You’ve probably inherited some cast iron wisdom from your grandmother or picked up advice from that friend who swears their skillet is indestructible. Thing is, a lot of what people believe about cast iron seasoning is just plain wrong. Some of these myths have been passed down for generations, but they’re actually ruining your pans instead of helping them. Let’s be real, the cast iron world is full of conflicting advice that can make even experienced cooks second-guess themselves. What if the method you’ve been using all along is actually working against you?
Using Bacon Grease to Break In Your Pan
Cooking bacon to break in a new cast iron skillet is a popular misconception, since most bacon has added sugars that will leave your skillet sticky and messy. Honestly, this surprised me when I first learned it. While bacon grease and lard were traditional options and may have made food tasty, they weren’t the reason Grandma’s pan was well-seasoned, and animal-derived fats are high in saturated fats and low in polyunsaturated fats, a mix that won’t easily produce resilient seasoning.
The problem is that those sugars caramelize and create a gunky residue that mimics seasoning but actually prevents proper polymerization. While lard was traditionally used to season cast iron, it’s only advisable if you frequently use your cookware, as it can go rancid if stored too long. Try cooking cornbread or sautéed vegetables instead for your first few uses.
Choosing the Wrong Oil for Seasoning
Extra virgin olive oil has a relatively low smoke point, so heating it to higher temperatures will cause it to break down and turn rancid, and while refined olive oil versions exist, there are still better options, making olive oil not recommended for seasoning cast iron. Here’s the thing: you need an oil that can handle serious heat without breaking down. The most effective temperatures for seasoning cast iron are between 400 to 500 degrees, so you need an oil with a high smoke point to withstand those temperatures.
Grapeseed oil is a new favorite seasoning oil that produced the most impressive seasoning results, creating an incredibly smooth and quite nonstick surface right from the get-go. Avocado oil has one of the highest smoke points at around 520 degrees Fahrenheit of all cooking oils, making it an excellent choice for seasoning cast iron. The key is looking for oils high in polyunsaturated fats, which polymerize more effectively than saturated fats.
Applying Too Much Oil During the Seasoning Process
I know it sounds crazy, but more oil isn’t better when seasoning cast iron. The pan should be coated in a thin layer of selected oil with a paper towel and wiped off with another clean paper towel, to the point where you couldn’t tell it had been oiled because the coat was so thin. This is where most people mess up. They slather on the oil thinking it’ll create a better coating, then wonder why their pan ends up sticky and blotchy instead of smooth and slick.
You need to apply very thin layers of whichever oil you choose, and heat your pan past the oil’s smoke point. The excess oil doesn’t polymerize properly. It just sits there getting tacky and attracting dust. Think of it like painting a wall – thin, even coats work better than one thick goopy layer.
Skipping the Proper Temperature and Time
It’s important to make sure you heat up your pan to that oil’s smoke point, because when the oil hits that smoke point, a chemical reaction called polymerization occurs, bonding the oil to your pan to create a layer of natural seasoning. Roughly about half of home cooks don’t heat their pans long enough or hot enough for this magic to happen. You can’t just warm up the pan for twenty minutes and call it done.
Preheat the oven to 450 degrees Fahrenheit and place the pan in the preheated oven upside down for one hour, then remove the pan after an hour and let it cool for at least fifteen minutes, repeating these steps at least four times that same day. Yeah, it’s time-consuming. The entire process takes roughly five to six hours, though very little of that is hands-on time. Still, skipping these steps means you’ll end up with weak, patchy seasoning that flakes off the first time you cook something acidic.
Believing Seasoning Is a One-Time Thing
Most cast iron pans sold today are pre-treated with a layer of oil already baked to the surface for easy cooking, but that doesn’t mean you can continue to cook with the pan indefinitely, because seasoning has to be maintained and re-seasoning the skillet is an essential step in cast iron maintenance. Let’s be real, I thought my pre-seasoned pan would last forever without extra work. Turns out that’s not how it works at all.
Simply using your cast iron to cook frequently with some kind of fat or oil will maintain the seasoning. Every time you cook with oil and heat, you’re essentially re-seasoning your pan in tiny increments. The vast majority of cast iron problems come from people thinking the initial factory seasoning is all they’ll ever need. It’s hard to say for sure, but maintaining your seasoning is probably easier than fixing a neglected pan later.
What do you think about these cast iron myths? Have you been making any of these mistakes with your own skillets?
