Tiffany Haney
Cast-iron pans are a popular choice for cooking due to their durability and natural non-stick surface. However, over time, the seasoning on these pans can break down due to various reasons, such as over-scrubbing, cooking acidic foods, or exposure to excessive heat. When this happens, the pan may develop rusty patches, become dull, or start sticking. To address this, it is necessary to reseason the pan, which involves cleaning and restoring the natural non-stick coating. This process typically includes scrubbing the pan with hot, soapy water, removing rust, and thoroughly drying the pan. Once clean, the pan is coated with a thin layer of oil, such as canola or grapeseed oil, and baked in an oven at a high temperature to create a smooth, non-stick surface once again.
How to Reseason a Cast-Iron Pan
| Characteristics | Values |
|---|---|
| When to Reseason | When the pan has rusty patches, looks dull, or isn't non-stick |
| How Often | Once or twice a year or whenever the pan surface is drying or rusting |
| Cleaning | Scrub the pan with hot, soapy water and a nylon brush or fine steel wool scrubber |
| Alternatively, soak the pan in equal parts vinegar and water for up to eight hours | |
| Drying | Dry the pan thoroughly inside and out |
| Oil | Coat the entire pan with a thin layer of oil with a high oleic index, such as safflower or canola oil |
| Other options include grapeseed oil, avocado oil, vegetable oil, flaxseed oil, olive oil, or peanut oil | |
| Baking | Preheat the oven to 350°F and place the pan upside down on the middle rack with a sheet of aluminum foil below to catch drips |
| Bake for 30 minutes to one hour until the smoke disappears, indicating the polymerization process is complete | |
| Cooling | Turn off the oven and let the pan cool completely before wiping away excess oil with a paper towel |
| Maintenance | Wash with hot water (no soap) and dry thoroughly after each use |
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What You'll Learn
Cleaning your cast-iron pan
To clean your cast-iron pan, start by scrubbing it in hot water. If your pan has a lot of rust, you can use hot, soapy water and a nylon scrub brush or fine steel wool scrubber to remove the rust. If you have some tough residue to remove, coarse salt, a Brillo pad, or chain mail can help. Another method for cleaning rust is to immerse your pan in equal parts vinegar and water. Keep checking on the pan's progress—the rust may be gone within an hour, but you can soak it for up to eight hours if needed. Once your pan is clean, dry it thoroughly inside and out.
After cleaning, you'll want to reseason your pan to restore its non-stick properties and protect it from rust. To do this, use a paper towel to apply a thin coating of oil with a high oleic index, such as safflower or canola oil, to the entire pan, including the handle. Alternatively, you can use shortening. Preheat your oven to 350°F (or a minimum of 400°F if you used canola oil). Place the pan upside down on the middle rack of the oven, with a sheet of aluminum foil on the lower shelf to catch any drips. Bake the pan for 30 minutes to one hour. You might need to repeat the baking step a few times to achieve the desired finish. Once the smoke is gone, you'll know the polymerization process is complete.
After baking, turn off the oven and leave the pan inside to cool completely. When the pan is cool, wipe away any excess oil with a paper towel. Wash the pan with hot water (no soap) and dry it thoroughly. If a cast-iron pan is not completely dry, it will rust, so be sure not to let it soak in water for long periods.
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Drying your cast-iron pan
Once your pan is clean and dry, it's time to season it. Seasoning a cast iron pan involves baking oil onto the surface to create a non-stick coating. Start by coating the entire pan, including the handle, with a thin layer of cooking oil. Oils with a high oleic index, such as safflower or canola, are ideal for seasoning cast iron. You can also use vegetable or corn oil, which are unsaturated fats that work well and are easier to spread than saturated fats.
After coating the pan with oil, buff it thoroughly so that it no longer looks greasy. Even a small amount of excess oil can pool during seasoning, forming hardened droplets or turning sticky if the pan is left unused for a few days. Once your pan is coated and buffed, it's ready for the oven. Place a sheet pan or aluminium foil on the middle rack of the oven to catch any drips, then place your cast iron pan upside down on the top rack. Bake at 350°F (177°C) for one hour.
After seasoning, your pan will need to cool down before use. Turn off the oven and leave the pan inside to cool completely. Once the pan is cool, wipe away any excess oil with a paper towel. When you're ready to cook, wash the pan with hot water (no soap) and dry it thoroughly. Proper drying and maintenance will help prevent rust and ensure your cast iron pan remains in good condition for years to come.
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Oiling your cast-iron pan
Firstly, ensure your pan is clean and completely dry. You can use hot, soapy water and a nylon scrub brush or fine steel wool scrubber to remove rust. Then, dry the pan thoroughly inside and out.
Next, coat the pan with oil. Use a paper towel soaked in oil or a spray to apply a thin layer of oil all over the pan, including the inside, outside, and handle. You can use any cooking oil or fat, but oils with a high oleic index, such as safflower or canola, are recommended as they perform well at high temperatures. Avoid using too much oil, as you don't want the pan to be slippery.
After coating the pan in oil, place it upside down on the middle rack of an oven preheated to 350˚F. Put a sheet of aluminum foil on the lower shelf to catch any drips. Bake the pan for 30 minutes to one hour. You will know the polymerization process is complete when the smoke radiating from the pan disappears.
Once the pan has baked, turn off the oven and leave the pan inside to cool completely. When the pan is cool, wipe away any excess oil with a paper towel.
To maintain the seasoning, avoid using soap when washing the pan, and dry it thoroughly after each use. Oiling the pan after each use is also recommended for long-term care.
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Baking your cast-iron pan
Cast iron skillets are durable, affordable, and perfect for a variety of cooking techniques. Seasoning a cast-iron pan is essential to prevent rusting, ensure an even cooking surface, and create a non-stick cooking surface.
Step 1: Clean the Pan
Scrub the pan with hot, soapy water to remove any residue or rust. You can use a nylon scrub brush or fine steel wool. If there is stubborn rust, try using kosher salt and an abrasive brush, followed by rewashing with soapy water. Ensure the pan is thoroughly cleaned and dried.
Step 2: Coat the Pan with Oil
Use a clean paper towel or spray to coat the entire pan, inside and out, with a thin layer of oil. You can use vegetable oil, canola oil, flaxseed oil, olive oil, or any cooking oil or fat. Absorb any excess oil with a paper towel.
Step 3: Preheat the Oven
Preheat your oven to a minimum of 400 degrees Fahrenheit. If using canola oil, preheat to a higher temperature of 425-450 degrees Fahrenheit to ensure the oil's smoke point is reached. Place a sheet of aluminum foil on the lower rack to catch any oil drips.
Step 4: Bake the Pan
Place the pan upside down on the middle rack of the preheated oven. Bake for 30 minutes to 1 hour. You will know the polymerization process is complete when you no longer see smoke rising from the pan. Turn off the oven and leave the pan inside to cool slowly.
Step 5: Wipe Excess Oil
Once the pan has cooled, use a paper towel to wipe away any excess oil. Your cast-iron pan is now seasoned and ready to use!
Repeat the baking process two to three times to achieve the best results and a smooth, non-stick surface. Regular use of your cast-iron pan will also help maintain and improve its seasoning over time.
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Maintaining your cast-iron pan
Cleaning
While cleaning your cast-iron pan, it is essential to avoid using harsh chemicals or abrasive cleaning materials. Instead, opt for washing your pan with hot water and a small amount of mild soap or dish soap. Use a soft sponge or cloth to gently scrub the surface. If there are stubborn, stuck-on food residues, you can simmer some water for a few minutes to loosen them before scraping them off with a pan scraper. Avoid soaking your cast-iron pan in water for extended periods, as it may lead to rusting.
Drying
After washing, thoroughly dry your cast-iron pan. Use a lint-free cloth or paper towel to absorb any moisture. Ensure that the pan is completely dry before putting it away or using it again. Leaving a cast-iron pan damp can lead to rust formation.
Oiling
Once the pan is dry, it is a good practice to apply a thin layer of oil to the surface. You can use cooking oil, such as canola oil, or a seasoning spray. The oil helps to maintain the seasoning of the pan and prevents rust. Use a paper towel to wipe the oil across the surface until there is no visible residue.
Cooking
When cooking with your cast-iron pan, avoid using it for acidic foods, such as tomato-based dishes or dishes with lemon. Acidic substances can damage the coating of the pan. It is also advisable to avoid cooking fish or eggs in the cast-iron pan, as these foods can cause sticking. Instead, use your cast-iron pan for searing meats, frying bacon, sautéing vegetables, or frying chicken.
Re-seasoning
From time to time, you may need to re-season your cast-iron pan to maintain its non-stick properties and prevent rusting. This process involves scrubbing the pan with steel wool or a metal scrubber to remove any rust or stuck-on food residues. After cleaning and drying the pan, apply a thin, even layer of cooking oil, such as canola oil, to the entire surface, including the inside, outside, and handle. Place the pan upside down in the oven on the middle rack and put a sheet of aluminum foil on the lower shelf to catch any drips. Preheat the oven to between 350°F and 500°F and bake the pan for about an hour. Allow the pan to cool completely in the oven, and then wipe away any excess oil with a paper towel.
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Frequently asked questions
If your cast-iron pan has rusty patches, looks dull, or isn't as non-stick as it used to be, it's time to reseason the pan.
First, scrub the pan well in hot, soapy water using a nylon scrub brush or fine steel wool scrubber to remove rust. Then, dry the pan thoroughly inside and out.
You can use cooking oils such as grapeseed oil, avocado oil, canola oil, safflower oil, or shortening. These oils have a higher smoke point, which is good when cooking at high heat.
Coat the entire pan, inside and out, with a thin layer of oil. Preheat your oven to at least 400°F (204°C) and place the pan upside down on the middle rack with a sheet of aluminum foil on the lower shelf to catch any drips. Bake for 30 minutes to 1 hour, until the smoke from the pan has disappeared. Turn off the oven and leave the pan inside to cool completely. Once cool, wipe away any excess oil with a paper towel.
It is recommended to reseason your cast iron pan a couple of times a year or any time you notice the surface of your pan drying up or rusting.
