Is Olive Oil Safe for Deep Fat Frying? | PJ Kabos Guide — Part XIII
- Jan 10, 2025
- 12 min read
Updated: Apr 29
PJ Kabos Guide to Olive Oil — Part XIII
This article is Part XIII of the PJ Kabos Guide to Olive Oil — where ancient olive-growing wisdom meets modern science, your guide to choosing, tasting, and enjoying exceptional extra virgin olive oil — especially high-phenolic varieties. We hope it inspires you in your olive-oil journey.
In this article, we turn our attention to a common and important cooking question: Is olive oil safe for deep fat frying? With so much conflicting advice, it’s worth pausing for a closer, clearer look.
A Clear Answer
Yes — according to the USDA Food Safety and Inspection Service, modern scientific research, and the phenolic properties of olive oil — especially high-phenolic varieties — olive oil is safe for deep fat frying — as also reflected in the long-standing practices of the Mediterranean diet.
Although oils that are normally refined like peanut, canola, and sunflower may appear more practical for high-temperature frying due to their higher smoke points (see USDA Food Safety and Inspection Service charts below), such extreme temperatures are generally unnecessary for thorough cooking. Plus, refined oils lack the significant health benefits of non-refined olive oil.
Peanut, canola, and sunflower oils are most often sold in refined forms, a process that increases their stability at higher temperatures and makes them well-suited to deep frying. Unrefined versions do exist, but are less commonly used for this purpose.
Extra virgin olive oil — the highest grade of olive oil, produced without refining — is widely used, valued for its flavor and its naturally occurring compounds. It is extra virgin olive oil that we are referring to throughout the article, at times going a step further to consider higher-quality expressions within this category, such as high-phenolic extra virgin olive oil.
While the refinement process enhances heat stability, allowing these more economical oils to withstand higher temperatures initially, they are more susceptible to oxidation over time. After repeated or prolonged exposure to high heat, refined oils can degrade, forming potentially harmful compounds such as trans fats. This makes them less desirable from a health perspective, especially compared to high-phenolic EVOO, despite their practicality — cost-effectiveness, bland flavor, heat stability — for high-temperature frying.
From the USDA: What kind of oil is recommended? All oils have a "smoke point" at a specific temperature. At the "smoke point," the oil begins to break down and can have a foul odor or taste. The following oils have a high "smoke point" and are recommended to use for deep frying: olive, peanut, canola, corn, grape seed, safflower, sunflower, and vegetable. Each kind of oil has a unique taste and nutrient makeup but all are safe to use for deep-frying.
Quite an endorsement with olive oil being mentioned first. But let’s take a closer look at deep frying with olive oil and more specifically, with high-phenolic extra virgin olive oil which is in a class all its own compared to simple olive oil.
Takeaway
What Exactly is Deep Frying — or More Specifically, Deep Fat Frying?
Deep fat frying: "is a cooking method that can be used to cook foods such as fried chicken, French fries, and potato chips. The process involves submerging a food in extremely hot oil until it reaches a safe minimum internal temperature. When the food is deep-fried properly, it will be hot and crispy on the outside and cooked safely in the center. Deep frying is very fast and, when performed properly, destroys bacteria.”
Takeaway
Deep fat frying is a fast, high-heat cooking method that, when performed properly, produces a crisp exterior while safely cooking food through.
A Short History of Deep Fat Frying
Deep frying of food has a long and winding history that began thousands of years ago. This cooking technique likely originated in the ancient Middle East. In early Mesopotamia, around 2500 BC, people were already using oils and animal fats to cook their food, laying the foundation for what would become deep frying.
However, it was in the Mediterranean, especially among the Greeks and Romans, that the technique took hold in its recognizable form. The ancient Greeks were known for frying small fish in olive oil, an ingredient abundant in the region and crucial to the method. They discovered that this approach produced a delicious, golden crust while sealing in the flavors of the fish — a method still used today.
The Romans, not to be outdone, employed olive oil to fry dough-based treats, which served as precursors to fritters or even modern doughnuts. In both cultures, frying food in olive oil was something special, allowing them to enjoy the richness of flavors that this oil brought to their dishes.
Fast forward to the 20th century, which marked the peak of deep frying, with fast food chains and commercial deep fryers making fried foods accessible to everyone. While deep frying has faced health concerns in recent years, it continues to evolve, as chefs and home cooks alike experiment with healthier oils — returning to the ancient roots of frying by using olive oil—and creative techniques such as air fryers. This evolution preserves deep frying as both a culinary tradition and a tasty way to prepare food.
Takeaway
From ancient kitchens to modern tables, deep frying has endured — with olive oil remaining a trusted part of Mediterranean cooking throughout its history.
How to Deep Fry: Safety First
In the USDA’s words, the key to deep fat frying is that it must be "performed properly."
Deep frying has inherent dangers that must be respected, as my uncle learned the hard way while working at a “fast food joint” to put himself through university in the 1950s. One day, water and extremely hot oil mixed, resulting in a severe scalding that left lasting scars on him — and served as a powerful reminder to our whole family of just how dangerous deep fat frying can be. If you are using a deep frying unit at home please read the instructions found on the USDA site. Deep frying is a delicious way to make food fit for human consumption but it does require care as the oil reaches such high temperatures. And that brings us back to the reason why olive oil is a good option when deep frying.
Takeaway
Deep fat frying is effective, but it demands respect — careful handling and proper technique are essential for both safety and success.
The following charts from the USDA point out the type of oils that can be used and their smoke points, safe minimum internal temperatures needed to cook various foods, and the time needed to do so properly at the correct external temperature.
Type of Oil | Approximate Smoke Point |
Peanut, Safflower, Soybean | 450 °F |
Grapeseed | 445 °F |
Canola | 435 °F |
"Enova" Brand | 420 °F |
Corn, Olive, Sesame Seed, Sunflower | 410 °F |
Safe Minimum Internal Temperatures
Check for these internal temperatures with a thermometer.* | |
Food | Internal Temperature |
Poultry | 165 °F |
Fish and Shellfish | 145 °F |
*But for safety reasons, only check when not frying.
Approximate Cooking Times
Food | Cooking Time | Oil Temperature |
Chicken Pieces | 13 - 20 minutes | 375 °F |
Chicken Fingers | 6 - 8 minutes | 350 °F |
Turkey | 3 to 5 minutes per pound | 375 °F |
Fish Fillets | 3 - 5 minutes | 320 °F |
Shrimp | 4 - 6 minutes | 320 °F |
Deep Fried Chicken
Let's take as an example everybody's favorite Deep Fried Chicken: To ensure the interior of chicken reaches a safe 165°F interior heat during deep frying, the oil typically needs to be heated to somewhere between 325°F and 375°F. This temperature range is key: it allows the meat to cook quickly and evenly, giving it a crisp, golden crust while keeping it from becoming greasy. If the oil drops below 325°F, you run the risk of undercooking the interior and ending up with a soggy coating; go above 375°F, and you’re likely to burn the outside before the inside has had time to reach 165°F.
The ideal temperature for deep frying chicken falls between 325°F and 350°F, a sweet spot that achieves the right balance for perfectly cooked, juicy chicken. Again, this range is important because it allows the chicken to cook evenly: the outer crust develops a golden, crispy finish, while the heat gradually moves inward, cooking the meat all the way through at the safe temperature of 165°F. For larger pieces like drumsticks or bone-in cuts, sticking closer to 325°F is often the better choice. It allows heat to penetrate without over-browning, ensuring that the chicken stays moist inside, with every bite just as flavorful as it should be.
Keeping an eye on the oil temperature with a thermometer and double-checking the internal temperature of the meat is the best way to ensure that each piece is cooked perfectly—safe, flavorful, and just right.
Note: “Do not test the internal temperature of the food while it is submerged in the hot oil; this will lead to an inaccurate temperature reading” plus it is dangerous.
Takeaway
The key to deep frying is temperature control — staying within the proper range ensures food cooks evenly, safely, and with a crisp, golden finish.
Health Considerations When Deep Frying
Health concerns related to deep frying include the formation of harmful compounds, such as trans fats, and the use of oils that can oxidize and create free radicals. To mitigate these concerns, cooks can use high-phenolic extra virgin olive oil, maintain proper frying temperatures to reduce cooking time, and limit the reuse of frying oils.
While high-phenolic extra virgin olive oil is a good choice for deep fat frying, it’s important to remember that a diet high in fried foods isn’t the healthiest, regardless of the oil used. Regularly consuming fried foods has been associated with a range of health concerns, including weight gain, increased cholesterol, high blood pressure, a higher risk of heart disease and an increased risk of certain cancers. The best approach is balance: enjoying fried foods occasionally can be part of a healthy diet, but prioritizing other cooking methods—like baking, steaming, boiling, etc.—supports overall health.
Takeaway
The Bottom Line: Is Olive Oil Safe for Deep Fat Frying?
As shown above in the official charts from the USDA, the typical temperatures for deep frying fall below the smoke point of regular olive oil. Even if this smoke point is approached — something that should not happen if the food is to be cooked perfectly — the high phenolic content in unrefined EVOO helps protect both the oil and the food being cooked by reducing oxidation and breakdown. This makes high-phenolic EVOO, even more than just regular extra virgin olive oil, a safe and healthy choice for deep frying when used within its temperature range.
Takeaway
When used within proper temperature ranges, extra virgin olive oil — especially high-phenolic — provides a safe, stable, and health-conscious choice for deep frying.
Where Modern Science Meets Mediterranean Tradition
Once again, modern science is confirming what the Mediterranean way of eating has long demonstrated — that olive oil, at the heart of this tradition, not only enhances food, but helps protect it during cooking, and in turn, those who enjoy it.
So we may return to the question: Is olive oil safe for deep frying?
The answer remains clear: According to the USDA Food Safety and Inspection Service, modern scientific research, and the long-standing practices of the Mediterranean diet, olive oil is indeed safe for deep frying — when used with proper care.
For those seeking an added measure of stability and benefit, high-phenolic extra virgin olive oil offers a thoughtful option. Its naturally occurring compounds provide greater antioxidant protection, helping the oil maintain its integrity during cooking — even as temperatures rise.
That said, with well-managed heat and sound cooking practices, there is rarely a need to approach the upper limits of the oil. As with all methods of cooking, balance remains key. Deep frying can be enjoyed, but is best used alongside other approaches, rather than as a daily routine.
If you’re wondering about a lighter approach — such as cooking with olive oil at lower heat — you may also enjoy: Is Olive Oil Safe for Sautéing? | PJ Kabos Guide — Part XIV.
Takeaway
Modern science and Mediterranean tradition agree — olive oil can be used safely for deep frying when handled with care, with high-phenolic varieties offering an added measure of stability and balance.
Frequently Asked Questions
IS EXTRA VIRGIN OLIVE OIL SAFE FOR DEEP FRYING?
Yes — when used within proper temperature ranges, extra virgin olive oil is safe for deep frying. Its natural antioxidant compounds, including phenols, help maintain stability during cooking and protect both the oil and the food.
DOES OLIVE OIL HAVE A HIGH ENOUGH SMOKE POINT FOR DEEP FRYING?
Yes — the smoke point of olive oil typically falls around 375–410°F (190–210°C), depending on the quality and composition of the oil. This range overlaps well with common deep frying temperatures, which are usually between 320–375°F (160–190°C). When used properly, olive oil performs reliably within these cooking conditions.
IS HIGH-PHENOLIC OLIVE OIL BETTER FOR FRYING?
High-phenolic extra virgin olive oil contains greater levels of natural antioxidants, which can help protect the oil from oxidation during heating. This added stability may help the oil maintain its integrity longer, making it a particularly good choice for cooking at higher temperatures.
IS HIGH-PHENOLIC OLIVE OIL GOOD FOR YOU?
Yes — high-phenolic extra virgin olive oil contains higher levels of natural antioxidants that help protect the body from oxidative stress and support overall health. When enjoyed raw, it can be a particularly beneficial addition to the diet, especially within a balanced Mediterranean pattern of eating.
Experience High-Phenolic Extra Virgin Olive Oils from PJ Kabos
The Most Recent Harvest (2025–26)
Please note: Phenolic levels and profiles vary with each harvest.
Extremely High-Phenolic Organic Extra Virgin Olive Oil
Phenols: 995 mg/kg (HPLC), at production
Hydroxytyrosol (& derivatives): 14+ mg/20 g (far above the EU health claim threshold)
USDA Organic
Kosher
Primary Use: Daily Phenolic Shot
Secondary Use: Finishing, Vinaigrettes
Taste Intensity: Robust +
Very High-Phenolic Organic Extra Virgin Olive Oil
Phenols: 699 mg/kg (HPLC), at production
Hydroxytyrosol (& derivatives): 10+ mg/20 g (well above the EU health claim threshold)
USDA Organic
Kosher
Primary Use: Daily Phenolic Shot, Finishing
Secondary Use: Baking, Cooking
Taste Intensity: Robust
High-Phenolic Organic Extra Virgin Olive Oil
Phenols: 400+ mg/kg (HPLC), at production
Hydroxytyrosol (& derivatives): 7+ mg/20 g (more than meets the EU health claim threshold)
USDA Organic
Kosher
Primary Use: Finishing & Cooking
Secondary Use: Daily Phenolic Shot
Taste Intensity: Medium
High-Phenolic Extra Virgin Olive Oil
Phenols: 400+ mg/kg (HPLC), at production
Hydroxytyrosol (& derivatives): 5+ mg/20 g (meets the EU health claim threshold)
No Pesticides
Kosher
Primary Use: Finishing & Cooking
Secondary Use: Daily Phenolic Shot
Taste Intensity: Medium
Extra Virgin Olive Oil
Phenols 250-300 mg/kg (HPLC), at production
Hydroxytyrosol (& derivatives): 3+ mg/20 g (below the EU health claim threshold; still an excellent EVOO)
No Pesticides
Kosher
Primary Use: Cooking, Baking
Secondary Use: Finishing
Taste Intensity: Delicate
Contents
PJ Kabos Guide to Olive Oil
Where ancient olive-growing wisdom meets modern science, your guide to choosing, tasting, and enjoying exceptional high-phenolic extra virgin olive oil. We hope it inspires you in your olive-oil journey.
How olive oil quality is defined — and why the difference matters for taste, health, and daily use.
Why extra virgin and high-phenolic olive oils shine in real-life cooking, from sautéing to roasting.
Your simple daily ritual for harnessing the powerful antioxidants in high-phenolic olive oil.
How phenolic compounds support heart, brain, metabolic, joint, and whole-body vitality across the years.
How cholesterol works — and how extra virgin olive oil supports balance and heart health.
A simple guide to the phenolic compounds in olive oil — what phenols and polyphenols are and why they contribute to olive oil’s flavor, stability, and potential health benefits.
VII. What Is a Daily Phenolic Shot of Olive Oil and What Is the EU “Health Claim” Concerning It? | PJ Kabos Guide
How phenolic content varies from oil to oil and from harvest to harvest — and how to choose an olive oil that meets the EU Health Claim.
A clear look at whether extra virgin olive oil contains heavy metals, microbes, or allergens — and how its natural composition, along with laboratory testing, helps us understand what is — and is not — present.
A clear introduction to tasting notes and flavor in extra virgin olive oil — exploring how these natural characteristics arise from the olive, and how bitterness and pungency shape the oil’s character and overall tasting experience.
A thoughtful exploration of aroma and appearance in extra virgin olive oil — how scent prepares the palate, how visual cues can mislead, and how these first impressions shape the tasting experience.
Subscribe and stay tuned — more chapters coming soon.
Please enjoy having a look around our websites and PJ Kabos Amazon Store for more about our many high-phenolic olive oils, recipes, history, etc.
And follow along with us on Instagram for photos concerning olive oil production, our groves in Greece, articles about olive oil, family history and more.
For Those Who Love to Dig Deeper:
USDA Food Safety and Inspection Service U.S. Department of Agriculture. Deep Fat Frying and Food Safety.
Cooking with Extra-Virgin Olive Oil: A mixture of food components to prevent oxidation and degradation. Trends in Food Science and Technology, Volume 123, May 2022, Pages 28-36.
Please note: This article is for informational purposes only and should not be considered medical advice. Consult a healthcare professional for personalized guidance regarding your health and medical conditions.
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