What’s The Best Oil For Seasoning A Cast-Iron Skillet?

While any oil can technically be used to season a cast iron, there is much debate on determining the best choice. The ideal oil should have a high smoke point, be resistant to rancidity, and possess a neutral flavor that won’t mess up the taste of the dish you want to cook.

Originally, cast irons were seasoned with lard. I personally do not suggest that, as lard can go rancid fast and add a porky taste to things, which does not work when you want to make a sweet treat in cast iron. 

I heard flaxseed oil is getting popular, supposedly because it bonds with the cast iron well,  but it has a low smoke point and a powerful flavor, particularly when it oxidizes (it tastes fishy!). I think grapeseed or one of the refined vegetable oils is fine if you want a cheap option, or avocado oil if you want to be a little more health-conscious and don’t mind paying a bit extra. 

Which Oils Are Considered The Best For Seasoning

Grapeseed, safflower, canola, or any refined oil with a neutral taste and high smoke point will suffice for seasoning cast iron. They are inexpensive, easy to find at every grocery store, and easy to apply. 

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With its smoke point of 420 degrees Fahrenheit, grapeseed oil secures the top spot on the list for its high smoke point, saturated fat content, and durability. This oil has a neutral taste and odor, and its 10% saturated fat content aids in effective polymerization, resulting in a thin protective layer of seasoning on the bottom of the cookware. It is the number 1 choice for many cast iron owners out there. 

Safflower oil has a high smoke point of about 500 degrees but would be a good option if you use your cast iron for high-heat cooking. Its low viscosity penetrates the metal, forming a resilient coating that withstands the test of time, even when applied without oven heat.

Avocado oil is a great choice for health reasons and because of the high smoke point. You can turn up the heat in the oven when seasoning to get it to sink in well. Though, be warned. Some people report that they can taste this in their cast iron cooked dishes. Avocado oil is high in monounsaturated fats, which are more resistant to heat and less likely to produce harmful compounds in the body as it breaks down. 

Want something more traditional? Go old school and try seasoning with lard, but do not heat your cast iron over 375 degrees Fahrenheit to avoid oxidization.

What Oils Should I Not Use To Season My Cast Iron?

Any low smoke point oils, oils that taste odd at high temperatures, or strongly flavored oils are not ideal for seasoning cast iron. These oils tend to burn and degrade at elevated temperatures, resulting in a sticky or gummy residue.

The ones I avoid in particular are coconut oil, as it doesn’t bond with the cast iron properly, butter and olive oil, as they taste burnt, and flaxseed, as the smoke point is way too low and it can flake off. 

Why Do I Need To Season My Cast-Iron Skillet?

Cooking on unseasoned cast iron can result in sticking, rusting, and many other issues. It will eventually lose its sheen and non-stick powers. Seasoning your cast iron makes it more durable and more able to produce heat. 

Creating Your Own Seasoning Paste!

1. Fill a pot or pan with water to a height of 1 to 2 inches.
2. Set the pot on the stove and heat it until the water starts boiling. Once it has reached boiling point, take the pot off the stove.
3. Now, get a 4-ounce jar and fill it 3/4 with 2 tablespoons of beeswax pellets and 1/3 cup of your chosen oil.
4. Place this jar into the previously heated pot of water. This will cause the beeswax and the oil to melt and merge, creating your seasoning paste.
5. Ensure that you stir this mixture to help the ingredients mix well. If required, you can put the pot back on the stove.
6. After the ingredients have melted and mixed, let the mixture cool down. As it cools, the mixture will turn into a solid mass.
7. Use a rag to apply it to your cast iron cookware whenever needed.

How To Season Your Cast-Iron With Your Chosen Oil

To season your cast iron pan: 

1. Begin by washing it thoroughly.
2. Take a paper towel or rag and lightly coat the entire pan with oil. Make sure to include the bottom and handle of the pan.
3. After applying the oil, use a clean paper towel or rag to wipe away any excess oil from the pan. Ensure no pooling oil is visible, and the pan should feel practically dry to the touch.
4. Place the cast iron upside down in the oven and bake at 350 degrees for one hour.
5. Turn off the oven, but do not remove the pan. Let it cool down inside the oven.
6. If your pan was unseasoned or stripped, you may need to repeat these steps until the desired seasoning level is achieved.

Common Mistakes When Seasoning Cast-Iron

• Some people say you should heat the pan on the stove to season it. But this can make some parts hot and others cool, so it doesn’t season evenly.
• If your pan’s seasoning feels sticky, it means there’s too much oil.
• If you want to season your pan, wash it first. Then, dry it completely before you put the oil on. If you leave wet spots, the seasoning will be patchy.
• If you bake too much oil into the cast iron, it won’t set evenly and might peel off.
• Saturated fats are good for cooking but not for seasoning cast iron pans. With less saturated fat, the oil can stick to the metal better and make a lasting layer of seasoning.

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