My grandmother has always treated her cast iron pans like heirlooms.

To her, they weren’t just tools for cooking — they were vessels of memory, infused with decades of meals, laughter, and quiet moments around the table. Each skillet held a history, and she guarded them with the kind of reverence usually reserved for family photos or handwritten letters.

One afternoon, I decided to make dinner and reached for one of her pans, assuming I could cook anything in it. She walked into the kitchen, paused, and gave me a look — half amused, half alarmed.

“You can’t cook just anything in a cast iron pan,” she said gently.

I chuckled, but she didn’t let it go. She sat me down and began to explain.

Acidic foods, she told me — like tomato sauces — can strip away the seasoning she’d spent years nurturing. Delicate fish can cling and crumble, leaving behind a mess. And sweet dishes cooked in a pan seasoned for savory meals? They carry traces of flavors that don’t belong.