Season the steaks generously with salt and pepper on both sides. Let them sit at room temperature for about 30 minutes before cooking.
In a large skillet, heat the olive oil over medium-high heat until shimmering.
Carefully add the steaks to the skillet and sear for 4-5 minutes without moving them, until a golden-brown crust forms.
Flip the steaks and add the butter, crushed garlic, and rosemary to the skillet. As the butter melts, use a spoon to baste the steaks with the melted butter for about 3-4 minutes for medium-rare, or longer for your desired doneness.
Remove the steaks from the skillet and let them rest on a cutting board for 5-10 minutes before slicing.
Serve the steaks with the garlic and herb butter drizzled on top.