Ingredients:
- 2 filet mignon steaks (6-8 oz / 170-225 g each, 1.5 inches / 4 cm thick), center-cut, tied (optional)
- 1 Tbsp kosher salt (about 15 g)
- 1 tsp freshly ground black pepper (coarsely ground)
- 2 Tbsp high-heat cooking oil (grapeseed, avocado, or refined canola)
- 4 Tbsp unsalted butter (1/2 stick, about 57 g), cut into four pieces
- 2 garlic cloves, smashed
- 4 sprigs fresh thyme (or substitute 2 sprigs fresh rosemary)
Instructions:
- Pat steaks thoroughly dry with paper towels and place on a wire rack over a plate. Let rest at room temperature for at least 30 minutes for even cooking.
- Preheat the oven to 400°F (200°C) while steaks come to temperature.
- Season both sides and edges of the steaks aggressively with kosher salt and freshly ground black pepper just before cooking.
- Place a heavy oven-safe skillet (cast iron recommended) on high heat and add the high-heat cooking oil. Heat until oil is shimmering and just beginning to smoke, about 2-3 minutes.
- Carefully place the steaks in the hot skillet and sear the first side undisturbed for about 2 minutes until a deep brown crust forms.
- Flip the steaks and sear the second side for 1.5–2 minutes. Use tongs to briefly sear the edges, about 30 seconds per edge.
- Immediately transfer the skillet to the preheated 400°F (200°C) oven and bake for approximately 4–6 minutes, depending on thickness and desired doneness.
- Remove the skillet from the oven, reduce hob heat to medium-low, and add the butter pieces, smashed garlic, and thyme sprigs to the pan.
- As the butter melts and foams, tilt the pan slightly and continuously spoon the foaming herb butter over the steaks for about 60 seconds to baste and add flavor.
- Insert an instant-read thermometer into the side of the thickest steak and remove from heat when the steak is 5°F (3°C) below your target serving temperature (e.g., remove at 125°F / 52°C for medium-rare to reach 130°F / 54°C).
- Transfer steaks immediately to a clean cutting board, tent loosely with foil, and let rest for a minimum of 10 minutes to allow juices to redistribute.
- Slice off butcher's twine if used, slice or serve whole, and spoon any resting juices or residual herb butter over the steaks before serving.