Your butter blackens before the meat is even down. Your olive oil smokes and the flat smells burnt. You've read somewhere that olive oil should never be heated, and somewhere else that it's fine. One idea sorts all of it out.
The smoke point, in three lines
Every fat has a temperature at which it starts to break down visibly: it smokes, its taste turns acrid, and it goes tacky as it cools.
It isn't a switch, it's a gradual threshold. A little above it, you lose flavour. Far above it for a long time, it becomes unpleasant and it gums up the pan.
And that threshold depends mostly on refining: it's the residues — particles, water, aromatic compounds — that burn first. A refined oil is neutral in taste and takes heat. A virgin oil has flavour and takes less.
The table
| Fat | Indicative smoke point | What for |
|---|---|---|
| Butter | ~150 °C | Gentle cooking, eggs, finishing to coat |
| Extra virgin olive oil | ~190–200 °C | Medium heat, vegetables, raw finishing |
| Clarified butter (ghee) | ~250 °C | Searing with a butter flavour |
| Refined rapeseed oil | ~230 °C | Searing, neutral everyday use |
| Refined sunflower oil | ~230 °C | Searing, deep frying |
| Peanut oil | ~230 °C | Deep frying, wok |
| Refined avocado oil | ~250 °C | Very high-heat searing |
| Walnut, flaxseed, toasted sesame | Low | Raw only, never for cooking |
Values vary by brand, harvest and refining. Treat them as orders of magnitude, not constants.
What that means in practice
For searing meat
You want a neutral oil with a high smoke point: rapeseed, sunflower, peanut, grapeseed. The pan is around 200 °C — butter wouldn't survive it.
The classic move: sear in neutral oil, then add a knob of butter in the last minute, once you've turned the heat down. You get the crust and the butter flavour, without the black.
For eggs and gentle cooking
Butter, and nothing else. Medium heat, no more. It should foam without browning: that's the water in it evaporating. When the foam settles, that's when the egg goes in.
For vegetables
Olive oil is fine on medium-high. The idea that it must never be heated is a simplification: its smoke point is well above normal cooking. What is true is that an expensive olive oil loses its aromas to heat. Keep the good one for finishing raw.
For deep frying
A refined oil with a high smoke point — and above all, don't reuse it indefinitely. Every heating lowers its smoke point. Oil that smokes earlier than it used to, that has darkened, or that smells rancid has done its time.
The four rules that avoid 90% of the problems
- Pan first, fat second. The most important rule and the least applied. Oil poured into a cold pan heats through the whole climb to temperature: it has time to degrade before you've even started cooking. Heat the pan empty, use the water drop test, then pour.
- Just enough. A thin film covering the base. The excess pools at the edges, never cooks, and ends up as sticky brown patches.
- If it smokes before the food goes in, start again. Tip it out, wipe, fresh oil. Thirty seconds lost beats a bitter dish.
- Butter at the end, not the beginning. True for almost every meat cook.
And the oil that sticks to the base?
Oil heated too long, too hot, in too thick a layer polymerises: it forms a hard, tacky film that really does grip. It's also what happens when you try to season a stainless pan. It comes off with simmered baking soda.
What changes with a stainless pan
This whole table assumes you can actually get up to temperature. A tired non-stick doesn't allow it: high heat damages the coating, so you cook below the threshold where searing happens — and at that point, the choice of oil hardly matters.
On bare stainless there's nothing to protect. Ours is here, 304 stainless with no coating, with the 25-recipe book free.
