Cast iron has a reputation for being high-maintenance. People act like if you look at it wrong, you’ll ruin the seasoning and have to start over. That’s not true. Cast iron is one of the most durable, forgiving pieces of cookware you can own. Here’s everything you actually need to know.
Seasoning: What It Is and Why It Matters
Seasoning isn’t a spice. It’s a thin layer of polymerized oil that creates a natural non-stick surface on the pan. Every time you cook with oil at high heat, you’re adding to this layer. Over time, a well-used cast iron pan becomes practically non-stick without any chemical coatings.
How to Clean It
- While the pan is still warm (not screaming hot), rinse it under hot water.
- Use a stiff brush or chain mail scrubber to remove stuck-on food. A little coarse salt works as an abrasive too.
- Dry it completely with a towel or put it on the stove over low heat for a minute.
- Rub a very thin layer of oil (vegetable, canola, or flaxseed) over the entire surface.
- Store it somewhere dry.
Common Myths
“Never use soap.” Modern dish soap is fine. It won’t strip your seasoning. The old advice came from when soap contained lye, which would eat through the oil layer. Regular Dawn? Totally safe.
“Never cook acidic foods.” You can cook tomato sauce or deglaze with wine in cast iron. Just don’t let acidic food sit in the pan for hours. A quick simmer is fine.
“You need to season it in the oven for hours.” You can, but cooking with it regularly does the same thing over time. Just use it. That’s the best seasoning method there is.
If It Rusts
Don’t panic. Scrub the rust off with steel wool, wash with soap and water, dry completely, then re-season it in the oven at 450F for an hour with a thin coat of oil. It’ll come back to life.
A good cast iron skillet will last you a lifetime. Treat it reasonably well and it will only get better with age.