Emily ParkerBy Emily Parker

Updated November 2026

Cooking a cast iron skillet filet mignon gives you a deep, even crust and a juicy center that is hard to match on a grill for a steak this thick. The method takes about 20 minutes from fridge to plate. You will sear the steak hard, finish it gently in the oven, and rest it before slicing.

Choose the Right Steak and Skillet

Look for a center-cut filet at least 1.5 inches thick, which is what most butchers mean by a standard filet mignon. Thin medallions cook through before they brown, so pick the thicker cut. Pat the steak dry with paper towels and season it with coarse kosher salt and black pepper about 40 minutes before cooking, or the night before if you have time.

Shopping for one? See our guide: Lodge Cast Iron Skillet Review: Pros and Cons.

A 10- to 12-inch skillet works well for one or two filets. Make sure the pan is well seasoned and free of loose rust or sticky residue, since both can ruin the crust. If you need to refresh the surface first, see How to Season Cast Iron Skillet: 6 Steps for a Slick, Durable Pan.

How to Cook Filet Mignon in a Cast Iron Skillet

Heat the skillet over medium-high for about 5 minutes until it is very hot. A drop of water should sizzle and vanish. Add one tablespoon of a high-smoke-point oil such as avocado or grapeseed oil, then lay the steak down away from you so the oil does not splash.

Sear Both Sides

Leave the steak alone for 3 to 4 minutes until a dark brown crust forms and the steak releases easily from the pan. Flip it once and sear the second side for another 2 to 3 minutes. Add a tablespoon of butter, a crushed garlic clove, and a sprig of thyme in the last minute, and spoon the foaming butter over the steak.

Finish in the Oven

Move the skillet to a 400°F oven and cook until the internal temperature reaches your target. For medium-rare, pull the steak at 125°F; for medium, at 135°F. Expect roughly 5 to 8 minutes for a 1.5-inch steak, depending on your oven. Use an instant-read thermometer, not the color of the meat, to judge doneness.

Rest, Slice, and Serve

Transfer the steak to a cutting board and rest it for 5 minutes. The internal temperature will climb a few degrees during this time. Resting lets the juices settle so they stay in the meat instead of running onto the board.

Slice across the grain if you want a tender bite, or serve it whole. Then turn off the heat and let the skillet cool before cleaning it. For a quick routine, follow How to Clean a Cast Iron Skillet: 5 Steps That Protect the Seasoning.

Checklist: What You Need

  • One 1.5-inch-thick center-cut filet mignon per person
  • Coarse kosher salt and freshly ground black pepper
  • A 10- to 12-inch cast iron skillet
  • High-smoke-point oil such as avocado or grapeseed
  • Butter, garlic, and thyme for basting
  • An instant-read thermometer
  • Tongs and a heatproof handle cover or oven mitt

Common Mistakes to Avoid

  • Cooking a cold steak straight from the fridge, which causes uneven cooking.
  • Crowding the pan, which lowers the temperature and steams the meat.
  • Moving the steak constantly, which prevents a crust from forming.
  • Skipping the rest, which lets juices spill out when you cut.
  • Using a skillet with flaky or sticky seasoning, which causes sticking.

A reliable instant-read thermometer takes the guesswork out of doneness, which matters with an expensive cut. View on Amazon

A heavy 10-inch cast iron skillet holds heat well for a hard sear. View on Amazon

Heatproof silicone handle covers protect your hands when moving a hot pan to the oven. View on Amazon

FAQ

Can I cook filet mignon in a cast iron skillet without an oven?

Yes, you can finish it on the stovetop by lowering the heat to medium-low and turning the steak every minute or so. Cover the pan loosely to help the center warm through. Check the temperature often because stovetop finishing can overcook the outside.

What is the best internal temperature for filet mignon?

Most cooks aim for 125°F for medium-rare and 135°F for medium. Pull the steak a few degrees early, since it will rise during resting. Follow USDA guidance if you are serving guests who are at higher risk from undercooked meat.

Why does my filet mignon stick to the skillet?

Sticking usually means the pan was not hot enough or the steak was moved too early. Let the crust form fully before flipping, and check that the seasoning is smooth and well bonded. For ongoing sticking problems, a professional cookware repair service can assess the pan.

Conclusion

A cast iron skillet filet mignon turns out a crust and center you can be proud of with only a few tools. Sear hard, finish in a hot oven, and rest the meat before cutting. With practice, you will know your skillet and your oven well enough to hit your target temperature every time.

Ready to choose one?

Emily Parker

About Emily Parker

Emily Parker is part of our editorial team and reviews and edits our cookware & knives guides, checking product details against manufacturer specifications and owner feedback.