The Empty Pan on a High Flame

Preheating a pan is correct technique. Preheating an empty coated pan on full heat is the single most common way people damage cookware and create a real hazard.

How Fast It Happens

An empty pan has nothing to absorb the energy going into it, so its temperature climbs extremely quickly.

On a powerful burner an empty pan can pass the point at which coatings begin to degrade within a couple of minutes, and it will keep climbing as long as the heat is on.

Food or fat in the pan changes this completely, because water in food holds the surface near its own boiling point until it has evaporated.

The Right Way to Preheat

Medium heat, and a short time. Coated pans do not need or want a long high preheat.

Add a little oil at the start, which gives you something to watch and something to absorb heat. Oil shimmering is the signal; oil smoking means it is too hot.

Manufacturers whose guidance is built around medium heat rather than maximum, of the kind at cooker-king.net, are describing the condition their surfaces are designed for.

What Overheating Causes

• Coatings degrade and begin to release fumes
• Those fumes cause temporary flu-like symptoms in people
• They are lethal to pet birds, whose airways are exceptionally sensitive
• The coating itself is permanently damaged and will not recover
• Handles, rivets and any plastic components suffer
• The base can warp from uneven expansion

The bird point is not a technicality. Deaths of pet birds from overheated nonstick cookware are well documented, and anyone keeping birds should keep them out of the kitchen entirely while cooking.

Bare Stainless Is Different

Uncoated steel, cast iron and carbon steel can be preheated dry, and stainless in particular needs it to release food properly.

The rule applies to anything with a coating.

Never Under a Grill

A grill applies intense radiant heat directly to the cooking surface, which is the worst case for any coating.

Check the manufacturer’s oven temperature limit and treat grilling as a separate question.

Ventilate While Cooking

An extractor or an open window, particularly at high heat and particularly when searing.

Do Not Walk Away

Most overheated pans are pans somebody forgot about.

Retire a Damaged One

A blistered, flaking or discoloured coating is finished.

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