Can You Use Soap on Cast Iron?
Yes, you can use soap on cast iron. But before you go squeezing out a deluge of Dawn, you should know a few things about using soap on cast iron.
Cooks for generations didn't use soap on cast iron pans because the soaps were made with lye and vinegar, two ingredients that will absolutely strip the seasoning and can even damage the pan's iron.
Will Soap Ruin Cast Iron?
Using soap will not ruin your pan. It is fine on enameled cast iron, and on plain cast iron, too. It's not going to destroy your seasoning. With enameled cast iron, you're done: Wash and dry. With plain, uncoated cast iron, follow up by very lightly oiling that clean, dry pan and heating it until the oil bonds to the cast iron surface.
Many sources explain that soap is OK because today's dish soap is gentler than it used to be. That may be true, but it's not really the point. Once your pan is well seasoned, a little dish soap isn't going to make a difference.
Is the Pan Still Dirty if You Don't Use Soap?
No. If you heat your skillet after wiping it out and rinsing it, the bacteria can't survive that heat. There is no food or moisture left, either. Everything is clean and dry.
But: If I ever wanted to use a few drops of soap to break up and remove excess oil, I would. It wouldn't harm or strip the natural nonstick surface of my well-seasoned cast iron.
So, bottom line: If it makes you feel better, do it. It certainly doesn't hurt. But you don't have to.
How to Clean Your Cast Iron Skillet With Soap
Use these five simple steps to clean your cast iron skillet with soap.
After the pan has mostly cooled, use a pan scraper to get rid of stuck-on food and debris.
Pour a small amount of soap into the pan. Add a small bit of warm water, and use a nylon brush or sponge to clean the pan, inside and out.
Promptly dry the pan with a paper towel or lint-free tea towel.
Put the pan back on the stove, and turn the heat to medium. Let the pan heat thoroughly, about three to five minutes. Then, let the pan cool completely.
Rub a very light layer of cooking oil-you can use flaxseed, canola, or vegetable oil-on the surface of the skillet. Wipe out any excess, and store the pan until you're ready to use it again.
