Cast Iron Skillet Seasoning
A flaxseed oil method for building a durable non-stick seasoning layer on cast iron cookware
4 hrs intermediate Yields 1 skillet
Ingredients
- 1 tbsp Flaxseed oil (food-grade, cold-pressed)
- 2 tbsp Coarse salt (for pre-seasoning scrub)
- 4-5 sheets Paper towels
- as needed Warm water (for initial cleaning only)
Steps
- If the skillet has rust or damaged seasoning, scrub with 2 tablespoons of coarse salt and a damp paper towel. Rinse briefly.
- Place the skillet on a burner over medium heat for 2-3 minutes to evaporate all moisture.
- Preheat oven to 500F. Place aluminum foil on the bottom rack to catch drips.
- Rub about 1/2 tablespoon of flaxseed oil over the entire skillet — inside, outside, bottom, and handle.
- Wipe off as much oil as possible with a clean, dry paper towel. The pan should look almost dry.
- Place the skillet upside down on the middle oven rack. Bake for 1 hour.
- Turn off the oven and let the skillet cool inside for at least 1 hour. Do not open the door.
- Repeat steps 4-7 two more times for a total of three seasoning layers.
Why It Works
When oil is heated past its smoke point, the fatty acid chains recombine into a cross-linked polymer that bonds to the iron. This creates a hard, smooth, food-safe layer.
Flaxseed oil is a drying oil that polymerizes more completely than olive or vegetable oil, producing a harder, more durable coating.
Thin oil layers polymerize uniformly. Excess oil pools and creates sticky patches — that is why the wipe-off step is essential.
Tips
- Cook fatty foods first. Bacon, sausage, or other fatty foods reinforce the seasoning layer.
- Never soak. Standing water destroys seasoning and causes rust. Clean immediately and dry on the burner.
- Re-season annually. You will notice when it is time — food starts sticking where it previously slid.