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Instructions:
- Remove the filet mignon from the refrigerator 30 minutes before cooking. Pat dry and season generously with salt and black pepper.
- Heat the olive oil in a cast-iron skillet over high heat until shimmering.
- Sear the filets for 3 to 4 minutes per side, until a deep golden crust forms.
- Add the butter to the skillet and baste the steaks for about 1 minute.
- Transfer the skillet to a 400°F (205°C) oven and cook for an additional 4 to 6 minutes for medium-rare, or to desired doneness. Remove and let rest.
- In a separate skillet, melt the butter over medium heat. Add the garlic and shallot and sauté until soft and fragrant.
- Stir in the spinach, heavy cream, and cream cheese, cooking until smooth and creamy.
- Add the Parmesan cheese, nutmeg, black pepper, and optional wine or Worcestershire sauce. Cook until thick and rich.
- Spoon generous amounts of the spinach Rockefeller topping over the rested filets and serve immediately.
Variations
- Substitute Gruyère for Parmesan for a deeper, nuttier flavor.
- Add finely chopped mushrooms to the spinach mixture for extra depth.
- Use fresh spinach sautéed and thoroughly drained instead of frozen.
- Finish the topped steaks under the broiler for a lightly browned crust.
Tips
- Always let steaks rest before topping to keep them juicy.
- Squeeze spinach extremely dry to avoid a watery topping.
- Use a meat thermometer for precision; 130°F (54°C) is ideal for medium-rare.
- Finish with a spoonful of sizzling butter just before serving for authentic steakhouse flavor.