Let your steak come to room temperature for 30-45 minutes.
Dry each side well with a paper towel. This ensures a good sear.
Evenly add seasonings to both sides of the steaks.
Heat a cast iron skillet over medium high heat for 5 minutes. When it's hot pour in the oil.
Sear the edges of the steak 30 seconds to 1 minute. Lay the steak in the pan and let sear 5-7 minutes each side without moving the steaks.
Add 2-4 tablespoons of butter to the pan along with garlic cloves and/or fresh rosemary or thyme. Spoon the melted butter over the steak. Continue cooking until desired doneness, a meat thermometer is most accurate. (see notes for internal temperature guide)
Remove the steaks to a plate or cutting board. Let rest for 5 minutes.
Slice the steaks against the grain and top with the remaining butter from the pan. Enjoy!