• Home
  • >
  • Cast Iron
  • >
  • 15+ Best Oil For Seasoning Cast Iron [For Nonstick Surface]

What Is The Best Oil For Seasoning Cast Iron?

Despite the fact that it seems to be straightforward, seasoning cast iron is something that most people are apprehensive about trying for a variety of reasons.

Cast-iron cooking presents another issue for first-time cast-iron cooks: determining the optimum quantity of oil to use to season the iron before using it for cooking.

What Is the Best Oil for Seasoning Cast Iron

Consequently, we will discuss what kind of oil to use while seasoning cast iron, as well as what type of oil to avoid using.

What Is Seasoning Oil?

Using cast-iron seasoning oil to season your cast-iron cookware is a good idea when it comes to seasoning your cast-iron cookware.

Oils such as olive oil, grapeseed oil, flaxseed oil, soybean oil, maize oil, vegetable shortening, and lard, to name a few, are readily accessible.

Surface seasoning is required because it results in the formation of an imperceptible layer of polymerized fat on the surface, which serves to prevent adhesion and corrosion in the presence of moisture and other substances.

It is preferable to utilize oils with high smoking points, such as those used for seasoning cast iron, since they are capable of withstanding the high temperatures necessary for polymerization to occur.

Oils manufactured by cast-iron producers, such as seasoning oils and conditioners, are among the readily available oils. Oils such as grapeseed oil, flaxseed oil, vegetable oils, and canola oil are just a few of the options accessible to consumers today.

The smoking point of cast iron must be high for polymerization to take place, which is the process by which oil is baked into the surface of the cast iron.

It is as a consequence of this process that natural rusting of iron occurs, after which the iron is coated with a nonstick coating that prevents it from rusting.

What Is The Importance Of Seasoning Cast Iron?

Cast iron must be seasoned before it can be used to make a nonstick surface. Cast iron is seasoned by coating it with oil and baking it for many hours at a time. Using an oil coating on cast iron will help to prevent corrosion while also improving the nonstick surface of the cast iron cookware.

Additional to this, the oil coating generates a smooth surface as a result of the application of the coating. For cast iron to become nonstick after baking, several pits and fissures must be filled in the order to become nonstick after baking.

This is due to the spices that are utilized in the filling of these pits, which ensures that the cooking surface is dispersed more uniformly.

This should not be overlooked while making food in cast iron since everything cooked in it will absorb part of the flavors from the seasoning on the cast iron pan. Acidic foods such as tomatoes and wine, for example, can deplete the spice supply before its expiration period.

Despite the fact that it takes a bit longer to season cast-iron cookware the first time, we use it for practically every meal we make.

It is a rock in its own right, and it is as strong as one. You can expect your cast-iron things to endure for a very long time if they are properly maintained. They will almost likely outlive you and your children.

It has excellent heat conduction qualities. However, despite the fact that cast iron is slow to heat up, when correctly prepared, it is capable of reaching very high temperatures and maintaining them for a considerable period of time without melting.

It is a low-cost alternative. The bulk of cast-iron components, such as this cast iron skillet set, are of excellent quality while being reasonably priced, with individual pans ranging between $25 and $30 in price.

It aids in the more efficient absorption of iron by the body. We absorb a trace quantity of iron into the meals we cook in cast iron pans, despite the fact that the levels are insignificant. This increases our daily need for iron.

How Do You Season Cast Iron?

Before it can be seasoned, cast iron must be completely cleaned and dried before use. Make certain that the cast iron is completely clean and dry before beginning to season it.

After that, you may choose to apply a thin coating of oil to the surface of the iron if you choose, but only a thin layer should be applied. Inspect the container to ensure that the sealant has been applied to the bottom, lid, and handles, if applicable.

Make sure your oven is equipped with a tray or aluminum foil below the space designated for the iron before you begin using it. Insert a center oven rack into the cast-iron pan, which has been inverted, and bake for 30 minutes. Preheat the oven to 450 degrees Fahrenheit (180 degrees Celsius).

Preheat the iron for about one hour. Make certain that the oven has fully cooled before attempting a second baking session if required.

This should be repeated three to four more times to finish the seasoning process. This requires that the nonstick "Patina" is in full working condition to satisfy the criteria (surface).

If your dinner has been stuck, continue cooking until a glossy black sheen emerges on the surface of your meal. Unless your supper has been thrown away, one or two portions should be plenty.

Conserving and utilizing your cooking oil, which is made feasible by the use of a grease keeper, may help you save money on your cooling expenses.

What Are The Different Types Of Seasoning Oil?

What Are The Different Types Of Seasoning Oil?

The presence of food that sticks to the cast iron is a sign that the seasoning has deteriorated. As a result, food clings to the pores of ferrous sulfate due to a lack of adequate barrier protection.

As a consequence, the food is burned into the pores of the skin, resulting in a sticky mess on the ground. An extensive and time-consuming cleaning operation is required at this stage. After that, the property is subjected to a comprehensive re-seasoning process.

Seasoning oil is a rust-prevention oil that is applied to cast iron to prevent it from rusting. It is also known as seasoning paste.

Additionally, it is used to season cast iron because, over time, it creates a nonstick barrier, transforming the cast iron into a nonstick pan that is more durable than the original cast iron.

Cold Pressed Oil

The mechanical extraction of oil from seeds culminates in the manufacture of pressed oils, which are refined oils that have been pressed.

A high-quality plant fat is produced as a result of this process, which has been stabilized against oxidation to extend its shelf life while maintaining its freshness and taste without becoming rancid.

This plant fat is cholesterol-free and has been stabilized against oxidation to ensure that it does not become rancid.

Unrefined And Refined Oils

Unrefined oils and refined oils are the two kinds of oils that are often used in cooking and flavoring. Unrefined oils are more expensive than refined oils.

In contrast to crude oil, which is only filtered to remove bigger particles from the mixture, refined oil is filtered extensively to eliminate even the tiniest of particles from the mixture.

Saturated And Unsaturated Fats

Saturated fats such as lard, suet, bovine tallow, and sheep fat are among the most often used. Unlike saturated fat, which is solid at room temperature, unsaturated fat, which is liquid at room temperature, is found in margarine and spreads made from vegetable oils.

It is advisable to utilize unsaturated fats while cooking with oils rather than saturated fats. These seasonings are more reactive and polymerize more quickly when they are used to season food!

When seasoning or preserving cast iron, unsaturated fats polymerize more readily than saturated fats, a phenomenon known as polymerization.

Monounsaturated And Polyunsaturated Fats

Due to the presence of a single double bond, monounsaturated fats are more stable than polyunsaturated and saturated fats.

Polyunsaturated fats and saturated fats are less stable than monounsaturated fats. Polyunsaturated fatty acids with up to six double bonds are more prevalent in cast iron protective coatings, which results in a more effective and long-lasting protective coating for cast iron.

Should You Use Seasoning Cast Iron Every Time You Cook?

Cast-iron cookware does not need seasoning after each use since it is self-seasoning by nature. Provide a thorough seasoning to your cast iron skillet before using it for the first time.

Reseason the food with salt and pepper if the bottom of the pot, pan, or skillet begins to stick to the food. Alternatively, if you detect a dulling of the Patina, it is recommended that it be replaced.

Once cast iron has been put out to season for an extended time, there is no limit to how long it may be used. When it becomes dull and food begins to adhere to it, just season it with salt and pepper to restore its luster.

What Is The Best Oil For Seasoning Cast Iron?

Several individuals use a range of oils, regardless of whether or not they are recommended for properly seasoning cast iron pans.

Vegetable oil, animal fat oil, dairy oil, industrial seasoning, and minerals oils are just a few of the many types of oils available.

When it comes to seasoning your cast-iron skillet, choosing the proper cooking oil may be challenging since there are hundreds of different high-quality cooking oils available on the market.

The following is an in-depth guide to seasoning oil so that you can learn about the pros and cons of each kind of oil and get started seasoning your favorite cast-iron recipes right now!

There are many different kinds of oil that you can use to season cast iron, but we shall break down some of our favorites here.

Grapeseed Oil

The finest oil to use for seasoning cast iron skillets is grapeseed oil. Although grapeseed oil is pricey, I've seen that it's becoming more available and affordable.

What is the advantage of seasoning cast iron using grapeseed oil? With a smoke point of 480 degrees Fahrenheit, grapeseed oil is very stable (250 degrees Celsius).

However, considerable caution should be used when the terms "cold-pressed" and "virgin" are used, since these terms refer to oils that have been purposefully created for use in "gourmet" sauces, desserts, and other meals of the same class. They use far less energy than conventional fuels.

Flaxseed Oil

Another option is to use flaxseed oil for olive oil as a seasoning oil. To ensure the safety of nut or vegetable oils before they are utilized in culinary applications, they must be filtered and refined.

Due to their smoke point of 225 degrees Fahrenheit (107 degrees Celsius), which is lower than the temperature at which they burn, flaxseed oils are classed as low-temperature oils.

Most importantly, if the residual oil is not used soon, it will swiftly degrade and should be disposed of safely.

Due to the drying nature of flax oil, it is especially well-suited for seasoning cast iron skillets and skillets. Due to its high content of polyunsaturated lipids (68%) and unsaturated fats (86%), it is the ideal oil for flavoring your pan while cooking.


It is possible to heat refined corn oil to 450 degrees Fahrenheit or 235 degrees Celsius.

When heated to 320 degrees Fahrenheit or 160 degrees Celsius, this cold-pressed "virgin" and "unrefined" oil will not season cast iron, despite its claims.

Canola Oil (Rapeseed Oil)

It is very well suited for seasoning cast iron that will be stored for a lengthy period. Cast iron may be protected against corrosion by applying a resin coating to preserve it in excellent condition during storage.

It is also likely that the kitchen may smell significant after using this oil to season the meal that is being spiced with the oil in question.

Preheat the oven to around 250 degrees Fahrenheit for approximately 2 hours, or until the oven is hot to the touch. A little coating of oil should be applied to the iron using a soft cloth, and the iron should be baked for 45–1 hour at 350 degrees. After adding the sauce, cook for a minimum of another one minute on medium heat.

After the iron has been allowed to cool fully, thoroughly wash it off to remove any leftover residue before storing it.

Firstly, it must be brought down to room temperature before the oil may be heated to 400 degrees Fahrenheit (200 degrees Celsius). Warming temperature: 220°F (112°C). Cold pressing, "virgin" and "unrefined."

Vegetable Oil

Vegetable Oil

Vegetable oil is a wide phrase that encompasses a variety of oils, some of which are detailed below. Even while many people recommend using vegetable oil for seasoning, these oils have been heavily processed and may include several harmful compounds.

Canola oil and vegetable oil are quite similar in appearance, and the two are often used interchangeably in cooking and other applications.

Cast-iron pans seasoned with vegetable oil are a more cost-effective option than canola oil, but they will not provide the greatest results throughout the cooking process.

Safflower Oil

The temperature at which refined safflower oil may be heated is 510 degrees Fahrenheit (265 degrees Celsius).

Sunflower Oil

Cooking at temperatures as high as 450 degrees Fahrenheit (235 degrees Celsius) is achievable when using sunflower oils that have been processed and have a high concentration of oleic acid.

It is not recommended to season cast iron skillets with sunflower oils that are virgin or cold-pressed since the smoke point of these oils is quite low. According to the United States Department of Agriculture, sunflower oil is more sensitive to oxidation than either olive oil or canola oil.

Olive Oil

Extra virgin olive oil has a smoking temperature of 410 degrees Fahrenheit (215 degrees Celsius) at which it begins to smoke (virgin olive oil). Violet and unpolished coffee beans are cold-pressed at 320 degrees Fahrenheit to get their distinctive flavors (160 degrees Celsius).

We do not recommend using olive oil for cooking because of its low smoking point. Oil, on the other hand, cannot be absorbed into the pores of cast iron because of the rapid oxidation of the metal.

Following a thorough seasoning of your cast-iron pan, using this oil to cook with is a wonderful experience! It will help to keep the "Patina" on your irons for a longer time.

Bacon Grease

This oil has a smoke point of 360 degrees Fahrenheit, which is fairly high for an oil of this kind and composition (185 degrees Celsius). Adding bacon grease to the cast iron skillet is accomplished by rubbing a fatty piece of bacon over the surface of the skillet surface.

Moving the bacon to the iron is going to be tough because the oil will not be distributed uniformly over the whole surface of the bacon. This means you won't be able to season the iron to its full potential.

According to some, the salt included in bacon fat is responsible for the pitting of the iron in the pan.


Fat must be heated to a temperature of 360 degrees Fahrenheit (185 degrees Celsius) before it may begin to smoke.

When the lard is applied hot and in high amounts, it can infiltrate the pores of the iron and cause corrosion. Aside from that, as previously said, it is a great tool for repairing damaged cast iron cookware.

Coconut Oil

This procedure is deemed effective when refined (pure) oil is heated to 450 degrees Fahrenheit (232 degrees Celsius).

The high oxidation factor of coconut oil makes it far more durable than beef tallow when used as a frying oil. This is although coconut oil has a lower oxidation factor.

The fact that virgin oil must be kept at temperatures below 350 degrees Fahrenheit/175 degrees Celsius makes it imperative that you take care while purchasing this product.

At first look, it may seem like seasoning cast iron with coconut oil is a fantastic idea; however, there are a variety of better oils to pick from instead.

We use coconut oil in everything from pastries to Thai-style curries, and we even include it into our body lotion. There is no doubting the health benefits of virgin coconut oil, however, it is not recommended to season cast-iron pans with coconut oil due to the high saturated fat content.

Peanut Oil

Food is seared and stir-fried in peanut oil at high temperatures, preserving the flavor of the oil while retaining its nutritional value. This is 450 degrees Fahrenheit (235 degrees Celsius), which is the smoking point.

We feel that peanut oil, despite the fact that it is often used in stir-frying and Asian cuisine, does not make for the best seasoning for cast iron because of its strong peanut flavor, which does not usually blend well with other dishes.

Almond Oil

This oil can help to prolong the life of the finish on your cast iron cookware by protecting it from oxidation. However, you are far more likely to come across "raw" oil, which, like many other nut oils, cannot be cooked at high temperatures and must, as a result, be eaten immediately after purchase.

Walnut Oil

It is inadequate for seasoning cast iron, although it has a smoke point of 400 degrees Fahrenheit (204 degrees Celsius). However, if you can get your hands on some 100 percent refined walnut oil, you should give it a go!

The most generally accessible kind is unrefined walnut oil, which may be used for low-temperature frying but is most often seen in salad dressings.

Animal Fats

We can only infer that our forebears made their cast iron entirely from animal fats since they did not have access to genetically modified foods at the time of their invention.

It is still in use by a significant number of people all over the globe, even though this cookware is still readily available in a variety of forms.

Please remember that it is possible that the food you are eating is not kosher! As a result, if you are preparing meals for a group of people, this is an important factor to consider when cooking.


Cooking using butter in a low heat setting will provide the greatest results. Whole butter comprises oils formed during the churning process, which are derived from the cream. Whole butter contains saturated fats and milk protein in addition to other nutrients.

Butter may get brown and ultimately burn if it is cooked to an excessive temperature. As a result, you would have a seasoning that was bitter on your hands.

As a consequence, due to its inability to endure the high temperatures required for seasoning cast iron, this technique of seasoning is no longer advised for use.

What Is The Importance Of Seasoning Oils Smoking Point?

What Is The Importance Of Seasoning Oils Smoking Point?

The oil must be heated to its smoking point before polymerizing and producing a protective coating on the surface of the cast iron cookware to effectively preserve it.

The smoking point of the oil you're using must be known if you want to get the most out of this method since it will allow you to maximize the efficiency with which your pan is heated.

Lightened, virgin, and unprocessed oils all have a lower smoke point than conventional oils, which makes them ideal for frying. The majority of essential oils that are now commercially available are not in their purest form. They are the ones who quickly deteriorate since they have been altered.

Your understanding of the many types of oils available, as well as what is required to ensure that your cast iron seasoning reaches the "Patina" stage of growth, should have improved by this point (its smooth shiny non-stick surface).

Final Thoughts

Others assert that since vegetable oils are more liquid than animal fats, they are more able to penetrate the pores of cast iron than animal fats.

Because pure versions of these oils are difficult to come by, I would advise avoiding using them unless necessary. You should use pure oil instead unless you have access to it on hand.

As a consequence of genetic alteration, a substantial number of individuals who previously used Crisco have now shifted to more natural, unaffected oils as a result of this. Coconut oil, which I use as olive oil for seasoning cast iron, is my favorite vegetable or nut oil for this purpose.

It is recommended that you season your cast iron skillet using vegetable oil if you can acquire a pure vegetable oil that is capable of withstanding high temperatures. Canola oil is often recognized as the second-best vegetable oil after olive oil in terms of quality.

A significant amount of time has passed since cast iron was first used in construction. It is unlikely that our forefathers would have had access to vegetable oils, nut oils, or other equivalent products.

It is likely they would have used a cast iron skillet that was completely unseasoned. Cast iron cookware would have seasoned itself as a result of the regular usage of cast iron.

Frequently Asked Questions

Get your last-minute questions answered here! 

What Is The Best Oil For Seasoning Cast Iron?

Following completion of seasoning, add a little quantity of oil to the pan and heat it in the same manner as you would any other skillet.

The ideal cooking oil for the task is mostly decided by the kind of food being prepared as well as your tastes when it comes to cooking.

The smoke point is important to consider since a low smoke point oil may burn and release potentially harmful substances into the air when it is used in high-heat cooking.

The availability of cooking solutions that are safe for use in low-heat conditions is becoming more widespread.

How Often Should I Season My Cast Iron?

However, although the initial layer of seasoning acts as a starting point, and your seasoning will build and increase over time, a single application of seasoning may cause the meal to stick to the pan much too rapidly and burn.

Cooking with cast-iron cookware may be done with relative ease after the first coat of seasoning has been applied; there is no need to worry about over-seasoning your cast-iron cookware at this point.

As long as you use cast iron correctly, seasoning should not be necessary, while the seasoning will naturally collect as you prepare your meals in cast iron.

When a cast-iron skillet or pan begins to show signs of wear, such as rust spots or fading patina, it is time to replace the seasoning.

What Temperature Should I Season My Cast Iron At?

For your oil to fully react with your pan and form a smooth, nonstick coating, it must be heated to a high temperature.

Prepare a cast-iron pan that has been greased by preheating the oven to 450 degrees Fahrenheit and baking for 30 minutes.

Remove the pan from the heat and leave it in the oven to cool for a few minutes to allow the seasoning to develop more. Keep your hands away from the scorching cast-iron pan.

About the author 

Nate Lau

Nate is an aspiring chef, and father of two. He is always on the lookout to try new healthy recipes and kitchen gadgets. He has a passion for cooking delicious miso black cod and enjoys a nice sip of pinot on occasion.