Cast iron vs nonstick: which should you choose?

Cast iron and nonstick are not competing versions of the same pan. One is heavy bare metal that holds heat and takes any temperature you can give it, and the other is a light aluminum pan with an applied coating that releases food brilliantly and has a temperature ceiling and a service life. The honest answer is that most kitchens want one of each, and the useful question is which one should be your default pan. Our Best Cast Iron Skillets for Searing, Baking and Frying and our Best Nonstick Frying Pans each compare the published figures of five of them.

Weight is the difference you feel first

This is the specification that decides how often a pan actually gets used, and it is the one makers publish most consistently. Lodge publishes a weight of 5.35 lb for one of the skillets in our cast iron guide. Nonstick pans in the same diameter are published at a fraction of that: the lighter pans in our nonstick guide are listed at 1.1 lb and 1.4 lb. A pan at 5.35 lb cannot be flipped with a wrist movement, cannot be lifted off the heat one-handed while you are doing something else, and will not be taken out for one egg.

That weight is also where cast iron’s advantage comes from. Thick iron stores a lot of heat, so when cold steak hits the surface the pan temperature barely drops and you get a crust. A thin pan loses its heat to the food instantly and the same steak steams in its own juice. If you are choosing a pan for searing, weight is the feature and not the drawback.

What each surface actually does

Nonstick releases food because of the coating, from the first use, with no technique required. That is genuinely hard to beat for eggs, pancakes, crepes, delicate fish and anything you want to slide out intact. Cast iron releases food because of seasoning, which is polymerized oil bonded to the iron, and it gets better with months of cooking rather than worse. A well-used iron pan does eggs perfectly well. A new one does not, and nobody should pretend otherwise.

The trade runs the other way on heat. Nonstick coatings have a maximum temperature and degrade above it, which rules out an empty pan preheated hard, a long oven roast, a broiler finish, and the sort of smoking-hot sear that gets a crust. Cast iron has no such limit. It goes on a grill, in an oven at any setting, under a broiler and onto a campfire. It is also the only one of the two you can use to bake cornbread or a deep dish pizza.

Service life

A nonstick pan is a consumable. Used carefully it lasts a few years, and then the coating wears, food starts catching and the pan gets replaced. Nothing you can do restores it. Cast iron does not wear out: the surface is the metal, and the layer on it can be stripped and rebuilt any number of times, which is why second-hand iron pans from decades ago are still in use. If a nonstick pan loses its coating it is finished, and if an iron pan rusts solid it is a scrubbing job.

That difference changes how you should treat each one. Nonstick wants a plastic or wooden spatula, no metal, no high empty preheat, hand washing, and no stacking without a liner. Cast iron wants metal utensils if you like, heat drying after washing, and a wipe of oil before it goes away. Each pan’s care routine is roughly the other’s list of things to avoid.

Where stainless fits

Stainless steel is the third option people end up wanting once they own both, because it does the one job neither does well: acidic cooking. Long tomato braises, wine reductions and citrus sauces strip seasoning off iron and are hard on a coating, while stainless is chemically inert and takes any of it. It also handles high heat like iron while weighing much less, at the cost of needing technique to stop food sticking. Our Best Stainless Steel Frying Pans compares the published figures of five of them.

Which should be your default

Choose nonstick as the main pan if most of what you cook is eggs, fish, pancakes or quick vegetables, if lifting a heavy pan is a problem, or if you want a pan that works perfectly on day one with no learning and no upkeep. Accept that you are buying something that will need replacing.

Choose cast iron as the main pan if you sear meat, finish dishes in the oven, bake in a pan, cook outdoors, or simply want one pan that will outlast the kitchen. Accept the weight, the drying routine and the fact that it is unimpressive for the first month.

If you are buying just one and you genuinely do not know, a nonstick pan is the lower risk choice, because it has no technique to learn and no way to get it wrong. Cast iron is the better pan and the one that asks something of you first. And if you can have two, a 12 inch iron skillet and a 10 inch nonstick pan cover almost everything a home kitchen does, with each one handling exactly what the other is bad at.