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Pork Loin Tenderloin

Loin vs tenderloin

They sound alike but differ. The pork loin is a wide, thick roast from along the back, often 2 to 5 lb as a boneless roast, with a fat cap on one side. The tenderloin is a narrow, tapered muscle under the backbone, usually around 1 lb, very lean and the most tender cut on the pig. Both are lean compared with shoulder, so they do not benefit from long cooks the way pork butt does.

Safety and doneness

USDA FSIS lists 145°F (62.8°C) with at least a 3-minute rest for pork chops, steaks and roasts on its safe minimum internal temperature chart. At 145°F a loin may still be slightly pink, which is normal for safely cooked pork. Going far beyond that tends to make lean pork dry. Insert the thermometer in the thickest part from the side, and pull as soon as it reads 145°F. Temperature may rise a few degrees as it rests.

Brining is worth it

Because loin is lean, a brine adds seasoning and helps hold moisture. A simple wet brine for a few hours (tenderloin) or overnight (loin) in the fridge is common. Calculate salt by weight with the brine calculator and follow a trusted recipe's strength and time. Rinse or pat dry afterward and season lightly because brined meat is already salty.

Preparing

Remove the silver skin from tenderloin by sliding a thin knife under it and angling up. Tie a loin roast with butcher's twine at intervals to keep it an even shape. Fold the thin tail of a tenderloin under and tie it so it does not overcook. Apply a rub; pork loves sweet-savoury blends. Scale with the rub calculator.

Pit temperature and timing

Lean cuts can be smoked at a moderate pit temperature, often 225 to 275°F, staying within USDA FSIS's 225 to 300°F smoking guidance. Some cooks use a reverse sear: smoke until a few degrees below target, then sear over high heat for crust, still pulling at or above 145°F. Time depends on thickness, not just weight. Put your own rate in the smoking time calculator, and start checking early.

Wood

Apple, cherry and maple are mild and suit lean pork. Hickory is classic but use it lightly. See the wood pairing chart.

Slicing and serving

Rest at least 3 minutes as USDA FSIS advises; many cooks rest 10 minutes for juicier slices. Slice across the grain into medallions. Serve with a glaze applied in the last 15 to 30 minutes of cooking or a sauce on the side.

Worked example

Figures below are illustrative examples (2026-10-29), not quotes or guarantees.

Assumptions: two 1.2 lb tenderloins, brined 3 hours, pit at 250°F, planning rate 75 min/lb per piece (pieces cook side by side). Each: about 90 min, range about 72 to 108 min. Start checking at 60 min; pull at 145°F, rest 10 min. Together they serve about 5 people at an illustrative 6 oz each after trimming.

Loin roast example

Figures below are illustrative examples (2026-10-29), not quotes or guarantees.

Assumptions: a 4 lb boneless loin roast, tied, pit at 250°F, planning rate 45 min/lb. Estimate 3 h, range about 2 h 24 min to 3 h 36 min. Probe from the side at the thickest point; pull at 145°F.

Common mistakes

• Treating loin like shoulder and cooking it for hours past 145°F.
• Skipping the thermometer because the cut is small.
• Leaving the tapered tail of a tenderloin untied.
• Over-salting a brined loin with a salty rub.

Leftovers

Chill within 2 hours, use within 4 days, and reheat gently to 165°F per USDA FSIS leftovers guidance; thin slices reheat best.

Stuffing and wrapping a loin

Some cooks butterfly a loin, fill it with herbs, fruit or vegetables, roll and tie it. A stuffed loin takes longer than a plain one, and the filling must also get hot; check the centre of the filling with a thermometer as well as the meat. A bacon wrap adds fat to a lean loin, but bacon may not crisp at low pit temperatures, so finish it hotter if you want it crisp.

Thick chops

Thick-cut pork chops can be smoked like a mini loin, then seared. Brine them, smoke at a moderate pit temperature until close to target, then sear quickly and confirm at least 145°F with a 3-minute rest, per USDA FSIS. Use the brine calculator for salt.

Slicing and serving

Slice loin into even rounds about half an inch thick; tenderloin into medallions. Serve on a warm platter with juices. Leftover loin is excellent cold in sandwiches; chill within 2 hours and use within 4 days, per USDA FSIS. Reheat gently to 165°F if serving hot.

Common mistakes

• Cooking a lean loin with a long brisket-style plan, which dries it out.
• Skipping the brine on a very lean roast.
• Trusting colour instead of a thermometer; a little pink can be safe at 145°F after a 3-minute rest.
• Slicing immediately without resting, so juices run onto the board.
• Leaving the silverskin on a tenderloin, which tightens and curls as it cooks.

Quick checklist

Trim silverskin, brine, smoke at a moderate pit temperature, pull at 145°F, rest 3 minutes or more, slice and serve warm.

FAQ

Is pink pork safe?

At or above 145°F plus a 3-minute rest, yes, per USDA FSIS.

Loin or tenderloin for a crowd?

A loin roast feeds more people for less effort.

Should I wrap it?

Usually no; the cook is short.

Can I smoke pork chops?

Yes; thick chops follow the same 145°F rule.

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