Seasoning a cast iron skillet that has lost its seasoning is a straightforward process. Here's a step-by-step guide to help you restore its seasoning:
Clean the skillet: Start by thoroughly cleaning the cast iron skillet. Use hot water, a stiff brush, and a mild soap if needed to remove any rust, residue, or old seasoning. Avoid using harsh detergents or steel wool, as these can damage the surface.
Dry the skillet: Once the skillet is clean, use a towel to dry it completely. It's essential to remove all moisture to prevent the skillet from rusting.
Apply a thin layer of oil: Choose an oil with a high smoke point for seasoning, such as vegetable oil, flaxseed oil, grapeseed oil, or canola oil. Olive oil and butter are not recommended for this purpose due to their low smoke points. Apply a thin layer of the chosen oil to the entire skillet, including the handle and outside.
Preheat the oven: Place the skillet upside-down on the middle oven rack to catch any drips. Preheat the oven to around 375°F (190°C).
Bake the skillet: Let the skillet bake in the oven for about 1 hour. This will allow the oil to polymerize, forming a protective layer that restores the skillet's non-stick properties.
Cool the skillet: Turn off the oven and let the skillet cool completely inside before removing it. The cooling process may take a few hours.
Repeat the process: If your skillet still doesn't have a good seasoning layer after the first round, you can repeat steps 3 to 6 a couple more times. More layers of seasoning will enhance the skillet's non-stick surface.
Maintain the seasoning: After seasoning the skillet, use it regularly to help maintain its seasoning. When cooking, try to use a little oil or fat to help preserve the non-stick surface.
Remember that seasoning a cast iron skillet is an ongoing process. Over time and with regular use, the skillet's seasoning will improve, providing you with a durable and naturally non-stick cooking surface.