To grill a whole beef tenderloin, trim off the silverskin, fold the thin tail under and tie the roast into an even cylinder, then cook it over indirect heat on a two-zone grill and sear it over direct heat at the end. Pull it when a thermometer in the thickest part shows your target, and remember that USDA’s Food Safety and Inspection Service sets 145°F with a three-minute rest as the safe minimum for beef roasts. A whole tenderloin is lean, quick to cook and easy to overdo, so the grill set-up and the thermometer matter more than the seasoning.
Why Tenderloin Is Different From Other Roasts
The tenderloin is a long, tapering muscle that does very little work, which is why it is so soft. Our sister site’s explainer on where the tenderloin sits on the animal and why it is so soft goes into the anatomy. For the grill, three traits matter:
- Very little fat. There is no fat cap to baste it, so it dries quickly once it passes your target.
- Uneven shape. A thick “head” at one end tapers to a thin “tail” at the other. Untied, the tail overcooks long before the head is ready.
- Mild flavour. It needs good seasoning and a proper crust; heavy smoke can overpower it.
Trimming and Tying
Whole tenderloins are sold either “peeled” (trimmed) or “unpeeled” with fat and a side muscle called the chain still attached. If you buy it untrimmed:
- Pull away the loose fat with your fingers and a knife.
- Remove the chain, the long, narrow strip running along one side. It is edible; trim it and grill it separately as a cook’s snack, or use it for stir-fry.
- Remove the silverskin. Slide a thin, sharp knife under one end of the shiny membrane, angle the blade slightly upward, and pull the membrane taut while you cut along it. Silverskin does not soften on the grill and makes the meat curl.
- Fold the tail under so the roast is closer to the same thickness end to end.
- Tie it with butcher’s twine about every inch and a half to two inches.
For a mixed crowd, some cooks prefer to cut the tail off and cook it separately so that some pieces end up more done than the rest.
Seasoning
Salt the tenderloin generously, ideally several hours or a day ahead, and leave it uncovered on a rack in the refrigerator. The surface dries and the salt seasons the meat beneath it, which helps you get a better crust. Just before grilling, add coarse black pepper and, if you like, garlic powder or chopped fresh herbs. Brush a thin coat of oil on the meat, not the grate. Keep raw meat on its own board and tray, and use a clean platter for the cooked roast.
Keep the raw roast refrigerated until you are ready to cook. FSIS’s Basics for Safe Food Handling gives 3 to 5 days in the refrigerator for fresh beef roasts.
Setting Up a Two-Zone Grill
You need a cooler side for gentle cooking and a hot side for searing. Our guide to direct and indirect heat covers the set-up in detail. In short:
- Charcoal: pile lit coals on one side of the kettle and leave the other side empty. Put the lid vent over the empty side so heat draws across the meat.
- Gas: light one or two burners on high and leave the others off. Close the lid and let it preheat fully.
Place an oven or probe thermometer at grate level on the cool side to see what the meat is actually cooking at. The lid thermometer can mislead.
Two Ways to Cook It
Reverse sear (indirect first, sear last)
Cook the tenderloin on the cool side, lid closed, until it is some degrees below your target. Then move it over the hot side and sear on all sides for a minute or two each, turning with tongs, until crusted. This gives the most even colour from edge to center and makes timing easy, because you can hold the roast before the sear. Our article on the reverse sear method explains why.
Sear first, then indirect
Sear the roast over the hot side first, then move it to the cool side to finish. This is the traditional restaurant order and works fine, but it leaves a wider band of more-done meat under the crust and gives less control at the end. If your guests are arriving on a firm timetable, reverse sear is easier.
Doneness and Temperature
The USDA FSIS safe minimum internal temperature chart lists 145°F, with a rest of three minutes, for beef steaks, roasts and chops. That is the federal safety figure. Many tenderloin recipes aim lower for a rarer roast; that is a matter of preference and falls below the USDA minimum.
Whatever you aim for:
- Probe the thickest part of the head, not the folded tail.
- Check in more than one spot. A tied roast can still have a thick end and a thin end.
- Remember the temperature keeps rising for a few minutes after the meat comes off the heat. Pull a little early and let the rest take it the final degrees.
Our steak grilling guide covers carryover cooking and the rest in more depth; the same principles apply here at a larger scale.
Timing for a Holiday Meal
A whole tenderloin is relatively thin, so it cooks far faster than a rib roast. That makes it a good choice for a winter cookout, when you would rather not stand outside for hours. The actual time depends on the roast’s thickness, your grill and the weather, so use a leave-in probe and plan to be ready early. If it finishes before the guests are ready, rest it tented and hold the sear until the last minutes.
Resting, Slicing and Serving
Rest the tenderloin for a few minutes, then cut the strings and slice across the grain. Slices about half an inch to an inch thick show off the colour. Serve with a simple pan sauce, horseradish cream, chimichurri or compound butter; the meat itself is mild, so a sharp or herby sauce works well.
For leftovers, refrigerate within 2 hours in shallow containers, and use within 3 to 4 days, per FSIS’s food-handling basics. Cold leftover tenderloin sliced thin on bread is arguably better than the original meal.
Frequently Asked Questions
What is the safe internal temperature for beef tenderloin?
USDA FSIS lists 145°F, followed by a three-minute rest, for beef steaks, roasts and chops, which includes a tenderloin roast.
Should I tie a beef tenderloin before grilling?
Yes. Folding the thin tail under and tying the roast at regular intervals gives it an even thickness so it cooks at one rate from end to end.
Do I need to remove the silverskin?
Yes. Silverskin does not break down on the grill, makes the meat chewy and causes it to curl. Remove it with a thin, sharp knife before seasoning.
Is reverse searing better for tenderloin?
For most backyard cooks, yes. Cooking indirectly first and searing at the end gives more even doneness and lets you hold the roast before the final sear.
Can I smoke a beef tenderloin?
You can, but keep the smoke light and short. The meat is mild and lean, and the cook is not long, so a small amount of a wood such as oak is plenty.