Yes, cast iron skillets do require seasoning to maintain their non-stick surface and prevent rusting. Seasoning involves the process of creating a layer of polymerized oil on the surface of the skillet, which provides a natural non-stick coating and protects the iron from moisture.
To season a cast iron skillet, you can follow these steps:
- Preheat your oven to around 375°F (190°C).
- Thoroughly wash the skillet with warm water and mild soap to remove any factory coatings or residues. Scrub it gently with a sponge or brush.
- Rinse the skillet well and dry it completely with a clean towel.
- Apply a thin layer of cooking oil or solid shortening (such as vegetable oil, canola oil, or flaxseed oil) to the entire skillet, including the outside and the handle.
- Wipe off any excess oil with a paper towel. The layer of oil should be very thin, as thick layers can become sticky and create a gummy residue.
- Place the skillet upside down on the oven's middle rack, with a sheet of aluminum foil or a baking tray on the rack below to catch any drips.
- Bake the skillet for about one hour.
- Turn off the oven and let the skillet cool down inside the oven.
Seasoning helps build up a natural non-stick coating over time. Initially, you might need to repeat the seasoning process a few times to establish a good seasoning layer. After that, regular use and proper cleaning will help maintain the seasoning.
As for how often you should season your cast iron skillet, it depends on how frequently you use it and how well the seasoning is holding up. If the skillet starts to lose its non-stick properties or if you notice any rust spots, it's a good indication that it needs to be re-seasoned. In general, it's a good practice to lightly oil your cast iron skillet after each use and to periodically give it a full seasoning treatment every few months or as needed.