Cooking beef tenderloin to the right temperature is crucial for achieving perfect doneness. For a rare roast, aim for an internal temperature of 120 to 125 F; for medium-rare, 130 to 135 F is ideal.
Roast: Make sure you're checking the internal temperature with a meat thermometer, as beef tenderloin can overcook quickly. Ideally, you want a nice medium-rare (120°F to 125°F) or medium (130 ...