How to Season and Care for Cast Iron, Carbon Steel and Wooden Cutting Boards

Last updated: September 16, 2026

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The short version

For cast iron and carbon steel: wash, dry, oil. A little dish soap is fine, water left sitting is not, and the pan should go back on the burner until it is bone dry before a few drops of oil get wiped across it. Seasoning is not a coating you can wreck with one wash. It is oil that has been baked hard onto the metal, and it builds every time you cook with fat.

For a wooden cutting board: wash, stand it up to dry, oil it when it looks thirsty. Never soak it and never put it in the dishwasher. Enameled cast iron is the odd one out: it needs no seasoning at all, only gentle cleaning and patience with temperature changes.

What seasoning on cast iron and carbon steel actually is

Bare iron and carbon steel rust quickly and food welds itself to them. Seasoning fixes both problems. When a thin film of oil is heated past its smoke point on the metal, the fat molecules link together into a hard, slick polymer that bonds to the surface. Lodge, which has made cast iron since 1896, describes it simply: seasoning is oil baked onto the pan through polymerization.

Two things follow from that. First, seasoning is built in many very thin layers, never one thick one. A heavy coat of oil does not polymerize all the way through, and what you get instead is a sticky, gummy surface. Second, every time you cook with fat at a decent temperature, you add a little more. A pan that gets used gets better, and a pan that sits in a cabinet with a factory coating is not really seasoned yet.

That is also why the dark color is not the point. A new carbon steel pan will go blotchy, bronze, brown and black in patches over its first weeks. That uneven look is seasoning forming where the heat and oil landed, and it evens out with use.

How to season a cast iron or carbon steel pan in the oven

You only need a full oven seasoning for a new bare pan, a pan you have stripped back after rust, or one whose surface has gone patchy and dull. A pre-seasoned pan can go straight to the stove.

1. Wash it with warm soapy water to remove any factory oil, wax or residue, then rinse.
2. Dry it completely with a towel, then set it over medium heat for a few minutes until every trace of moisture is gone.
3. Rub on a small amount of oil everywhere, inside, outside and the handle, then wipe it all off again with a clean cloth as if you had used too much. What remains should look almost dry.
4. Bake it upside down on the middle rack at 450 to 500°F for one hour, with foil on the rack below to catch drips. Upside down stops oil from pooling in the pan.
5. Let it cool in the oven with the door closed.
6. Repeat two or three times for a bare or stripped pan. A pan that only needs a refresh usually needs one round.

Those temperatures and the upside-down, foil-below method are Lodge’s own instructions for re-seasoning cast iron, and the same process works for carbon steel.

Which oil to use for seasoning

Any cooking oil with a high smoke point will season a pan. Lodge recommends vegetable oil, canola oil or melted shortening, and those are cheap, neutral and forgiving. Grapeseed and sunflower work the same way.

Flaxseed oil has a devoted following because it cures into a very hard, glassy finish, but many cooks find that finish brittle and prone to flaking over time, and it is expensive. Olive oil and butter are poor choices for oven seasoning because they smoke and burn at lower temperatures, though both are perfectly fine to cook with once a pan is seasoned.

The oil matters far less than the amount. Nearly every seasoning problem, sticky, blotchy or flaking, comes from too much oil at once rather than the wrong kind.

What to cook first in a newly seasoned pan

The first few weeks decide how fast a pan becomes truly non-stick. Every time fat heats on the surface you are laying down more seasoning, so the best early meals are the ones that use plenty of it.

• Good first cooks: bacon, pan-fried potatoes, shallow-fried chicken, seared steak, roasted vegetables tossed in oil, cornbread baked in a well-greased skillet.
• Save for later: eggs, delicate fish and crepes, which stick to young seasoning, and long tomato or wine simmers, which can wear it back down.
• Preheat properly. Most sticking on a seasoned pan comes from putting food into a pan that is not hot enough. Heat it for a few minutes on medium, add the fat, let it shimmer, then add the food and leave it alone until it releases on its own.
• Use a little more fat than you think for the first month, then less as the surface improves.

Expect a new pan to improve noticeably over its first dozen cooks. Eggs that welded themselves to the pan in week one will usually slide by week six, as long as the pan is dried and lightly oiled after every wash.

How carbon steel care differs from cast iron

Carbon steel and cast iron are close cousins, and their care is almost identical: seasoning, no soaking, no dishwasher, dry and oil after washing. The differences are in the metal. Carbon steel is thinner, lighter and smoother, so it heats and cools faster and takes seasoning more quickly. A few rounds on a hot burner, oiling and heating until it smokes, can season carbon steel well without the oven at all.

New carbon steel also arrives in two very different states. Some pans ship pre-seasoned and are ready to cook. Others are coated in beeswax or a protective oil purely to stop rust in the warehouse, and that layer has to be scrubbed off with hot water and soap before the first seasoning, or it will smoke and turn sticky. Check the insert or the listing before you start. In our carbon steel pans guide, four of the five picks said they came pre-seasoned, and none said what with.

Thinness also makes carbon steel more sensitive to warping from sudden temperature changes. Do not plunge a hot pan into cold water, and avoid heating an empty pan on high for long periods. The same care applies to a carbon steel wok, which gets hotter than most home pans ever do.

How to clean cast iron and carbon steel after cooking

The old rule against soap came from a time when soap contained lye, which really could strip seasoning. Modern dish soap does not. Lodge’s own care guidance says soap is fine on seasoned cast iron and that washing carbon steel in warm soapy water is what it recommends.

• Wash while the pan is still warm, with hot water, a little soap and a brush or non-scratch sponge.
• For stuck food, scrub with a paste of coarse salt and a splash of water, or use a chainmail scrubber. Simmering a little water in the pan for a minute loosens most residue.
• Never soak it and never put it in the dishwasher. Standing water is the fastest route to rust.
• Dry it immediately with a towel, then return it to low heat for a minute or two to drive off any water in the pores.
• Wipe on a few drops of oil while it is warm, then buff until it looks dry rather than glossy.

Can you cook tomatoes and other acidic foods in cast iron?

Yes, with some judgment. A well-seasoned pan handles a quick tomato sauce, a squeeze of lemon or a splash of wine to deglaze without trouble. What causes problems is long exposure: simmering acidic sauces for hours, or storing leftovers in the pan, can wear through thin seasoning, give food a metallic taste, and dull the surface underneath.

On a new or lightly seasoned pan, keep acidic cooking short until the seasoning has built up. For a long braise in tomatoes or wine, reach for an enameled Dutch oven or stainless steel instead. That trade-off is part of why most kitchens do best with two materials, which our cookware materials guide works through.

How to fix rust, sticky seasoning and flaking on a pan

Almost nothing ruins a cast iron or carbon steel pan permanently. Most problems take ten minutes and one oven cycle to put right.

How to restore a badly rusted or secondhand cast iron pan

Old cast iron from a thrift store or a relative’s cabinet is often worth saving, even when it is crusted black or covered in rust. As long as the pan is not cracked and sits flat, it can almost always be brought back.

1. Check it first. Hold it up to the light and look for hairline cracks, especially around the handle and base, then set it on a flat surface and press on the edges. A crack or a rocking wobble means it is not worth restoring for stovetop use.
2. Strip the old layers. For light rust, scrub hard with steel wool and hot soapy water. For thick, flaking buildup, many restorers spray the pan with a lye-based oven cleaner, seal it in a plastic bag for a day or two, then scrub and rinse, repeating as needed. Wear gloves and eye protection, and work somewhere ventilated.
3. Remove stubborn rust. A short soak in equal parts white vinegar and water loosens rust, but vinegar also attacks bare iron, so check every 15 to 30 minutes and stop as soon as the rust scrubs off. Never leave a pan in vinegar overnight.
4. Wash, dry and heat immediately. Bare iron flash-rusts within minutes of getting wet, so dry it with a towel and put it straight onto a burner or into a warm oven.
5. Season from scratch. Give it three to five thin coats in the oven, following the method above, before cooking in it.

The same approach works for carbon steel, with more gentleness. It is thinner, so aggressive scrubbing and long vinegar soaks take a bigger toll.

How to store cast iron, carbon steel and wooden boards

A surprising amount of rust happens in the cabinet rather than on the stove, usually because a pan was put away with a trace of moisture or stacked with a lid trapping humid air.

• Put pans away completely dry with a very light film of oil, never glossy or wet.
• Stack with a paper towel or pan protector between pieces, which absorbs moisture and stops the seasoning from scratching.
• Store lids off or ajar on cast iron and carbon steel, so air circulates rather than condensation forming.
• Never store food in the pan. Moisture and acids in leftovers eat into seasoning overnight.
• Keep boards on their edge in a rack or leaning against a wall, away from the dishwasher vent, the stove and the sink, where steam and heat make wood swell and crack.

How to care for enameled cast iron

An enameled Dutch oven or skillet is cast iron with a layer of glass fused over it, and that changes the rules. It needs no seasoning, it will not rust where the enamel is intact, and it happily takes long simmers of tomatoes, wine and vinegar that would strip bare cast iron.

Its weak points are the enamel itself. Sudden temperature changes can crack or craze it, so let a hot pot cool before washing and do not add cold liquid to a very hot empty pan. Heat it gradually on medium rather than blasting an empty pot on high. Clean it with a non-abrasive sponge, lift stubborn stains with a paste of baking soda and water, and avoid metal scouring pads. Check the maker’s guidance on dishwashers; most recommend hand washing to keep the finish looking new.

If the interior enamel chips down to the iron, the exposed spot can rust and food will stick there, so it is worth contacting the maker, since many offer long warranties. Our enameled cast iron Dutch oven guide also looks at a question almost no listing answers: whether the enamel has been tested for lead and cadmium.

What the recent cookware safety news means for cast iron and carbon steel

Two pieces of cookware news from the past year have sent a lot of people looking for safer pans, and both point toward the materials on this page rather than away from them.

Lead in imported aluminum and brass cookware. In August 2025 the FDA warned that certain imported pots and pans made from aluminum, brass and aluminum alloys sold as Hindalium, Hindolium, Indalium or Indolium can leach lead into food, and it has added more products to the list since. Its advice is to throw that cookware away, not donate or refurbish it. The warning does not name cast iron, carbon steel, stainless steel or enameled cookware. Bare cast iron and carbon steel have no coating at all: the only surface is the seasoning you bake on yourself. With enameled pieces, the enamel is the part worth asking about. See the FDA’s warning and product list, and for lead that comes from food itself rather than the pan, our explainer on heavy metals in organic food.

PFAS bans on nonstick coatings. Since January 1, 2026, Maine and Colorado have banned the sale of cookware with intentionally added PFAS, the family of “forever chemicals” behind many nonstick coatings. Maine’s rule targets PFAS in the surface that touches food. Seasoned cast iron and carbon steel get slick without any coating, which makes them a common choice for anyone moving away from nonstick, and the routine on this page is what keeps that surface working.

How to care for a wooden cutting board

A good wooden board lasts decades with a few minutes of care a month, and most failures come from one habit: getting it too wet for too long.

Almost every wooden board sold today, and every end grain board, is made from strips or blocks of wood glued together. When we compared them for our wooden cutting board guide, all of them were glued laminations and none of the listings named the adhesive. Soaking and dishwashers attack those glue joints as much as the wood itself, which is why a board can split along a seam long before the wood wears out.

• Wash by hand after each use with hot soapy water, scrubbing both sides so the board takes on and loses moisture evenly.
• Dry it standing on its edge or on a rack, never flat on the counter, where trapped moisture underneath causes warping.
• Oil it when it looks pale or dry, roughly monthly with regular use, with food-grade mineral oil or a board cream of mineral oil and beeswax. Rub in a generous coat, leave it overnight, and wipe off the excess.
• Skip cooking oils such as olive, vegetable or coconut oil on boards. Unlike on a hot pan, they never harden and can go rancid in the wood.
• Sanitize after raw meat with the solution the USDA recommends for both wooden and plastic boards: one tablespoon of unscented liquid chlorine bleach per gallon of water, left on the surface for several minutes, then rinsed and dried. Better still, keep a separate board for raw meat.
• Replace a board once knife grooves become deep enough that they are hard to clean, or if it cracks along a glue seam.

End grain and edge grain boards need slightly different attention. An end grain board, the checkerboard kind, shows the ends of the wood fibers on its surface, so it soaks up oil and water readily: oil it more often, especially when it is new, and dry it promptly. An edge grain board is more stable and absorbs less, so it tolerates a less regular routine. Either way, a board that darkens evenly when oiled and beads water on its surface is well protected.

A wooden board also works gently on knife edges, and a well-oiled one resists stains and smells far better than a dry one. Keep a cotton kitchen towel near the board for drying rather than letting it drip.

How to care for wooden spoons and cooking utensils

Wooden spoons, spatulas and salad servers follow the same rules as a board, with one extra habit: do not leave them standing in a hot pot. A spoon resting in simmering liquid absorbs water and heat for as long as it sits there, which is what makes wooden utensils crack, split and go fuzzy.

Wash them by hand promptly, dry them upright in a crock or on a rack rather than lying wet in a drawer, and rub them with food-grade mineral oil when they start to look pale and dry. A spoon that has turned rough can be sanded smooth with fine sandpaper and oiled again. Retire any utensil with a deep crack, since food and moisture collect inside it where washing cannot reach.

When a pan or board is past saving

These materials are famously durable, but a few kinds of damage cannot be fixed with scrubbing and oil:

• A crack in cast iron, however fine, can widen with heating and cooling, and the pan can fail suddenly. Retire it from stovetop use.
• A warped base that rocks on a flat burner heats unevenly, and on an induction cooktop it may barely heat at all. Thin carbon steel is the most prone to this.
• Enamel chipped through to bare iron inside an enameled pot exposes iron to rust and makes food stick in that spot. Check the warranty before replacing it.
• A board split along a glue seam or grooved too deeply to clean properly is a hygiene problem rather than a cosmetic one, and should be replaced.

A care schedule for cast iron, carbon steel, enamel and wood

Questions about caring for cast iron, carbon steel and wood

Can you use soap on cast iron?

Yes. Modern dish soap is not harsh enough to remove polymerized seasoning, and Lodge says soap is fine on seasoned cast iron. What damages seasoning is soaking, the dishwasher, and leaving the pan wet.

How often should you season a cast iron pan?

A pan you cook with regularly rarely needs a full oven seasoning, because cooking with fat keeps adding layers. Wipe on a thin film of oil after each wash, and do an oven round only when the surface looks dull, patchy or has rusted.

Can you put carbon steel in the dishwasher?

No. A dishwasher strips the seasoning and leaves carbon steel wet for long enough to rust. Wash it by hand in warm soapy water, dry it on the burner, and wipe on a little oil.

Why is my cast iron sticky after seasoning?

Too much oil was applied, so it never fully hardened. Bake the pan upside down at 450 to 500 degrees Fahrenheit for another hour. If it stays tacky, scrub it back and season again with a much thinner coat, wiping off as much oil as you can before baking.

What oil should I use on a wooden cutting board?

Food-grade mineral oil, or a board cream made from mineral oil and beeswax. Avoid olive, vegetable and coconut oils on boards, because they do not harden at room temperature and can turn rancid in the wood.

How do you sanitize a wooden cutting board?

Wash it with hot soapy water first, then apply the USDA’s sanitizing solution of one tablespoon of unscented liquid chlorine bleach per gallon of water, let it stand for several minutes, rinse and dry it on its edge. Keeping a separate board for raw meat reduces the need.

Can you use steel wool on cast iron?

Yes, when you mean to. Steel wool will scrub off rust and damaged seasoning, which is exactly what you want before re-seasoning a neglected pan. For everyday cleaning, use a brush, a non-scratch sponge or a chainmail scrubber instead, so you are not wearing away seasoning you want to keep.

Why does my wooden spoon crack?

Usually from being left standing in hot liquid or soaked in water, then drying out quickly. Wash wooden utensils promptly, dry them upright, never leave them in a simmering pot, and oil them when they look dry.

Does enameled cast iron need seasoning?

No. The glass enamel coating protects the iron, so enameled cast iron needs no seasoning and does not rust where the enamel is intact. Care for it with gentle, non-abrasive cleaning and by avoiding sudden temperature changes.

Sources

• Lodge Cast Iron: How to Season
• Lodge Cast Iron: Carbon Steel Cleaning and Care
• USDA Food Safety and Inspection Service: Cutting Boards
• FDA: Imported Cookware That May Leach Lead
• Maine Department of Environmental Protection: PFAS in Products
• Colorado Department of Public Health and Environment: PFAS Laws

Related reading

• Organic Household hub
• Best Cast Iron Skillets
• Best Stainless Steel Cookware
• Cookware materials compared
• our organic product database — compare brands across every guide
• Best Wooden Cooking Utensils

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