Frying right: which oil takes the heat
When frying it is not taste that decides, but heat stability. We explain smoke point and fatty acids , so nothing burns or turns.
The rulesWhen the oil starts to smoke
Every oil has a temperature at which it visibly smokes. Then it breaks down, the taste turns bitter and unfavourable substances form. For searing and deep-frying you therefore need an oil with a high smoke point.
Rule of thumb: the more polyunsaturated fatty acids an oil contains, the more sensitive it is. Refined oils take more heat than natural ones.
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Which oil for which heat
- Hot frying & deep-frying: refined high-oleic oil, coconut oil, clarified butter, refined rapeseed oil. High smoke point, stable.
- Medium heat, gentle sauteing: olive oil (even virgin takes more than often claimed).
- Never hot: flaxseed, hemp, walnut oil. These belong exclusively cold on the food.
Practical: oil into the hot pan, don’t preheat endlessly, and once it smokes it is too hot , discard and start again.
Said honestly
Expensive does not mean heat-proof. A fine virgin flaxseed oil is healthy but unsuitable for frying, while a cheap refined high-oleic oil survives the pan without complaint. What matters is choosing the oil for the use, not the price. We give you the facts, the decision stays with you.
Sources and further reading
- Smoke point , Wikipedia