I used to run a cooking blog, so I’ve watched dozens of world renown chefs prepare steak, and I’ve tested many different methods myself. The most popular and tasty method by far is to brush the steak with olive oil and sear it over high heat, finish cooking at lower heat, and then baste it with butter when it is finished. You can either baste it with butter in the pan, adding aromatics as desired, or just brush it down with butter and let it rest. There’s an internet trendy reverse sear method where you bake it at low heat first, and then finish it over high heat to obtain the sear, but the butter would still be applied after all of that, as the last step before resting.