Why your cast iron skillet sticks

A camper put the problem more plainly than any care guide: “I am tired of burning and scouring my pans with eggs!!”

That sentence is the whole cast-iron experience in one line. The pan is not broken. The technique is. And the technique is not obvious, because cast iron is sold with a mythology — “it’s naturally nonstick once seasoned” — that sets people up to fail on the first egg.

Here is the short version, then the nuance.

The short answer

Cast iron is not nonstick. It is a hot, oiled piece of iron. When it releases an egg, it is because the pan is hot enough, the oil is hot, the egg is dry and the seasoning is intact. When it sticks, one of those four things is off.

The most common mistake is not “bad seasoning.” It is adding food to a pan that is not hot enough yet. The second most common is wet food — a cold egg, a damp piece of fish, a chicken thigh straight from the fridge — hitting the pan before the surface has recovered.

What the reviews say (and why the number surprises people)

In our comparison of 6,212 cast-iron reviews and 17,735 PTFE-coated reviews, cast iron mentions food sticking in 0.14% of reviews; PTFE mentions it in 0.29% — 2.0×, or 0.15 percentage points in absolute terms.

That does not mean cast iron is twice as nonstick. It means:

• PTFE users are promised a nonstick surface, so a failure is more likely to be written as a complaint.
• Cast iron users expect some sticking and may not review it.
• The comparison is not a lab test; it is a difference in what people report.

The useful takeaway is narrower: cast iron is not uniquely sticky. If your pan is sticking badly, the cause is usually technique, not the material.

The technique that actually works

The forum mantra is “hot pan, cold oil.” A more precise version:

1. Preheat the pan dry over medium heat for a few minutes. It should feel hot to a hovered hand, not scorching.
2. Add oil — enough to coat the surface, not a puddle.
3. Wait until the oil shimmers and moves easily.
4. Add dry food. Pat the egg, fish or meat dry; wet food steams and sticks.
5. Leave it alone. Food releases when a crust forms. If you poke it too early, it tears.
6. Use a thin metal spatula to get under the edge; cast iron tolerates it.

If the egg still sticks, the pan was not hot enough, or the seasoning is compromised. Scrub it out, dry it, oil it thinly, and heat it until it just smokes; repeat once or twice. Do not baby it.

The seasoning myth

Seasoning is polymerized oil, not a permanent coating. It builds in thin layers and wears with acid, soap, scraping and time. A pan that has been “ruined” by a stuck egg is usually a pan that needs another layer, not a new pan.

The forum advice about never cooking meat or milk in a pan used for eggs is folk wisdom, not a rule. The more reliable rule is simpler: clean it, dry it, oil it, heat it after any sticky cook.

What we would do

• Keep a cast iron for searing, frying and anything that benefits from heat retention.
• Keep a small nonstick pan for eggs if you cook eggs often; it is the right tool for a low-fat, delicate cook.
• Do not try to make one pan do both jobs. The pans are not competing; they are different tools.
• If you buy a new cast iron, cook bacon or fry potatoes a few times before the first egg. It is not superstition; it is seasoning.

What this does not tell you

We did not test your pan. The 0.14% figure is a share of reviews that mention sticking, not a measured failure rate, and the cast-iron and PTFE groups are different users with different expectations. A warped, pitted or badly cast pan will stick no matter how good your technique is. If the surface is damaged, the answer is a new pan, not more oil.

The data can tell you the complaint is not unique to cast iron. It cannot teach your wrist when the pan is ready. That part is practice.