Seasoning sounds like folklore, but it's just chemistry: oil heated past its smoking point bonds to the iron and hardens into a slick, protective layer called polymerised oil. Every black, glossy, beautifully non-stick cast iron pan you've ever envied is wearing hundreds of these microscopic layers. Here's how to build them on purpose.
When you actually need to season
Less often than the internet insists. Our Pyrocast and Ignite pans arrive pre-seasoned and ready to cook, and the oil-wipe after each clean (see our cleaning guide) maintains the surface by itself. Do a full oven season only when: the pan arrives bare, food starts sticking where it didn't before, the surface looks grey or dull, or you've just scrubbed off rust.
Which oil
Any neutral oil with a high smoke point: rice bran, canola and grapeseed all work well and are cheap at any NZ supermarket. Skip olive oil and butter for seasoning; their smoke points are too low and they turn sticky rather than hard. There's a cult of exotic seasoning oils out there. Ignore it. The technique matters, the brand of canola doesn't.
The oven method, step by step
- Scrub the pan clean and dry it completely on a low element.
- Oil it everywhere, including the outside and handle, then, and this is the step everyone gets wrong, wipe it almost all off. The pan should look barely damp, not glossy. Too much oil bakes into sticky patches instead of hard seasoning.
- Bake upside down at 230°C for one hour, with foil or a tray on the rack below to catch any drips. Upside down stops pooling.
- Turn the oven off and let the pan cool inside it. Slow cooling helps the layer cure hard.
- Repeat two or three times for a bare or freshly de-rusted pan. One coat is enough for a refresh.
Expect some smoke around the smoke point; run the extractor and don't panic. That smell is the seasoning forming.
The once-a-season ritual
A practical rhythm for NZ kitchens: give your workhorse pan one oven season at the start of winter, when it's about to earn its keep, and let daily cooking and the post-wash oil wipe do the rest of the year. Cooking fatty things helps too. Bacon is maintenance. Tell your household it's maintenance.
What seasoning is not
It's not flavour from old meals (that would be poor cleaning), it's not a factory coating that wears out permanently, and it's not fragile. You cannot ruin a cast iron pan through seasoning mistakes. Worst case, you scrub back to iron and start again, which is exactly how a $21.95 skillet becomes the pan your grandchildren argue over.
