It's generally not recommended to use cooking spray directly on a cast-iron skillet. While cooking spray can be convenient for preventing sticking, it can leave a residue on the skillet's surface and may cause a buildup of gunk over time. Additionally, some cooking sprays contain additives that can break down at high temperatures, leaving behind a sticky residue that's difficult to remove.
If you want to use a cooking spray-like substance on your cast-iron skillet, a better alternative is to apply a thin layer of cooking oil with a high smoke point, such as vegetable oil, canola oil, or flaxseed oil. Here's how to do it:
After cleaning the skillet, ensure it is completely dry.
Take a paper towel or a cloth and add a small amount of oil to it. You want just enough to coat the skillet lightly.
Use the oiled paper towel or cloth to rub the oil all over the interior surface of the skillet, including the sides and bottom. Make sure to cover it evenly.
Heat the skillet over low to medium heat for a few minutes to help the oil bond with the surface. This process is called "seasoning" and helps create a non-stick layer on the skillet.
Allow the skillet to cool down, and it's ready for use.
By following this method, you can maintain the non-stick properties of your cast-iron skillet without using cooking spray and risking potential buildup or damage to the pan's surface. Regularly seasoning your cast-iron skillet and using proper cooking and cleaning techniques will help ensure it serves you well for many years to come.