Smoked Beef Tenderloin Temp and Time: Pull, Rest, and Slice

Tenderloin is one of the leanest and priciest roasts at the holiday meat counter, and it cooks fast. With almost no collagen to break down, the smoker adds flavor and an even center, and the thermometer decides when the cook stops.

Where to pull it

A tenderloin has very little fat or connective tissue, so it never stalls and gains nothing from extra hours. ThermoWorks pulls a whole tenderloin at 125°F and lets about 5 degrees of carryover bring the center to 130 to 135°F during the rest. Probe the thickest part of the center, then check one or two more spots along the length before you call it.

Time on the pit: about 1.5 to 2.5 hours

At 225 to 250°F, a trimmed 4 to 5 pound tenderloin usually needs about 1.5 to 2.5 hours to reach a medium-rare pull. Smoking-Meat.com reports about 2 hours at 225°F for a 4 pound roast. A bigger roast adds less time than its weight suggests, because it grows longer more than thicker: the same source did not expect an 8 pound tenderloin to need more than about 3 to 3.5 hours.

Start probing well before the estimate. An early finish can rest a little longer. An overshoot of 15 degrees cannot be taken back, and on a cut this lean it shows. A hotter 300°F pit also works and finishes in about an hour, with less time for smoke flavor to build.

Trim and tie it first

A whole tenderloin tapers from a thick center to a thin tail, and the tail overcooks long before the center is ready. Fold the tail under and tie the roast with butcher's twine about every 2 inches so it becomes one even cylinder. Strip the silverskin, the tough silver membrane along the top, if the butcher left it on, since it tightens and curls on the pit. Season simply. Salt and coarse pepper is the standard, because a heavy rub buries the mild beef flavor.

How much to buy

Plan on about half a pound of trimmed tenderloin per person for a main course, the common guidance from Southern Living and butcher counters. A trimmed 4 to 5 pound roast serves about 8 to 10. An untrimmed tenderloin, sold with its fat and side muscle attached, loses a good share of its weight to the knife, so buy more if you will trim it yourself.

Rest, then slice

Rest the tenderloin 10 to 15 minutes, loosely tented with foil. It is a small roast and loses heat quickly, so a longer rest mostly serves it cooler. Cut and pull the twine, then slice across the grain into rounds about 3/4 inch thick for steak-style plates, or thinner for a buffet platter.

If you want a crust

Smoked tenderloin comes off the pit browned with a soft surface. For a seared crust, pull it 10 to 15 degrees early and sear it hot on a grill or heavy pan for a few minutes, turning it, with the probe still in. The center keeps climbing during the sear, so take the final reading there. The reverse-sear prime rib guide walks through the same handoff on a bigger roast.

If dinner slips

Tenderloin is a poor candidate for a long hold. Federal guidance limits cooked food between 40°F and 140°F to 2 hours total, or 1 hour above 90°F, and keeping it at 140°F or above for hours pushes a medium-rare center past medium. For a short delay, leave the roast whole and tented and slice at the table. For a longer one, move the start time so the roast comes off close to dinner. If you have seen 135°F quoted as a holding floor, that figure comes from the FDA Food Code for inspected commercial kitchens; the home floor stays 140°F.

Your next move

For a bone-in holiday roast with a longer clock and the same doneness choice, use the smoked prime rib guide. The smoked leg of lamb guide covers the other sliced holiday roast, and the tri-tip guide has a quicker beef cut with the same smoke-then-sear shape. Shopping for the much smaller pork cut instead? That is the pork tenderloin guide.