Smoke point is the temperature at which an oil or fat begins to visibly smoke. When fat smokes, it's not just an aesthetic problem — it means the fat is breaking down: triglycerides decompose, free fatty acids form, and aldehydes and acrolein are released. These are compounds you don't want in your food.
Understanding smoke points helps you choose the right fat for the right method.
The Numbers
| Fat | Smoke Point | Notes | |-----|-------------|-------| | Ghee (clarified butter) | ~250°C | Very high; milk solids removed in clarification | | Refined coconut oil | ~232°C | Heat-stable; neutralised by refining | | Cold-pressed coconut oil | ~177°C | Lower; natural compounds still present | | Groundnut (peanut) oil | ~160°C (cold-pressed) / ~232°C (refined) | Significant difference between refined and unrefined | | Sesame oil (light) | ~177°C | Fine for medium-heat cooking and finishing | | Cold-pressed mustard oil | ~149°C | Low smoke point; traditionally used for brief high-heat in Indian cooking | | Butter (unclarified) | ~163°C | Milk solids burn; limited to low-medium heat | | Extra virgin olive oil | ~190°C | Suitable for medium heat despite the myth otherwise |
Why Ghee Is the Standout
Ghee's exceptional smoke point comes from clarification. By removing the milk solids and water from butter, the components that burn at lower temperatures are gone. What remains is almost pure butterfat, which is very stable at high heat.
This makes ghee the traditional Indian choice for high-heat cooking: tadkas, deep frying, searing. It also has the most concentrated flavour of any dairy fat, so a smaller quantity does more work.
Cold-Pressed Oils and Heat
The trade-off with cold-pressed oils is well-understood: they retain more nutrients and flavour compounds precisely because they weren't heated during extraction. Those same compounds are heat-sensitive in cooking too.
For high-heat applications — deep frying, prolonged sautéing — cold-pressed oils aren't ideal. Their lower smoke points mean they degrade faster and can impart off-flavours.
For medium-heat cooking (tempering, stir-frying, light sautéing), cold-pressed groundnut, coconut, and sesame oils work well.
For no-heat or low-heat use — dressings, finishing, drizzling — cold-pressed oils are at their best. Their flavour is preserved and no smoke point concerns arise.
Reheating and Repeated Use
Smoke point drops with each heating cycle. An oil that smokes at 175°C on first use will smoke at a lower temperature after being heated and cooled once. This is why oil reused for frying produces off-flavours.
Ghee is significantly more stable to repeated heating than most vegetable oils because of its saturated fat profile, which resists oxidation better than polyunsaturated fats.
Practical Application
- Tadka / tempering: Ghee is traditional and appropriate. High smoke point handles the brief high heat.
- Roasting at 200°C+: Ghee or refined coconut oil. Cold-pressed oils will struggle.
- Stir-frying: Cold-pressed groundnut or sesame oil (not too high, work quickly).
- Finishing a dish: Any cold-pressed oil. Add after the heat is off.
- Dressings and dips: Cold-pressed oils exclusively. Their flavour is the point.
