My grandma walked into the kitchen, took one look at my cast iron pan, and nearly dropped the dish towel in her hands. I was cooking tomato sauce in it, completely unaware I was doing something wrong. She shook her head and said, “That pan has rules, sweetheart.” Then she sat me down and explained the three things you should never cook in cast iron if you want it to last for years.
First, highly acidic foods like tomatoes, lemon sauce, or vinegar-heavy dishes can strip away the seasoning. That protective layer gives cast iron its nonstick surface, and acidic ingredients can leave the food tasting metallic too.
Second, delicate fish is usually a bad idea. Thin fish fillets tend to stick badly unless the pan is perfectly seasoned and extremely hot. My grandma said it turns dinner into “fish-flavored scrambled mess.”
Third, never leave wet foods sitting in the pan for hours. Soups, beans, or leftovers stored overnight can cause rust surprisingly fast. Cast iron loves to stay dry and well-oiled.
After her lesson, she showed me how to clean the pan properly with hot water, coarse salt, and a light coat of oil. Now every time I cook with it, I think of her standing in my kitchen, protecting that pan like it was a family heirloom.
