Oven-roasted pork tenderloin is a lean, boneless cut seasoned with garlic, mustard, herbs, and a little oil, then cooked until tender and easy to slice. At 400°F (204°C), a typical 1- to 1¼-pound tenderloin takes about 20–25 minutes, but a thermometer—not the clock—is the reliable way to know when it is done.
Ingredients
- 1 pork tenderloin, 1 to 1¼ lb (450–570 g), silver skin trimmed
- 1 tbsp olive oil (15 ml)
- 1 tbsp Dijon mustard (15 g)
- 3 garlic cloves, finely grated or minced (about 9 g)
- 1 tsp kosher salt (about 5 g; use less if using fine table salt)
- ½ tsp freshly ground black pepper (about 1 g)
- 1 tsp smoked or sweet paprika (about 2 g)
- 1 tsp chopped fresh rosemary (about 1 g), or ½ tsp dried rosemary (about 0.5 g)
- 1 tsp chopped fresh thyme leaves (about 1 g), or ½ tsp dried thyme (about 0.5 g)
- 1 tsp packed brown sugar or honey (4 g), optional, for a lightly sweet, browned crust
- 1 tsp lemon juice (5 ml), optional, to brighten the seasoning before serving
Instructions
- Heat the oven and prepare the pan. Set a rack in the center of the oven and preheat to 400°F (204°C). Line a rimmed baking sheet with foil or parchment for easier cleanup, or use an oven-safe skillet. The 15-minute prep estimate includes preheating while you trim and season the pork; ovens take different amounts of time to heat, so wait until yours is fully hot before roasting.
- Trim and dry the tenderloin. Remove the pork from its packaging and pat it dry all over with paper towels. If a thin, shiny membrane remains along the side, slide a small sharp knife under it and trim it away, keeping the blade angled slightly upward so you do not remove much meat. This membrane can turn chewy as it cooks. Leave any small patches of fat in place; they help protect the surface.
- Mix the seasoning. In a small bowl, stir together the olive oil, Dijon mustard, garlic, salt, pepper, paprika, rosemary, thyme, and optional brown sugar or honey. Spread the mixture over every side of the tenderloin. If one end is noticeably thin, tuck it under itself and secure it with a short piece of kitchen twine or a toothpick so the meat cooks more evenly. Do not rinse raw pork; washing can spread raw-meat juices around the sink.
- Roast the pork. Place the tenderloin on the prepared pan, with space around it for hot air to circulate. Roast for about 20–25 minutes. Begin checking at 18 minutes because tenderloins vary in thickness and ovens vary in temperature. If using a skillet, make sure its handle is oven-safe; otherwise transfer the meat to a baking sheet before it goes into the oven.
- Check the temperature in the thickest part. Insert an instant-read food thermometer from the side into the center of the thickest section, avoiding 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. If the reading is below 145°F (63°C), return the tenderloin to the oven and check again after 2–3 minutes. Do not judge doneness by color alone; cooked pork can remain slightly pink.
- Rest before slicing. Transfer the tenderloin to a clean cutting board and let it rest for 5 minutes. This gives the required three-minute safety rest and allows the juices to settle while you finish a side dish or set the table. If the outside looks pale, avoid extending the roast just to brown it; the seasoning already provides flavor, and extra time can dry out this lean cut.
- Slice and serve. Remove any twine or toothpicks and cut crosswise into slices about ½ inch (1.3 cm) thick. Spoon any juices from the board over the slices, and add the optional lemon juice if you want a fresher finish. Serve while warm.
Tips
- Check that you have tenderloin, not pork loin. Tenderloin is a narrow, usually 1- to 1¼-pound cut that cooks quickly. Pork loin is much larger and thicker, so its oven time is different; do not use the 20–25-minute estimate for a whole loin roast. If the package contains two tenderloins, they may cook at different rates, so check each one separately.
- Use the temperature as your guide. A few minutes can make a meaningful difference with a lean tenderloin. Start checking early, place the thermometer in the thickest part, and return the meat to the oven if needed. An oven-safe leave-in thermometer is useful too, but confirm its probe is positioned in the center of the meat rather than touching the pan.
- Adjust the seasoning to what you have. If fresh rosemary or thyme is unavailable, use the dried amounts listed above. Whole-grain mustard can replace Dijon, though it gives the coating a more textured, tangy finish. You can omit the brown sugar or honey for a savory crust; it is optional and not needed for the pork to cook properly.
- Do not skip the rest or slice too soon. Cutting immediately can send more juice onto the board instead of keeping it in the slices. A five-minute rest is short enough to keep dinner warm but still gives the meat time to settle. If the tenderloin has cooled more than you like, serve it with warm pan juices or sauce rather than putting it back in the oven for a long time.
Serving Suggestions
Pair the tenderloin with sides that can be prepared while it roasts. Roasted potatoes, carrots, green beans, or Brussels sprouts suit the savory mustard-and-herb coating; if you want the vegetables cooked in the same oven, give them a head start if they need longer than the pork. Mashed potatoes, rice, or buttered noodles are good choices for catching the juices from the board. A crisp green salad, steamed broccoli, or sautéed apples adds a lighter or sweeter contrast without complicating the meal.
For a simple sauce, stir a spoonful of Dijon into the warm pan juices, or serve the slices with applesauce, a quick gravy, or a mustard sauce. If you make gravy, use a separate saucepan and add broth gradually so it does not become too thick. Slice only what you expect to serve right away; a remaining piece can be stored whole and cut later, which helps it stay moist.
Variations
Lemon-herb: Leave out the paprika and brown sugar, add 1 teaspoon (5 ml) lemon zest to the seasoning, and finish with a little lemon juice. The result tastes brighter and less smoky. Smoky-spiced: Use smoked paprika and add ½ teaspoon (about 1 g) ground cumin or chili powder. This gives the crust a warm, earthy flavor without changing the cooking method.
Maple-mustard: Replace the brown sugar with 1 teaspoon (5 ml) maple syrup and add another teaspoon of Dijon if you like a sharper coating. The syrup can darken more quickly, so keep an eye on the surface near the end of roasting; do not raise the oven temperature to speed things up. Garlic-free: Omit the garlic and add a little extra thyme, rosemary, or black pepper. For a milder flavor, use plain oil and herbs without mustard. These are seasoning variations only: use the same thermometer temperature and resting time for every version.
Storage and Reheating
Refrigerate cooked pork within 2 hours of cooking, placing it in a shallow airtight container once it is no longer steaming heavily. It keeps for 3–4 days in the refrigerator. For the best texture, store the tenderloin whole or in thick slices with any collected juices, rather than cutting it into very thin slices before storage. If you will not use it within that time, freeze it in a tightly sealed freezer-safe container for up to 2–3 months for best quality; thaw it in the refrigerator.
To reheat, warm slices gently in a covered skillet over low heat with a tablespoon or two of broth, water, or reserved juices. You can also use a covered oven-safe dish at 300°F (149°C), adding a splash of liquid to limit drying. Heat leftovers to 165°F (74°C), as recommended for reheated leftovers, and check with a food thermometer. Microwave portions in short intervals with a cover, turning or rearranging them between intervals. Reheat only the amount you plan to eat, since repeated heating can make the meat dry.
Frequently Asked Questions
How long does a 1-pound pork tenderloin take at 400°F?
Plan on roughly 20–25 minutes, then check the thickest part with a thermometer. A particularly thin tenderloin may finish sooner, while a thicker one may need a few extra minutes. Pan material, starting temperature, and oven accuracy all affect the timing, so use 145°F (63°C) followed by a 3-minute rest as the doneness standard rather than relying on a set number of minutes.
Should I cover pork tenderloin while it roasts?
No cover is needed for this recipe. Roasting it uncovered lets the seasoned surface brown and keeps the method simple. If the coating begins to look too dark before the center reaches 145°F (63°C), loosely tent the pork with foil for the remaining cooking time. Avoid wrapping it tightly from the start, which traps steam and prevents the surface from browning.
Is pork tenderloin safe to eat if it is pink?
It can be. Color alone does not reliably show whether pork is safely cooked, and pork cooked to the USDA FSIS minimum of 145°F (63°C) can have a faint pink center. Check the temperature in the thickest part and allow at least a 3-minute rest. If the thermometer has not reached 145°F (63°C), return the meat to the oven regardless of how the outside looks.
Do I need to sear pork tenderloin before baking it?
No. Searing is optional, and this recipe goes straight into the oven after seasoning. If you prefer a deeper browned crust, sear the pork in a hot, oven-safe skillet with a little oil for about 1–2 minutes per side, then transfer the skillet to the oven. That extra step adds active time and may shorten the roasting time, so check the internal temperature early.
Can I prepare the tenderloin ahead?
You can trim and season it up to a day ahead, cover it, and keep it refrigerated until ready to cook. Because the meat is lean and the seasoning contains salt, there is no need to leave it marinating for several days. Take it out while the oven heats, but do not leave raw pork at room temperature for an extended period. Roast it using the same temperature target and timing checks.
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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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