Remove the steak from the refrigerator and let it sit at room temperature for about 30 minutes before cooking. This helps it cook evenly.
Pat the steak dry with paper towels and season both sides generously with salt and black pepper.
In a large skillet, heat the olive oil over medium-high heat until shimmering.
Carefully place the steak in the skillet and sear for about 4-5 minutes without moving it, until a golden-brown crust forms.
Flip the steak and add the crushed garlic and butter to the skillet. Cook for another 4-5 minutes for medium-rare, basting the steak with the melted butter and garlic.
If using, add thyme or rosemary sprigs to the skillet during the last minute of cooking for added flavor.
Remove the steak from the skillet and let it rest on a cutting board for at least 5 minutes before slicing. This allows the juices to redistribute.
Slice against the grain and serve with the garlic butter drizzled over the top.