5 Foods You Should Avoid Cooking in a Cast-Iron Skillet

A cast-iron skillet can serve you for decades if properly cared for. The key to maintaining it is the seasoning process, which may seem like a hassle but is essential for preserving your skillet. Regular seasoning not only extends its lifespan but also enhances its non-stick properties, making it easier to cook certain foods. If you've ever ruined an omelet or made a tomato-based sauce in a new cast-iron pan, don't worry — perfecting the seasoning takes time. Until then, here are some foods you should definitely steer clear of cooking in your cast-iron skillet.

Eggs

Because a new cast-iron skillet is highly porous, eggs are one of the worst foods to cook in it. Not only will your eggs cook unevenly, but you'll also find yourself scraping egg remnants off the bottom of the pan. However, once your skillet is seasoned properly over time, you'll be able to whip up perfectly fried eggs and fluffy frittatas, like this Zucchini Frittata With Parmesan.

Fish (certain types)

A good rule of thumb is to cook only thicker cuts of fish in a cast-iron skillet. Tuna, mahi-mahi, and swordfish steaks are excellent for searing and can handle the heat. More delicate fish like sole, cod, flounder, and even salmon may stick to the pan and create a mess. After cooking fish, be sure to deep clean and season your skillet, or your next dish might pick up that distinctive fishy flavor.

Desserts (if the skillet was used for dinner beforehand)

As mentioned earlier, cast-iron skillets and pans are highly porous, meaning they retain flavors unless thoroughly seasoned and cleaned. So while making a giant cookie skillet or brownies might sound irresistible, you should always ensure your pan is properly cleaned from any previous meal before using it to make dessert.

Acidic Foods

Cast-iron skillets and acidic foods don’t go well together, unless you’re in a rush. If you’re preparing a rich tomato sauce, wine-braised dishes, or a lemony marinade, you might want to choose a stainless steel or ceramic pot instead. Acidic foods can break down even the most seasoned cast-iron, causing metals to leach into your food.

Potent Ingredients

When cooking with your cast-iron skillet, it’s important to think about the ingredients you're using. Just because something doesn’t stick doesn’t mean it won’t leave lingering food smells in the pan, even after thorough seasoning. Spices with strong flavors like curry, chipotle, and cumin are best cooked in different cookware to save yourself from a cleaning headache.