What temp and how long do you cook a 4 lb beef tenderloin?

To cook a 4 lb beef tenderloin, preheat your oven to 425°F (220°C). Season the meat as desired, then roast it in the oven for about 20-25 minutes per pound, until it reaches an internal temperature of 135°F (57°C) for medium-rare. Allow the tenderloin to rest for 10-15 minutes before slicing to ensure juices redistribute.