsaturated fat that is naturally more resistant to oxidation than the polyunsaturated fats that make up the bulk of seed oils like canola, sunflower, and grapeseed. Polyunsaturated fats oxidize quickly under heat. Monounsaturated fats do not.
The second is polyphenols. As we covered in our previous posts (Why Does Good Olive Oil Taste Bitter and Peppery? and How to Tell If Your Olive Oil Has Gone Bad), polyphenols are the natural antioxidant compounds responsible for the bitterness and peppery sting in a fresh, high quality EVOO. Under heat, those same compounds act as a protective shield against oxidation, sacrificing themselves to keep the oil stable. Refined oils have had these compounds stripped out during processing, which is part of why they behave differently even when their smoke points look better on paper.
Freshness also plays a role. A fresh, low-acidity EVOO will have a higher effective smoke point and better stability than an older or lower quality one. Which is another reason harvest date and freshness matter beyond just flavor.
What actually happens at normal cooking temperatures
Most home cooking happens between 300°F and 375°F. Sautéing vegetables, searing chicken, roasting in the oven, pan-frying fish. These all fall within or close to the range that EVOO handles without issue. Deep frying typically reaches 350°F to 375°F, and as the 2018 study showed, EVOO performed well even at those temperatures over extended periods.
The scenarios where you might push past EVOO's range are high-heat searing for a very fast crust, or certain wok cooking. Those are genuine edge cases. For everything else in a home kitchen, the concern is mostly unfounded.
How I use our Signature Olive Oil in the kitchen
Most of the time, I use our Signature Olive Oil as a finishing oil, since that's when you get the most of its natural polyphenols and flavor still intact. But when a dish calls for higher heat, I use it without hesitation. Garlic and vegetables in the pan, a quick roast, fish cooked simply, the oil holds up exactly the way the research says it should.
One combination I keep coming back to is sautéed cherry tomatoes in the Signature Olive Oil until they just start to blister, then finished with a drizzle of our 25 year wood barrel aged dark balsamic. The heat draws the sweetness out of the tomatoes, the oil holds its character through the cooking, and the balsamic at the end adds a deep, punchy contrast. It works over pasta, over good bread, or just on its own.
The 18 year wood barrel aged dark balsamic is more delicate, so it suits dishes where you want the olive oil's flavor to stay in front. Either way, the pairing starts with an oil that has something to say.
You can find our Signature Olive Oil and both balsamics at dorotabotanicals.net.
Sources referenced:
- Gertz, C. et al. "Evaluation of chemical and physical parameters of various cooking oils under high heat stress." Acta Scientific Nutritional Health 2(6), 2-11 (2018).
- Tomassetti, M. et al. "Biosensors for monitoring the isothermal breakdown kinetics of peanut oil heated at 180°C. Comparison with results obtained for extra virgin olive oil." Food Chemistry 140, 700-710 (2013). https://doi.org/10.1016/j.foodchem.2012.10.131
- North American Olive Oil Association, "Olive Oil Smoke Point." https://www.aboutoliveoil.org/olive-oil-smoke-point
- UC Davis Olive Center, "How to Choose the Best Olive Oil." https://www.ucdavis.edu/magazine/how-to-choose-the-best-olive-oil