Cast iron pans are durable cooking tools made from molten iron poured into molds. They are known for their excellent heat retention and even cooking, making them ideal for frying, baking, and sautéing. With proper care, these pans can last a lifetime and even improve with age, developing a natural non-stick surface. To maintain a cast iron pan, it is essential to season it regularly by applying a thin layer of oil and heating it. This process helps prevent rust and enhances the pan's non-stick properties. They are versatile and can be used on the stovetop, in the oven, or even over an open flame.