Warm a cast-iron skillet gradually over moderate heat, then add the appropriate amount of cooking fat. Very high heat and an oily pan can produce smoke before the food is ready.
Start with a clean, dry skillet
Check for old burnt residue or a thick sticky coating of oil, which can smoke when heated. Put the skillet on a suitable burner and begin at low to medium heat.
Allow time for the iron to heat
Cast iron holds heat but warms relatively slowly. Give it several minutes at a moderate setting, then check with a cautious food test or the recipe’s method. Do not touch the surface to judge temperature.
Add oil carefully
Choose a cooking fat suited to the temperature, add only as much as the recipe needs and distribute it across the surface. Keep good ventilation and lower the heat if you see smoke. Overheated oil can ignite, so never leave the pan unattended.
Understand smoke and searing
Some browning methods run hot, but an enclosed room filled with smoke is not a goal. For steaks and other seared foods, follow a safe recipe and use an appropriate ventilated setup.
Frequently asked questions
Does cast iron have to be smoking hot?
No. Many dishes, especially eggs and pancakes, benefit from medium or lower heat.
Can I heat an empty cast-iron skillet?
Yes for a short controlled preheat on a suitable burner, but never leave it unattended.
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