How long would you cook two 8 lbs beef tenderloins?

You're going to need to provide more information! Here's why:

* Cooking Method: How are you cooking the tenderloins? Oven roasting, grilling, pan-searing, etc., will all affect the cook time.

* Desired Doneness: Do you want your tenderloins rare, medium-rare, medium, or well-done?

* Thickness: 8 lbs is the total weight of the tenderloins, but how thick are they individually?

Here's a general guideline, assuming you're roasting in the oven:

* Medium-rare: About 15-20 minutes per pound at 375°F. So, for two 8 lb tenderloins, that's about 2.5-3.5 hours.

* Medium: About 20-25 minutes per pound at 375°F. So, for two 8 lb tenderloins, that's about 3.5-4 hours.

Important Tips:

* Use a meat thermometer: The best way to ensure your tenderloins are cooked to your liking is to use a meat thermometer. The internal temperature for medium-rare is 130°F, and for medium, it's 140°F.

* Rest the meat: After cooking, let the tenderloins rest for at least 15 minutes before carving. This allows the juices to redistribute throughout the meat, resulting in a more tender and flavorful steak.

Let me know more about your cooking method and desired doneness, and I can give you a more precise estimate!