Remove the steak from the refrigerator and salt it generously on both sides. Leave it at room temperature for 30-45 minutes before you’re ready to cook.
Preheat a large skillet with oil over medium-high heat.
Sprinkle pepper on both sides of the steak. Transfer the steak to the pan and add the butter.
Sear for 3-5 minutes on each side until a golden-brown crust forms, spooning the melted butter over the steak several times during the searing process. Be mindful of your steak thickness. Steaks around 1-inch thick will need closer to 3 minutes per side for medium-rare, while thicker steaks of 1 ½-2+ inches may need closer to 5 minutes on each side.
Check the temperature with a probe thermometer. The internal temperature should reach 125 degrees for medium rare. If more time is needed or to cook to your preferred doneness level, reduce the heat to low and cook for another 3-5 minutes.
Remove the steak from the heat and rest at room temperature, loosely covered in foil, for 5-10 minutes.