How to Cook Pork Tenderloin Juicy Every Time (2026)

Pork tenderloin dries out fast — it has almost no fat and cooks through in under 25 minutes. Get the temperature wrong by 10°F in either direction and you go from juicy to chalky. This guide covers exactly how to cook pork tenderloin so it stays tender, whether you're using a cast iron on the stovetop, the oven, or both.

TL;DR: Sear pork tenderloin at high heat for 2–3 minutes per side, then finish in a 400°F oven until the internal temperature hits 145°F. Rest for 5 minutes before slicing. That's the whole method. The mistakes that ruin it — skipping the sear, not using a thermometer, slicing immediately — are easy to avoid once you know what they are.

Why this matters

Pork tenderloin is one of the leanest cuts on the animal. A 2026 Canadian nutrition panel puts it at roughly 3g of fat per 100g serving. That leanness is what makes it so easy to overcook. Supermarket pork often gets overcooked by 15–20°F because people are still cooking to the old 160°F standard. Health Canada updated its safe internal temperature guidance to 145°F with a 3-minute rest — the same standard used in the United States — and that change alone is the difference between juicy and dry.

If you're starting with pasture-raised pork from Northern Raised, the flavour is already better than most supermarket options, but the cooking rules are the same. Lean, fast-cooking, temperature-sensitive.

What you'll need

1 pork tenderloin (typically 400–500g / about 1 lb)
Cast iron skillet or heavy oven-safe pan
Instant-read meat thermometer (non-negotiable)
Neutral high-smoke-point oil (avocado or grapeseed)
Salt and pepper, or your preferred dry rub
Oven preheated to 400°F
About 25 minutes total, plus 5 minutes rest

The steps

Step 1: Thaw and dry the meat

If your tenderloin is frozen, thaw it in the fridge overnight — not on the counter. A full thaw takes 12–18 hours in the refrigerator for a 400–500g piece. Once thawed, pull it out 20–30 minutes before cooking and pat it completely dry with paper towels.

Why it matters: moisture on the surface creates steam in the pan, which prevents browning. A dry surface means you get a proper sear with actual colour and crust, which drives flavour. Skipping this step is the single most common reason home cooks get pale, bland tenderloin.

Common mistake: Cooking straight from the fridge. A cold centre means the outside overcooks before the middle reaches 145°F.

Step 2: Season aggressively

Season the entire surface — not just the top — with salt and pepper or a dry rub at least 15 minutes before cooking. For a basic rub that works well on pasture-raised pork: 1 tsp salt, ½ tsp black pepper, ½ tsp smoked paprika, ¼ tsp garlic powder per 500g of meat.

Why it matters: salt draws out a small amount of moisture, then gets reabsorbed over 15–20 minutes, seasoning the meat from the surface inward. Seasoning right before cooking just pulls moisture to the surface without time for reabsorption.

Common mistake: Under-seasoning because tenderloin looks small. It needs the same attention per surface area as any other cut.

Step 3: Sear in a hot pan

Heat your cast iron over high heat for 2 minutes until it's genuinely hot — a drop of water should evaporate instantly. Add 1–2 tsp of oil, then lay the tenderloin in the pan. Sear 2–3 minutes per side, turning to get colour on at least 3 sides. Total sear time: 8–10 minutes.

Why it matters: the Maillard reaction happens above 280°F on the meat surface. The sear creates flavour compounds that don't form in the oven. It also starts rendering any thin connective tissue and creates a surface that holds juices better during the oven finish.

Common mistake: Moving the meat constantly. Let it sit undisturbed so a crust forms. If it sticks when you try to turn it, it's not ready to flip.

Step 4: Finish in the oven at 400°F

Transfer the pan directly to a preheated 400°F oven (or move the tenderloin to a baking tray). Roast for 8–12 minutes depending on thickness. A 400g tenderloin typically needs 8–9 minutes; a 500g piece needs 10–12 minutes.

Why it matters: the oven provides even, ambient heat that brings the centre to temperature without burning the outside. High heat (400°F) keeps the cooking time short enough that the exterior doesn't dry out while waiting for the centre to catch up.

Common mistake: Using a lower oven temperature to be "safe." Anything below 375°F extends cooking time and increases moisture loss.

Step 5: Pull at 145°F — not 160°F

Insert your thermometer into the thickest part of the centre. Pull the tenderloin out of the oven at exactly 145°F. The temperature will carry over to approximately 148–150°F during resting. This is safe and this is juicy. 160°F is overcooked for tenderloin in 2026.

Why it matters: each 5°F above 145°F squeezes more moisture out of the muscle fibres. At 160°F you've lost 10–15% more moisture than at 145°F, which is the difference between pork that slices cleanly and pork that crumbles.

Common mistake: Trusting time alone without a thermometer. Every oven and every tenderloin is different by thickness and starting temperature.

Step 6: Rest for 5 minutes before slicing

Move the tenderloin to a cutting board and let it sit, uncovered, for 5 full minutes. Then slice crosswise into 1.5–2 cm medallions.

Why it matters: resting lets muscle fibres relax and reabsorb juices that migrated to the surface during cooking. Slice immediately and those juices run onto the board instead of staying in the meat. Five minutes is enough — unlike a roast, tenderloin doesn't need 15–20 minutes.

Common mistake: Tenting with foil during rest. Foil traps steam and softens the crust you worked to build. Rest uncovered.

Step 7: Slice and serve

Cut against the grain — the muscle fibres run lengthwise, so crosswise slices shorten them and make each bite more tender. Serve immediately. Tenderloin is at its best in the first 5–10 minutes after slicing.

Troubleshooting

The outside is done but the centre is still raw after 12 minutes in the oven. The tenderloin was too cold going in. Next time, let it rest at room temperature for 30 minutes before cooking. For now, return it to a 375°F oven in 3-minute increments, checking temperature each time.

The meat is dry and chalky even though I pulled it at 145°F. Check your thermometer calibration — cheap dial thermometers can read 10–15°F low. Also confirm you rested the meat before slicing. If neither was the issue, the problem is likely that the tenderloin was very thin (under 350g) and the sear alone was enough to overshoot.

No crust formed during the sear. The pan wasn't hot enough, or the surface was wet. Cast iron needs at least 2 minutes of preheating on high. Pat the meat dry again before your next attempt.

The meat shrank and curled in the pan. There is a thin white membrane (silverskin) running along one side of the tenderloin. Remove it before cooking by sliding a sharp knife under it and pulling it off in strips. It doesn't break down with heat and causes the meat to curl and tighten.

The medallions are falling apart when I slice. You either sliced with the grain instead of against it, or the meat was slightly overcooked past 155°F. Slice perpendicular to the length of the muscle.

The rub burned during the sear. High-sugar rubs (anything with brown sugar or honey) burn at cast iron temperatures. Use a sugar-free rub for the sear and add any glazes in the last 3–4 minutes of oven time only.

Tools and resources

Instant-read thermometer — the only tool that removes guesswork. The Thermapen is the standard; any instant-read accurate to ±1°F works.
Cast iron skillet, 10–12 inch — holds and distributes heat evenly for a consistent sear. Oven-safe to 500°F.
Heavy-duty baking tray or roasting pan — if you don't have an oven-safe skillet.
Sharp slicing knife — a dull knife tears the fibres and squeezes out moisture as you cut.
Pork tenderloin from Northern Raised — pasture-raised, no hormones, no antibiotics, vacuum-sealed and delivered across Ontario. The pork loin chops use the same sourcing if you want a slightly fattier cut that's more forgiving at the stove.
For a similar method applied to another lean cut, the guide on how to cook beef tenderloin steaks at home covers the sear-and-oven approach in detail.

What to do next

Once you're comfortable with the basic sear-and-finish method, try a quick pan sauce. After the tenderloin comes out of the oven, deglaze the hot skillet with 125ml of chicken stock, scrape up the brown bits, and reduce for 2 minutes. Add a tablespoon of Dijon and a knob of butter, and you have a sauce that takes 3 minutes and tastes like a restaurant.

For sourcing quality pasture-raised pork in Ontario, the best pasture-raised pork to buy online in Canada guide covers what the labels mean and what to look for in 2026.

FAQ

What temperature should pork tenderloin be cooked to? Pull it at 145°F internal temperature, then rest for 5 minutes. Health Canada's current guidance aligns with this; 160°F is the old standard and it overcooks the meat.

How long does it take to cook pork tenderloin in the oven? At 400°F after searing, a 400–500g tenderloin takes 8–12 minutes in the oven. Total cook time including the sear is 18–22 minutes. Always confirm with a thermometer.

Can you cook pork tenderloin from frozen? No. Cooking from frozen results in an overcooked exterior and undercooked centre. Thaw overnight in the fridge and bring to room temperature 20–30 minutes before cooking.

Is it okay if pork tenderloin is slightly pink in the middle? Yes, in 2026. At 145°F with a 3-minute rest, a slight pink tinge is safe and expected. The grey, fully-cooked-through look means the meat hit 160°F or higher and is overcooked.

Do I need to marinate pork tenderloin before cooking? No, but it helps if you have time. Even 2 hours in a simple brine (1 tbsp salt per 500ml water) improves moisture retention noticeably. Dry rubs applied 15–30 minutes before cooking work well without any marinade.

Why does my pork tenderloin always come out dry? The three most common causes: cooking past 145°F, slicing before resting, or starting with a cold piece of meat from the fridge. Fix those three things and the result changes immediately.

What's the difference between pork tenderloin and pork loin? They're different muscles. Tenderloin is the long, narrow muscle running along the backbone — roughly 400–500g, very lean, cooks in under 25 minutes. Pork loin is wider, heavier (1.5–2kg), and has more fat. The cooking times and temperatures differ significantly; this guide covers tenderloin only.

Can I cook pork tenderloin entirely on the stovetop? Yes, but it's harder to manage. Reduce heat to medium after the sear and turn the tenderloin every 2–3 minutes for 10–14 minutes total. A thermometer is essential here because uneven pan heat makes it easier to overcook one end. The oven method is more reliable.

One last thing

Pork tenderloin is the second-leanest cut from the pig — only pork sirloin is leaner. At roughly 3g of fat per 100g, it has less fat than a skinless chicken breast. That's why every degree of internal temperature matters more than it does with fattier cuts. Fat insulates and forgives; tenderloin doesn't have that buffer. The thermometer isn't optional — it's the whole strategy.