Restoring and Maintaining Cast Iron
A cast iron pan is a lifetime tool that only improves with neglect, provided that neglect is intentional. The goal is to build layer upon layer of carbonized oil until the surface is slick enough to slide an egg without hesitation.
Heat is your best friend and worst enemy
Avoid soaking the pan, as moisture is the only way to ruin the metal. Keep your oil choice neutral and ensure it has a high smoke point for the best results.
- Stiff-bristled plastic brush
- Lint-free rags or paper towels
- Grapeseed or flaxseed oil
- Kosher salt
Thin is the only way
If your pan feels tacky or gummy after oiling, you used too much. Apply oil, then buff it off as if you are trying to remove every drop; the molecules left behind are all you need for the next layer.
The method.
Clean while warm
Wash the pan under hot water immediately after cooking. Use a stiff brush to dislodge food particles. If bits are stuck, pour in a tablespoon of kosher salt and scrub with a dry towel until clean.
Drive off the moisture
Place the wet pan directly onto a stovetop burner set to medium-low. Leave it until the heat evaporates every trace of water and the iron turns a dull, matte gray.
Apply the oil
Add a few drops of oil to the warm pan. Using a rag, coat the entire interior and the rim. Keep buffing with a clean cloth until the surface looks dry but holds a faint, dark luster.
The final bake
Leave the pan on the burner for another minute until the oil just begins to shimmer and smoke slightly, then turn off the heat and let it cool completely.
When it doesn't go to plan.
Never put cast iron in the dishwasher; it will strip years of seasoning in one cycle.
If you find light rust spots, scour them away with steel wool before re-seasoning.
Store the pan with a paper towel tucked inside to prevent condensation and dust buildup.
The ones that keep coming up.
Can I use soap on my cast iron?
Modern mild dish soap will not strip polymerized oil, but avoid soaking the pan in soapy water for extended periods.
Why is my pan turning silver?
You are likely cooking acidic ingredients like tomatoes or wine. This strips the seasoning; just wash, dry, and apply a fresh thin coat of oil as usual.
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