A 3 lb (1.36 kg) pork tenderloin—usually two or three smaller tenderloins cooked together—takes about 18–25 minutes in a 400°F (200°C) oven after a quick sear. The thermometer, not the clock, determines when it is done: season the pork simply, roast it until the thickest part reaches the safe temperature, then rest before slicing.
Ingredients
- 3 lb (1.36 kg) pork tenderloin, usually 2–3 pieces; remove any silver skin
- 1 tbsp (15 ml) olive oil
- 1½ tsp (9 g) kosher salt
- ¾ tsp (2 g) freshly ground black pepper
- 1 tsp (2 g) smoked paprika
- 1 tsp (1 g) dried thyme, or 1 tbsp (3 g) fresh thyme leaves
- 1 tbsp (15 g) Dijon mustard
- 3 garlic cloves (about 9 g), finely grated or minced
- 1 tbsp (15 ml) chopped fresh rosemary, or 1 tsp (1 g) dried rosemary
- ½ cup (120 ml) low-sodium chicken broth
- 1 tbsp (15 ml) apple cider vinegar
- 1 tbsp (14 g) unsalted butter
Instructions
- Heat the oven and prepare the pork. Set a rack in the centre of the oven and preheat it to 400°F (200°C). Pat the tenderloins dry with paper towels. If there is a thin, shiny membrane called silver skin, slide a small sharp knife just beneath it and trim it away; it can tighten as it cooks. Tuck very thin tails underneath so the pieces cook more evenly. If your package contains several tenderloins, keep them as separate pieces rather than stacking or tying them together.
- Season. Stir together the salt, pepper, paprika, thyme, Dijon, garlic and rosemary in a small bowl. Rub the mixture over all sides of the pork. If the seasoning does not spread easily, add a teaspoon of the measured olive oil. A short time on the counter while the pan heats is fine, but there is no need to leave raw pork out to warm up; keep the total time at room temperature under two hours.
- Sear the tenderloins. Heat the remaining olive oil in a large oven-safe skillet over medium-high heat. When it shimmers, add the pork without crowding the pan. Sear for about 1–2 minutes per side, turning with tongs, until several sides are lightly browned; this usually takes about 5–6 minutes in total. If the pan is too small, sear in batches. Browning adds flavour, but it does not seal in juices or tell you whether the centre is cooked.
- Roast and check the temperature. Transfer the skillet to the oven, or move the pork to a shallow roasting pan. Roast for about 18–25 minutes, turning the pieces once if they are browning unevenly. Begin checking the thickest tenderloin at 18 minutes; thin pieces may finish first, so remove them separately if needed. Insert an instant-read food thermometer into the centre of the thickest part without touching the pan. The USDA FSIS safe minimum for whole cuts of pork is 145°F (63°C), followed by a rest of at least 3 minutes. Do not rely on colour or a fixed cooking time in place of the thermometer.
- Rest, then make the quick pan sauce. Move the pork to a clean cutting board, tent loosely with foil and rest for 10 minutes. This gives the juices time to settle and exceeds the required three-minute minimum rest. While it rests, carefully pour off excess fat from the skillet, leaving browned bits behind. Set the skillet over medium heat, add the broth and vinegar, and scrape up the browned bits. Simmer for 2–3 minutes, then remove the pan from the heat and swirl in the butter. Taste and adjust the sauce with a little salt or pepper if needed.
- Slice and serve. Cut the rested pork crosswise into slices about ½ inch (1.3 cm) thick. Arrange the slices on a warm platter and spoon over some sauce, serving the rest at the table. If one piece is noticeably thicker than the others, slice it a little thinner so portions are easy to serve.
Tips
- Use thickness as your timing guide. The 18–25-minute oven estimate assumes a 3 lb total made up of typical tenderloins around 1–1½ lb each. A single unusually thick piece, or pieces packed tightly together, can take longer. Start checking early and cook each piece to temperature rather than trying to force every tenderloin to finish at the same moment.
- Choose an instant-read thermometer. Insert it from the side into the centre of the thickest section for a reliable reading. Check more than one piece if their sizes differ. If the pork is below 145°F (63°C), return it to the oven and check again after a few minutes; avoid cutting into it repeatedly, which releases juices.
- Swap herbs or mustard to suit what you have. Use dried oregano in place of thyme, or use 1 tsp (1 g) dried rosemary instead of the fresh amount. Whole-grain mustard can replace Dijon; it leaves small mustard seeds and a slightly coarser texture. If you have no mustard, omit it and use the oil to help the garlic and herbs cling.
- Don’t mistake pork loin for tenderloin. Tenderloin is long, narrow and lean; pork loin is a wider, thicker roast and needs a different timing estimate. Check the package label and use the thermometer either way. For tender, neat slices, cut across the grain after resting rather than carving lengthwise.
Serving Suggestions
Serve the pork with mashed potatoes, roasted potatoes or buttered noodles to catch the mustard-herb pan sauce. Green vegetables such as green beans, broccoli or asparagus balance the rich browned flavours, while a crisp salad with apple or fennel brings a fresh contrast. For an easy dinner, add carrots or small potatoes to a separate roasting pan; do not crowd them around the tenderloins, since they need longer to become tender and can interfere with even browning.
The sauce is savoury, lightly tangy and intentionally simple. If you want more sauce for a larger table, double the broth and vinegar and simmer it a little longer to concentrate the flavour, then swirl in an extra tablespoon of butter. Keep the tenderloin itself whole until just before serving if dinner is delayed briefly; slice it at the last moment so the cut surfaces do not dry out.
Variations
Lemon and herb: Replace the paprika with finely grated zest from one lemon (about 1 tbsp / 6 g), and use parsley in place of rosemary. Add 1 tbsp (15 ml) lemon juice to the pan sauce after removing it from the heat for a brighter finish.
Maple-Dijon: Whisk 1 tbsp (15 ml) maple syrup into the mustard-and-garlic rub. The surface will brown more quickly because of the sugar, so check the pork early and lower the oven to 375°F (190°C) if the outside is getting too dark before the centre reaches temperature.
Spicy paprika: Add ¼ tsp (0.5 g) cayenne pepper to the seasoning and use sweet paprika instead of smoked paprika if you want heat without a smoky note. For a mild version, leave out the cayenne and keep the rest of the rub unchanged.
Grill instead: The same seasoning works on a grill, but grilling time depends on the heat and thickness of each piece, so the oven estimate does not apply. Brown the tenderloins over direct heat, then move them to a cooler part of the grill, cover and cook until the thickest part reaches 145°F (63°C), followed by at least a 3-minute rest.
Storage and Reheating
Refrigerate leftover pork within 2 hours of cooking, in a shallow airtight container. Keep the meat and sauce together or store them separately; both will keep in the refrigerator for 3–4 days. For freezing, wrap the cooled pork tightly or place it in a freezer-safe container and freeze for up to 2–3 months for best quality. Thaw it in the refrigerator, not on the counter.
To reheat without drying the lean meat, put slices in a covered oven-safe dish with a spoonful or two of broth or sauce and warm at 300°F (150°C). You can also heat them gently in a covered skillet over low heat. Reheat leftovers to 165°F (74°C), checking the centre with a food thermometer. If reheating a large piece, slice it first so it warms more evenly; avoid repeated heating and cooling.
Frequently Asked Questions
How long does a 3 lb pork tenderloin take at 400°F?
For 3 lb total divided among two or three typical tenderloins, allow about 18–25 minutes in the oven after searing, or roughly 25–30 minutes of cooking time including the sear. Rest it for 10 minutes before slicing. Because shape and thickness vary, use the time as an estimate and confirm 145°F (63°C) in the thickest part.
Is a 3 lb pork tenderloin one piece or several?
Most grocery-store pork tenderloins weigh around 1–1½ lb apiece, so a 3 lb amount is commonly two or three pieces. A single 3 lb cut is often pork loin, which is wider and cooks differently. Check the label and the shape; if it is one very thick tenderloin, it may need longer than the estimate in this recipe.
Can I cook it without searing first?
Yes. Put the seasoned tenderloins in a shallow roasting pan and roast at 400°F (200°C), checking the thickest part after about 20 minutes. Skipping the sear saves a pan step but gives you less browned flavour and no skillet fond for the quick sauce. Cook to the same thermometer reading rather than adding a fixed number of minutes.
Should pork tenderloin be pink in the middle?
It can be slightly pink when safely cooked. Whole cuts of pork are safe at 145°F (63°C) with a rest of at least 3 minutes, according to USDA FSIS guidance. Colour alone is not a dependable safety check: lighting, cut size and cooking method can all affect how the centre looks.
Why did my tenderloin turn out dry?
The most common cause is cooking it past the target temperature, especially because tenderloin is lean. Start checking early, measure the thickest part accurately and remove thinner pieces as they reach temperature. Resting before slicing also helps the juices stay in the meat instead of running onto the cutting board.
Can I season the pork ahead?
Yes. Apply the rub, cover the pork and refrigerate it for up to 24 hours before cooking. Keep raw pork refrigerated during that time, then sear and roast as directed; it does not need to sit out to warm up. If the surface looks wet after refrigeration, pat it gently dry before searing for better browning.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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