Seasoning a cast-iron pan: the honest, small version

Cast iron's mystique is oversold; its chemistry is not. Seasoning is just oil baked onto the metal until it polymerises into a hard, slick, rust-blocking layer. It is not a fragile butterfly — it is plastic, essentially — and it repairs in minutes, which is why generations of cooks kept one pan for a lifetime.

The routine, small and honest

Start clean and dry: scrub off any rust with steel wool or a scouring pad (rust is a repair, not a funeral), wash with washing-up liquid like a normal object — the "never use soap" myth predates modern mild detergents and can retire. Dry the pan on the heat. Rub a thin, almost stingy film of a neutral high-smoke-point oil over every surface, then wipe it with a paper towel as if you changed your mind — the layer should look nearly dry. Heat the pan (oven, upside down, or stovetop on medium) until it passes through smoky and settles past it, then cool. That is one round; three rounds build a cooking surface. Every sauté that follows adds another invisible coat — this is why daily use is the real seasoning programme.

The two things that undo it

Soaking — water is cast iron's only real enemy, and a pan left in the sink overnight arrives at morning rusty (the rescue is the steel-wool step above, not regret). And dishwasher cycles, which strip months of polymer in an hour. Sticky, patchy surfaces mean too much oil per round — strip back with hot water and a scrub, and restart thinner. That is the entire art. For the wider keep-things-working philosophy, the desk's toolkit checklist and repair-fund rule apply to cookware too: maintain the good one, and it outlives three non-stick replacements.