The process of seasoning an uncoated cast iron pan occurs gradually over time with regular use and proper care. Seasoning is the process of building up a natural non-stick surface on the cast iron by polymerizing oils onto its surface, creating a protective layer.
If you use and wash the cast iron pan by hand after each use, it will take several weeks to months of regular cooking and maintenance to achieve a well-seasoned surface. The exact time can vary depending on the frequency of use, the types of foods cooked, and the oils used during the seasoning process.
Here are some general guidelines for seasoning an uncoated cast iron pan if used every day and washed by hand after each use:
Initial seasoning: Before using the pan for the first time, it's recommended to apply a thin layer of cooking oil (e.g., vegetable oil, flaxseed oil, or grapeseed oil) to the entire surface, including the handle. Preheat the oven to around 350°F (175°C), place the pan upside down on the oven rack, and bake it for about an hour. This initial seasoning helps start the process of building the non-stick surface.
Regular use: Cooking with the cast iron pan every day is essential for building up the seasoning. The heat from cooking helps to bond the oils to the pan's surface, enhancing its non-stick properties over time.
Proper cleaning: After each use, hand wash the pan with hot water and a brush or sponge. Avoid using soap, as it can strip away the seasoned layer. Instead, use a little warm water and gentle scrubbing to remove any food residue.
Drying thoroughly: After washing, dry the pan thoroughly using a towel or by placing it over low heat on the stovetop. Moisture can cause cast iron to rust, so it's essential to ensure it is completely dry.
Applying oil as needed: Periodically, you may need to apply a thin layer of oil to maintain and improve the seasoning. This can be done after washing and drying the pan. Apply a small amount of oil and rub it all over the surface, then use a clean cloth or paper towel to remove any excess.
Remember that the seasoning process is ongoing, and the more you use and care for your cast iron pan, the better the seasoning will become. Over time, you'll notice the pan develops a darker, smoother surface, providing excellent non-stick properties and enhancing the flavor of your dishes. With proper care and regular use, an uncoated cast iron pan can become a beloved kitchen tool that lasts for generations.