How to Season a Cast Iron Skillet

Updated March 2026 · 5 min read

Seasoning is the process of baking a thin layer of oil onto cast iron until it polymerizes — transforms into a hard, smooth, nonstick coating. A well-seasoned cast iron skillet can rival any expensive nonstick pan, and it gets better with every use. This guide covers initial seasoning, maintenance, and how to restore a neglected or rusty skillet.

What You Need

Your cast iron skillet (new or stripped)
A high-smoke-point oil (flaxseed, grapeseed, canola, or vegetable oil)
Paper towels or a lint-free cloth
An oven
Aluminum foil (optional, to catch drips)

Step-by-Step Seasoning

Clean the skillet thoroughly. If it is new, wash it with warm soapy water to remove the factory coating. If it is old and rusty, scrub with steel wool or a chain-mail scrubber until you reach bare metal. Rinse and dry completely.
Dry with heat. Place the skillet on a burner over medium heat for 2–3 minutes to evaporate every trace of moisture. Water is the enemy of cast iron.
Apply a very thin layer of oil. Pour about half a teaspoon of oil onto a paper towel and rub it over the entire skillet — inside, outside, and handle. Then take a clean paper towel and wipe off as much oil as you can. The layer should be so thin it looks almost dry. This is the most important step: too much oil creates a sticky, gummy finish.
Place upside down in the oven. Set the oven to 450°F (230°C). Put the skillet upside down on the middle rack with a sheet of foil on the rack below to catch any drips.
Bake for 1 hour. The oil will polymerize into a hard, dark coating.
Cool in the oven. Turn off the oven and let the skillet cool completely inside. Do not rush this step.
Repeat 2–3 times. Each round adds another layer of seasoning. Three rounds gives you a solid base that will hold up well during cooking.

Key point: The most common mistake is applying too much oil. If your seasoning comes out sticky or tacky, you used too much. Strip it with steel wool and start again with a thinner coat.

Best Oils for Seasoning

The ideal oil has a high smoke point and polymerizes well. Here are the best options, ranked:

Flaxseed oil — creates the hardest, most durable seasoning. However, it can flake if applied too thickly. Use very thin layers.
Grapeseed oil — high smoke point, neutral flavor, excellent results. Many experienced cast iron users prefer this.
Canola or vegetable oil — widely available and works well. The most practical choice for most people.
Crisco (vegetable shortening) — the traditional choice. Creates a very even coating.

Avoid olive oil (smoke point too low) and butter (milk solids burn and do not polymerize properly).

Daily Care and Maintenance

After Cooking

While the pan is still warm, rinse under hot water and scrub with a stiff brush or scraper. For stuck-on food, use coarse salt as an abrasive with a little oil.
Dry immediately and thoroughly — towel dry, then heat on the stove for a minute.
Apply a very thin coat of oil while the pan is still warm. Wipe off any excess.

Can You Use Soap?

Yes. Modern dish soap is mild and will not strip polymerized seasoning. The "never use soap" rule dates back to when soap contained lye, which actually did dissolve seasoning. Regular dish soap is fine for everyday cleaning.

What to Avoid

Soaking in water. Never leave cast iron sitting in water. It will rust.
The dishwasher. The combination of prolonged water exposure and harsh detergent will strip seasoning and cause rust.
Highly acidic foods (at first). Tomato sauces, wine reductions, and citrus can break down new seasoning. Once your pan has 6+ months of built-up seasoning, acidic foods are fine in moderation.

Restoring a Rusty Skillet

Rust looks alarming but cast iron is almost impossible to ruin permanently. Here is how to bring a rusty pan back to life:

Scrub off all rust with steel wool or a wire brush until you see bare gray metal.
Wash with soapy water and dry thoroughly.
Season from scratch using the oven method described above (3 rounds).

For extremely rusty or crusty pans (like flea-market finds), soak in a 50/50 solution of white vinegar and water for 1–2 hours. The acid dissolves rust quickly. Do not soak longer than a few hours or the vinegar will start to pit the iron itself.

Building Seasoning Through Cooking

Oven seasoning gives you a base, but the best seasoning is built through regular cooking. The more you cook with fat — frying, sautéing, searing — the more seasoning you build. Some of the best foods for building seasoning early on:

Bacon and sausage
Pan-fried potatoes or hash browns
Cornbread (baked in the skillet)
Stir-fries with generous oil

Avoid cooking eggs, fish, or delicate foods in a newly seasoned pan. Wait until the seasoning is well-established (after a few weeks of regular use).

Long-term care: A well-maintained cast iron skillet lasts generations. Many families pass them down as heirlooms. The seasoning only gets better with time and use.

Ready to put your freshly seasoned skillet to work? Browse our recipe collection for dishes that are perfect for cast iron cooking. For safe storage of your cooked creations, check our food storage guide.