Preheat your oven to 375°F.
Get a heavy, oven-safe skillet ready on high heat.
Pat the steak dry with paper towels.
Brush it with olive oil to form a thin layer.
Season both sides with salt, pepper, and garlic powder.
Ensure the seasoning is evenly distributed for maximum flavor.
Sear the steak in the hot skillet for about 3 minutes on each side.
Look for a nice, brown crust to develop.
Add butter and rosemary to the skillet.
Transfer the skillet to the preheated oven.
Cook in the oven until the steak reaches your desired internal temperature.
It usually takes about 20-25 minutes for medium-rare.
Rest the steak for 10 minutes before slicing.