Mix butter, salt, pepper, garlic, parsley and rosemary in a bowl. Place mixture on a sheet of plastic wrap, roll into a log and twist-off ends. Refrigerate for 1 hour.
Grilled Ribeye with Garlic-Herb Compound Butter
While mixture refrigerates, remove ribeyes from refrigerator to bring to room temperature.
Pre-heat your grill to 450°F. Season ribeyes with salt and pepper and place on grates over direct heat. Close lid and sear each side for about 1 minute.
Move steaks to indirect heat, place 1 tablespoon compound butter on top and cook for 3 minutes. Flip steaks and cook until internal temperature reaches at least 125°F for medium-rare doneness.
Remove steaks from grill and let rest for 5 minutes