Emily ParkerBy Emily Parker

Updated November 2026

Learning how to properly season a cast iron skillet means baking thin layers of oil onto the metal so it forms a hard, slick coating called polymerized oil. Once done correctly, the pan resists sticking, shrugs off rust and gets better with use. The process takes about an hour of active work plus cooling time, and you only need a few basic supplies.

What You Need Before You Start

Gather everything first so the pan does not sit warm and exposed while you hunt for supplies. Manufacturers and cast iron experts generally recommend a high smoke-point oil such as flaxseed, grapeseed, canola or vegetable shortening.

Shopping for one? See our guide: 7 Best Flaxseed Oils to Season Cast Iron Skillets with Flaxseed Oil (2026).

  • A clean cast iron skillet with no food residue
  • Dish soap and a stiff brush or non-abrasive scrubber
  • A lint-free cloth or paper towels
  • About 1 teaspoon of high smoke-point oil
  • A rimmed baking sheet or sheet of aluminum foil
  • An oven that can reach 450–500°F

Step-by-Step Seasoning Method

Step 1: Clean and dry the pan

Wash the skillet with warm water and a small amount of dish soap, scrubbing away any sticky film. Dry it completely on the stove over low heat for a few minutes, since any leftover moisture can cause rust under the oil.

Step 2: Apply a very thin layer of oil

Pour a small amount of oil onto a paper towel and wipe the entire pan inside and out, including the handle and the underside. Then buff it with a clean dry towel until the surface looks almost dry. Too much oil creates a sticky, uneven finish, so thin is better.

Step 3: Bake the pan upside down

Place a sheet of foil or the baking sheet on the lower oven rack to catch drips. Set the skillet upside down on the upper rack, then heat the oven to 450–500°F and bake for one hour. Turn off the oven and let the pan cool inside before removing it.

Step 4: Repeat for a durable layer

One coat is a start, but three to five thin coats produce a noticeably harder surface. Repeat steps 2 and 3 as many times as you like, letting the pan cool between rounds.

Choosing the Right Oil and Temperature

The oil and temperature you pick decide how well the coating bonds. Oils with a higher smoke point polymerize more reliably at oven temperatures, while low smoke-point oils tend to stay tacky.

Oil or fat Smoke point (approx.) Notes
Flaxseed oil About 225°F refined, lower unrefined Forms a very hard finish; can flake if applied too thickly
Grapeseed oil About 420°F Neutral flavor, reliable bond
Canola oil About 400°F Widely available and easy to work with
Vegetable shortening About 360°F Solid fat, very easy to apply thinly

Common Mistakes to Avoid

  • Applying too much oil, which leaves a sticky, gummy surface
  • Skipping the thin buffing step so oil pools in the pan
  • Seasoning at too low a temperature, which prevents proper bonding
  • Putting the pan in the oven with the handle facing down and no drip catcher
  • Failing to dry the pan fully after washing, which invites rust
  • Flaxseed oil is often chosen by cooks who want a very hard, durable finish. View on Amazon
  • Grapeseed oil has a high smoke point and a neutral taste, which makes it an easy everyday choice. View on Amazon
  • A stiff nylon scrubbing brush removes stuck-on residue without stripping the surface. View on Amazon

FAQ

How often should I season my cast iron skillet?

Many cooks re-season whenever the surface looks dull or food begins to stick. Regular cooking with fats also builds up seasoning naturally over time.

Can I season a cast iron skillet on the stovetop instead?

Yes, you can heat a thin layer of oil in the pan until it smokes lightly, then wipe it out. The oven method usually produces a more even, durable coating, though.

Why is my skillet sticky after seasoning?

Sticky patches almost always mean too much oil was applied. Bake the pan again at high heat, and wipe the next coat on much more thinly.

Conclusion

Seasoning a cast iron skillet is a simple process of cleaning, applying a thin oil layer and baking it at high heat. Repeat the coating a few times for the best results. With regular use and proper care, your pan will develop a slick surface that improves for decades.

Ready to choose one?

Emily Parker

About Emily Parker

Emily Parker is part of our editorial team and reviews and edits our cookware & knives guides, checking product details against manufacturer specifications and owner feedback.