How to season a carbon steel pan

What you are actually doing

Seasoning is polymerization. You heat a very thin film of fat past its smoke point, and the fat molecules cross-link into a hard, slick, plastic-like layer that bonds chemically to the steel. It is not a coating applied at a factory and it is not oil sitting on the surface.

The consequences are worth understanding because they explain every rule below. A bonded polymer is not removed by dish soap. It is broken down by acid. And it needs a clean, dry, bare metal surface to bond to in the first place — which is why the beeswax has to go completely.

Step 1: remove the beeswax

Most French carbon steel pans ship coated in beeswax to stop them rusting in transit. de Buyer's published instruction is to "wash the pan thoroughly with hot water and a scrub brush or sponge to remove all beeswax — no soap needed."

Use water as hot as you can stand and scrub properly. The wax is not obvious once wet, so go over the whole pan including the sides and under the rim, and take longer than feels necessary. Any wax left behind will stop the seasoning bonding in that spot and you will get a patchy result.

Lodge's carbon steel arrives pre-seasoned, so this step does not apply. Matfer's black steel pans are bare rather than waxed — wash and dry, then go straight to seasoning.

Step 2: dry it completely, on the heat

This is not a formality. Bare stripped steel flash-rusts within minutes of being wet, and you will watch it happen. Put the pan straight on the burner over medium and leave it until every trace of water has gone and the surface looks dull and dry.

If you see faint orange bloom, wipe it away with a paper towel while the pan is warm and carry on. It is superficial at this stage.

Step 3: the oil, and how little of it

de Buyer names grapeseed or avocado — high smoke point oils, which matter because you need to get past the smoke point to polymerize, and a low smoke point oil will fill the kitchen with smoke long before it does anything useful.

Use almost none. Pour in a few drops, spread them over the whole interior with a paper towel, then wipe the pan as though you were trying to remove the oil entirely. What stays in the metal's texture is the correct amount.

Too much oil is the single most common failure. A thick layer cures on the outside while staying liquid underneath, producing a sticky, patchy finish that peels — which people then try to fix with more oil.

Step 4: heat until it just smokes

de Buyer's instruction: "heat until the oil begins to smoke lightly, then let it cool."

Note the word lightly. You want a thin wisp, held for a minute or so — not a rolling cloud. Medium-high heat on the hob, tilting the pan to bring the sides into contact with the burner as well. Open a window; there will be some smoke and there is no way around that.

Let the pan cool until you can touch it, then repeat. Two or three rounds gives you a working base. The pan will go from silver to bronze to brown, and eventually to near-black with use. That progression is the point.

The oven alternative

If your kitchen extraction is poor or the pan has an oven-safe handle, the oven method is gentler and more even. It is Lodge's published method for cast iron and it works identically on carbon steel: oil the pan thinly, place it upside down on the center rack with foil below, bake at 450-500F for one hour, and let it cool in the oven.

It takes longer and produces a more uniform result, particularly on the sides. Check that your handle can take the temperature first — de Buyer publishes no oven maximum for the MINERAL B PRO, and its handle is cast stainless with a Heat Stop.

The first few cooks matter

Seasoning built in the oven or on the hob is thin and fragile. The first few things you cook in the pan will either strengthen it or damage it.

• Do cook: bacon, sausages, potatoes, mushrooms, anything fatty. Fat plus heat is exactly how the layer thickens.
• Do not cook: tomato, wine, vinegar, lemon, or anything you plan to deglaze. Acid strips a young seasoning layer immediately.
• Do not boil water in it for the first few weeks.
• Do not scrub it hard. Hot water and a brush is enough; save the aggressive cleaning for a pan with a mature layer.

The daily routine, which is the actual commitment

1. Cook. Get the pan hot before food goes in.
2. While it is warm, rinse with hot water and use a brush or scraper for stuck bits. Soap is fine on a mature layer; skip it while the seasoning is young.
3. Dry on the burner. Not a towel, not a rack. Back on the heat until bone dry.
4. Wipe a trace of oil around the warm interior. A few drops on a paper towel.
5. Store uncovered and dry.

A minute, maybe less. That is the entire ongoing cost of owning carbon steel, and whether it sounds trivial or intolerable is the honest test of whether the material suits you — see is carbon steel worth it.

When it goes wrong

Nothing on this list is permanent. Carbon steel can be taken back to bare metal and started again as many times as you like, which is a genuine advantage over any coated pan and the reason these pans last generations in professional kitchens.