Pat the strip steak dry
Season both sides with salt and black pepper
Let it sit at room temperature for 20 to 30 minutes
Heat a cast-iron skillet or heavy pan over high heat
Add a small amount of oil with a high smoke point
Place the steak in the hot pan
Sear for 2 to 4 minutes without moving it
Flip the steak
Sear the other side for 2 to 4 minutes
Add butter, garlic, and herbs if desired
Baste the steak with the melted butter
Check the internal temperature
Cook to 125°F for rare
Cook to 135°F for medium-rare
Cook to 145°F for medium
Remove the steak from the pan
Rest the steak for 5 to 10 minutes
Slice against the grain
Serve immediately