Boiling water in cast iron isn't inherently destructive, but it is not recommended for extended periods (like boiling pasta or cooking dry beans). Prolonged, intense boiling can loosen or strip the protective seasoning layer. However, bringing water to a brief boil is totally safe.
Yes, but only for brief periods. It is safe to boil water to lift stuck-on food, but boiling for extended periods can weaken or strip the seasoning. If you must boil water or make water-based dishes, simply wipe the pan dry and apply a light coat of oil afterward.
Yes, cooking with cast iron pans can contribute to high ferritin levels. While safe for most people, the iron in the pan transfers into your food, and your body absorbs it. This effect is particularly significant for individuals with underlying genetic conditions or those who frequently eat acidic foods.
Yes, you can absolutely use Dawn dish soap on cast iron.
4 Foods You Should Avoid Cooking In A Cast-Iron Skillet
Yes, you absolutely use oil in a cast iron skillet. It is essential for cooking to prevent sticking and for maintaining the protective, non-stick "seasoning" layer. High smoke point oils like vegetable, canola, or grapeseed oil are ideal for cooking and seasoning.
The healthiest skillet to use is one free from toxic coatings like Teflon (PTFE) and harmful forever chemicals (PFAS/PFOA). Cast iron, carbon steel, and stainless steel are universally regarded as the safest, longest-lasting options, while ceramic-coated pans provide an easy-release alternative without the plastics.
A cast iron skillet is ruined primarily by rust from soaking or improper drying, warping from extreme thermal shock (like cold water on a hot pan), or cracking if dropped. While most seasoning issues are reversible, letting rust cause deep pitting, or fracturing the iron, destroys the cookware permanently.
The easiest way to clean a cast iron skillet is to wash it while it's still warm using hot water, a mild dish soap, and a scrub sponge. Dry it completely on the stovetop, then rub a very thin layer of neutral cooking oil over the entire surface before storing.
Any food-safe cooking oil or shortening will work, but our Test Kitchen experts prefer vegetable oil or canola oil. WHAT'S THIS DARK RESIDUE I SEE WHEN I CLEAN MY CAST IRON? Occasionally, you may notice some dark residue on your paper towel or cloth while cleaning it.
These are the most common symptoms in the first 6 hours after ingestion.
Lodge cast iron includes a Prop 65 warning primarily out of an abundance of caution to comply with California's strict labeling laws. Because trace, naturally occurring elements (like manganese) can be present during the iron-casting process, the company uses the warning to avoid legal penalties in California, even if the products meet all federal safety guidelines.
For healthy individuals, it is highly unlikely to get iron poisoning from cast iron pans. While the cookware does transfer small amounts of dietary iron into food, the amount is usually small enough to be safe or even beneficial for preventing iron-deficiency anemia.
Spores from bacteria like Clostridium botulinum, Bacillus anthracis (anthrax), and certain Bacillus cereus strains cannot be killed by simple boiling (100∘𝐶 / 212∘𝐹). While boiling kills most waterborne bacteria, these spore-formers survive in a dormant state and can germinate later, requiring pressure canning (above 121∘𝐶) to eliminate.
You can technically boil pasta in a cast-iron pan, but it is not recommended. Prolonged boiling can break down your pan's protective seasoning, causing it to flake off into your food. Instead of a rolling boil, you can use the skillet method, where pasta cooks in a smaller amount of simmering liquid that it absorbs.
Instead, Amidor recommends “cooking with cast iron once or twice a week, especially if someone has iron-deficiency anemia and no issues with too much iron in their diet.” Preparing a more acidic dish, or something with a lot of moisture, is likely to absorb more iron from your pot or pan.
Mistake 3: Soaking the Pan in Water
Cast iron rusts when exposed to moisture for long periods. A water soak can undo months of seasoning and require a full restoration. Wash quickly with warm water and a soft brush while the pan is still warm. Dry it immediately on low heat until all moisture evaporates.
Yes, you can absolutely just wipe out your cast iron skillet with a paper towel if you only cooked something simple or left very little residue. The hardened, polymerized oil coating (the seasoning) is tough. However, to maintain a sanitary cooking surface, you must wash the pan with water and a little dish soap if food residue or strong flavors are left behind.
Yes, you can absolutely use Dawn dish soap on cast iron.
What Not to Cook in a Cast-Iron Skillet
Cast iron skillets can last a lifetime—and even last for generations when cared for properly. Because they are built from a single, durable piece of metal, they do not wear out like traditional non-stick pans. Even if a pan develops rust or loses its seasoning, it can almost always be stripped down and restored.
Avoid traditional non-stick pans with worn coatings or synthetic "forever chemicals" (PFAS), as well as unlined copper and reactive aluminum. Scratched or overheated pans release toxic fumes or leach heavy metals into your food.
The healthiest pans to cook with are made from cast iron, carbon steel, stainless steel, or pure ceramic. These materials are free from toxic synthetic coatings (like PFAS and Teflon) and will not leach harmful chemicals or microplastics into your food when heated.
The difference between cast iron and iron is that cast iron is preferable for thorough cooking and heat retention and has non-stick properties when seasoned properly.