Pat the steaks dry with paper towels. Season both sides with the salt and pepper. Let them sit at room temperature for 30 minutes.
Heat a large cast iron skillet over medium-high heat for 3–4 minutes, until very hot. Add the oil and swirl to coat.
Lay the steaks in the pan, away from you. Cook without moving for 3–4 minutes, until a deep brown crust forms.
Flip the steaks and cook for 2 minutes.
Reduce the heat to medium. Add the butter, garlic and herbs. When the butter foams, tilt the pan and spoon it over the steaks for 1–2 minutes, until they reach the temperature you like (see notes).
Move the steaks to a cutting board and rest for 5 minutes. Slice against the grain and spoon the garlic butter from the pan over the top.