Preheat the oven to 415°F. Combine coffee rub ingredients in a small bowl. Mix until incorporated.
Pat steaks dry and season liberally with salt and pepper on all sides. Rub a light layer of coffee rub on all sides. A generous, yet thin and even coating all around is best. Let steaks rest for 30 minutes prior to cooking to come to room temp and soak up the seasoning.
Heat 2 tablespoons of oil in an oven-safe cast iron skillet on high heat, allowing the skillet to become very hot. Twirl the pan as the oil heats to distribute. When the oil starts to smoke, place the steaks face down and sear undisturbed for 2 minutes. Flip and sear for an additional 2 minutes. This will give your steak a beautiful brown crust.
Add the thyme, rosemary, garlic, and butter to the skillet and immediately transfer to the oven. [WARNING] skillet may be hot, handle it with oven mitts. For rare, bake for 4 minutes. Medium rare, 5-6 minutes. Medium, 6-7 minutes. Medium well, 8-9 minutes. Remember, depending on the size of the steak, the more or less time it will take. This recipe is ideal for steaks roughly 1.5-2 inches thick.
Remove steaks from the skillet and set them on a plate, lightly cover with foil, and let sit for 5-10 minutes before serving. This is important to bring your steak to its final serving temperature.
Spoon the herb-infused pan drippings all over the steaks and serve.