Smoke Point
The temperature at which a fat begins to break down, smoke, and release bitter compounds and harmful free radicals.
Butter smoke point: 350°F (177°C) • Canola oil: 400°F (204°C) • Avocado oil: 520°F (271°C)
The smoke point of a fat is the temperature threshold at which the oil begins to decompose, emitting a visible blue smoke. When an oil is heated past its smoke point, the triglycerides break down into glycerol and free fatty acids, producing acrolein, a volatile compound that causes eye irritation and a bitter, burnt taste in food. Heating fat beyond its smoke point also destroys beneficial antioxidants and forms harmful free radicals and trans fats, compromising both flavor and nutritional value. The smoke point varies widely depending on how refined the oil is: unrefined oils contain free fatty acids and plant matter that burn quickly, while highly refined oils have these impurities removed, allowing them to withstand higher heat.
In cooking, matching the smoke point of your oil to your cooking technique is critical. For high-heat methods like deep-frying, searing, or stir-frying, oils with high smoke points (above 400°F / 200°C) must be used. For low-heat cooking or cold finishes, oils with low smoke points (like extra virgin olive oil) are preferred for their flavor profiles.
Using extra virgin olive oil for high-heat pan searing. The olive oil burns instantly, filling the kitchen with acrid smoke and coating the food in a bitter, soot-like taste.
Smoke points can vary slightly by brand depending on filtration methods. Always refer to general charts as approximations rather than absolute numbers.
Refer to smoke points when selecting oils for deep-frying (high smoke point) vs drizzling over finished dishes (low smoke point).
Store cooking oils in a cool, dark place away from the stove. Heat and light accelerate oxidation, lowering the oil's smoke point over time.