What each level is for
Describing what you should observe rather than a dial position, because dials are not comparable.
- Low
- Barely any sizzle. For melting, sweating onions without colour, gentle simmering, custards, and anything with dairy or egg in it.
- Medium-low
- A faint, occasional sizzle. Softening aromatics, gentle frying, reducing slowly, caramelising onions.
- Medium
- A steady sizzle. Most everyday frying, eggs, pancakes, and anything you want cooked through with some colour.
- Medium-high
- An assertive sizzle, oil shimmering. Sautéing, browning meat, shallow frying. The most-used setting for browning.
- High
- Loud, oil close to smoking. Searing, stir-frying, boiling water, reducing fast. Rarely right for more than a couple of minutes.
- The rule most recipes get wrong
- Domestic hobs vary by a factor of several. Adjust to the sizzle, not the number.
Reading the pan
These are the tests worth learning, and they are more reliable than any dial.
- The water test. Flick a few drops into a dry pan. If they sit and bubble slowly, it is not hot enough for searing. If they skitter across the surface as beads, it is ready.
- The oil test. Cold oil is thick and sits still. Hot oil is thin, moves easily, and shimmers. Smoking oil is too hot for most purposes.
- Listen. A quiet pan is not browning. A furious one is on the edge of burning. A steady, confident sizzle is right for most cooking.
- Watch the edges. Food colouring at the edge and not the middle means the pan has a hot ring — usually a pan too large for the burner.
- Smell. Nutty and toasty is good. Acrid and sharp means something is burning, and it is usually garlic or spice.
Why your hob matters
Gas responds instantly and heats the pan in a ring where the flame touches, so a thin pan gets a hot circle and a cool centre. Turning it down works immediately.
Electric radiant is slow to change. Turning it down does nothing for a minute or two, so the practical move is to lift the pan off rather than adjust the dial.
Induction is the most responsive of all and heats the pan directly rather than the air around it — so an induction pan of the same setting is often hotter than you expect and it changes the moment you move the dial.
Pan weight matters as much as the hob. A heavy pan holds temperature when cold food goes in; a thin one collapses and everything steams.
None of this makes a recipe wrong. It means the instruction "medium-high" describes a result — a certain sizzle — that you reach by different dial positions on different equipment.
When to change the heat
- Turn it down when things brown too fast at the edges but the middle is not cooking.
- Turn it down when the pan smokes rather than shimmers.
- Turn it up when the pan goes quiet after cold food goes in. This is the commonest correction and almost nobody makes it.
- Take the pan off the heat entirely for delicate steps: adding garlic, adding paprika, finishing with butter, adding cheese.
- Move to a smaller burner for a long simmer, rather than fighting a large ring at its lowest setting.
- Use the oven for anything that has to hold a steady low temperature for hours. It does it better than any hob.
Common questions
My hob will not simmer gently enough. What can I do?
A smaller ring, a heat diffuser, the lid partly on, or move the whole pot to a low oven — which is the most reliable answer.
Should I preheat the pan empty?
For stainless and cast iron, yes. Never for non-stick, which should not be heated empty.
Why does everything brown in the middle only?
A pan larger than the burner. Use a pan that matches the ring, or a heavier pan that spreads the heat.
How hot is "smoking hot"?
Hotter than you usually want. Shimmering is the target for almost everything except a hard sear.
Try this next
- Sautéing where reading heat matters most
- Simmering and how to recognise one
- Frying pan and why weight decides stability