Why Did My Cast Iron Skillet Catch Fire? Causes and What to Do

The cast iron itself didn’t catch fire. The oil, fat or food residue on it did. That usually happens when an empty or lightly oiled skillet is left on high heat until the oil goes past its smoke point and ignites, when fat spatters or drips into a gas flame, or when too much oil is used for seasoning in the oven. If it happens again: turn off the heat, slide a metal lid or baking sheet over the pan, leave it covered until cool, and never use water.

Common Causes at a Glance

Why Oil Catches Fire

Every oil has a smoke point, where it starts to break down and smoke. Refined oils like avocado, peanut or canola have higher smoke points than unrefined oils or butter. Keep heating past that, and the oil reaches its flash point, where its vapors can ignite if a flame or spark is near. Heat it further still and it can ignite on its own. Cast iron holds heat very well, so once it is very hot it stays hot even after you turn the burner down. That is why a smoking skillet should be taken seriously.

The key warning sign is heavy, continuous smoke. A wisp of smoke when you add oil to a preheated pan is normal. Thick smoke means the oil is overheating and it is time to turn the heat down or move the pan off the burner.

The Most Common Mistakes

1. Preheating on high and leaving the pan

Cast iron heats slowly and then gets very hot. Many people turn the burner to high, walk away, and come back to a smoking pan. Preheat on medium for 3 to 5 minutes instead. It will still get hot enough to sear.

2. Spatter reaching the flame

Wet meat, fatty cuts and lots of oil spatter. On a gas stove, droplets can land in the flame and flare up, and the flare can ignite the fat around the rim. Pat food dry, use a splatter screen, and keep the oil level modest.

3. Too much oil when seasoning

Oven seasoning only needs a very thin layer. A pan dripping with oil at 450 to 500°F will smoke heavily and can flare in the oven. Rub the oil on, then wipe it off until the pan looks almost dry, and bake it upside down with foil on the rack below. Our guide on how to season a cast iron skillet shows the right amount.

4. Built-up grease on the outside

Old grease and carbon on the base and sides of the pan can smoke and burn when the pan sits over a flame. Scrub the outside occasionally, not just the cooking surface.

5. Deep frying in a shallow skillet

Skillets have low sides, so deep oil is easy to splash or boil over. For deep frying, use a deep pot or Dutch oven, fill it no more than halfway, and keep the oil around 350 to 375°F with a thermometer.

6. Flammable items nearby

Paper towels, oven mitts, packaging and wooden spoon handles can catch if they touch the burner or a very hot pan. Keep a clear zone around the stove.

What to Do If Your Cast Iron Skillet Catches Fire

1. Turn off the heat if you can reach the control safely.
2. Cover it. Slide a metal lid or a baking sheet over the pan from the side. This cuts off oxygen.
3. Leave it where it is. Don’t carry a burning pan, which can spill burning oil.
4. Keep it covered until the pan has cooled completely. Lifting the lid early can let it reignite.
5. For a small fire you can also pour on a large amount of baking soda or salt. Never use flour or sugar.
6. If it isn’t going out, use a fire extinguisher rated for kitchen or grease fires (Class K or ABC/BC), aiming at the base of the fire. If the fire spreads, get everyone out and call emergency services.

Never pour water on an oil fire. Water sinks, turns to steam instantly and throws burning oil out of the pan.

Is the Skillet Still Safe After a Fire?

Usually yes. Cast iron can survive very high temperatures. The seasoning may be burned off or blotchy, and there may be sticky or flaky residue. Once it is cool, scrub it, wash it, dry it on the stove and re-season it. Retire the pan only if it is cracked or badly warped. If it starts to rust afterwards, see why a cast iron skillet rusts.

How to Cook Safely With Cast Iron

• Preheat on medium, not high.
• Use oils suited to the heat, such as avocado, peanut or refined canola for searing.
• Add oil just before the food, rather than heating oil alone for a long time.
• Stay at the stove while cooking with oil.
• Keep a metal lid or baking sheet within reach, and a kitchen fire extinguisher nearby.
• Point the handle inward, away from the edge of the stove.

Frequently Asked Questions

Can cast iron itself catch fire?

No. Iron does not burn in a kitchen. What burns is the oil, fat, food or old grease on the pan.

Why does my cast iron smoke so much?

Too much heat, too much oil, or burnt residue. Lower the heat and clean the pan. Our guide on why a cast iron skillet smokes covers the details.

Is it normal for my skillet to smoke while seasoning?

A little smoke is normal. Heavy smoke or flames mean there is too much oil. Turn off the oven, keep the door closed, and wipe off more oil next time.

Should I use water to put out a small pan fire?

Never. Cover the pan, or smother it with baking soda or salt, and turn off the heat.

Can I still cook in a skillet that caught fire?

Yes, after you clean it and re-season it, as long as it is not cracked or warped.

Final Thoughts

A cast iron fire almost always comes from overheated oil or fat, not the pan. Preheat on medium, use only as much oil as you need, keep the pan clean inside and out, and stay at the stove. Keep a metal lid close by, and if flames appear, cover the pan, turn off the heat and never use water.