How Long to Cook a 1.5-Pound Pork Tenderloin

A 1.5-pound pork tenderloin takes about 15 to 20 minutes in a 400°F (204°C) oven after a quick stovetop sear, plus a short rest. This simple garlic-and-herb roast is sliced across the grain for a tender main dish; use a thermometer rather than time alone because thickness and ovens vary.

Ingredients

1 pork tenderloin, about 1.5 lb (680 g), silver skin trimmed
1 tbsp olive oil (15 ml)
1 tsp kosher salt (5 g; use about ¾ tsp fine salt)
½ tsp freshly ground black pepper (about 1 g)
2 garlic cloves, finely grated or minced (about 6 g)
1 tbsp Dijon mustard (15 g)
1 tsp dried thyme (about 1 g), or 1 tbsp chopped fresh thyme (about 3 g)
½ tsp paprika (about 1 g)
1 tsp lemon juice (5 ml), optional, for serving

Instructions

Heat the oven and prepare the pork. Set a rack in the center of the oven and heat it to 400°F (204°C). Start the oven while you prepare the meat, so its preheating time overlaps with the 15 minutes of prep rather than adding a separate wait. Pat the tenderloin dry with paper towels. If a thin, shiny membrane remains along the meat, slide a small sharp knife just under it and trim it away without removing much meat. A little surface fat can stay.
Season the tenderloin. Stir together the olive oil, salt, pepper, garlic, Dijon, thyme, and paprika in a small bowl. Rub the mixture over the entire tenderloin, including its ends. If one end is notably thin, tuck it under itself and secure it with a toothpick or tie it with kitchen twine; this helps the narrow end cook at a pace closer to the thicker center. Remove any toothpick before serving.
Sear the meat. Heat an oven-safe skillet over medium-high heat. When hot, add the tenderloin and sear it for about 2 minutes per side, turning to brown the long sides and ends, for roughly 6 minutes total. The goal is a golden surface, not a fully cooked center. If the pan is not oven-safe, transfer the seared pork to a small roasting pan before the next step.
Roast until it reaches temperature. Put the skillet in the oven and roast for about 15 to 20 minutes, turning the tenderloin is not necessary. Begin checking at 15 minutes by inserting an instant-read thermometer into the thickest part, from the side if that makes it easier to position the tip in the center. Continue roasting in short increments if needed. USDA FSIS recommends a safe minimum internal temperature of 145°F (63°C) for whole cuts of pork, followed by a 3-minute rest; remove the meat when it reaches 145°F (63°C). Do not judge doneness by color alone.
Rest, then slice. Transfer the pork to a clean cutting board and leave it undisturbed for at least 3 minutes. This required rest is included in the cook time; resting longer, up to about 5 minutes, is fine if you need time to finish sides. Slice across the grain into medallions about ½ inch (1.3 cm) thick. Spoon any juices from the board or pan over the slices, and add the optional lemon juice if you like.

Tips

Check that it is tenderloin. Pork tenderloin is a long, narrow cut that commonly weighs about 1 to 1½ pounds. Pork loin is a wider, thicker roast and needs a different cooking time. If the package says loin, do not rely on this recipe’s timing.
Use a thermometer in the thickest spot. A few minutes can make a noticeable difference with a lean tenderloin. Insert the probe into the center of the meat, avoiding the skillet and any thin end. If you have more than one piece or an unusually uneven tenderloin, check each thick section separately.
Adapt the seasoning without changing the method. No Dijon? Use 1 tablespoon (15 g) yellow mustard; it will taste a little sharper and less wine-like. You can replace dried thyme with 1 tablespoon (about 3 g) fresh thyme, or use ½ teaspoon (about 1 g) dried rosemary for a stronger piney note. Keep the salt amount similar.
Prevent sticking and smoke. Drying the surface helps it brown. Use a pan that is hot before adding the pork, but lower the heat if the garlic starts to burn during searing. If your skillet is small, cut the tenderloin in half crosswise and sear the pieces with space between them; check both pieces with a thermometer because they may finish at different times.

Serving Suggestions

Serve the sliced tenderloin while warm, with the pan juices spooned over the top. Its mild, savory seasoning works with roasted potatoes, mashed potatoes, rice, or buttered noodles, all of which can catch the juices. For vegetables, pair it with green beans, roasted carrots, broccoli, or a crisp salad dressed with a tart vinaigrette. A spoonful of applesauce or a quick apple relish is another familiar match for pork; the fruit’s sweetness and acidity balance the browned, garlicky surface.

For a simple pan sauce, move the cooked pork to a board to rest and carefully pour off excess fat, leaving the browned bits in the skillet. Set the pan over medium heat, add ½ cup (120 ml) chicken stock or unsalted broth, and scrape the bottom with a wooden spoon. Simmer for 2 to 3 minutes, then stir in 1 teaspoon (5 g) butter if desired. Taste before adding salt because the pork seasoning and stock may already be salty. Serve the sauce separately or drizzle a little over the sliced meat.

Variations

Smoky spice rub: Replace the thyme with ½ teaspoon (about 1 g) ground cumin and raise the paprika to 1 teaspoon (about 2 g). Smoked paprika gives a more pronounced smoky flavor, while sweet paprika keeps the seasoning gentler. Keep the mustard and garlic for a savory base.

Maple-Dijon finish: Mix 1 tablespoon (15 ml) maple syrup with the listed Dijon and brush it over the pork during the last 5 minutes of roasting. Do not add it before searing because the sugar can scorch in a hot skillet. Check the center temperature as usual; a browned or sticky glaze does not indicate that the pork is done.

Fresh lemon and herbs: Omit the paprika and add 1 teaspoon (about 2 g) finely grated lemon zest to the seasoning. After slicing, finish with lemon juice and 1 tablespoon (about 3 g) chopped parsley. This variation tastes brighter and is especially good alongside potatoes or a green salad.

Make it dairy-free: The basic recipe contains no dairy. If preparing the optional pan sauce, simply leave out the butter or finish it with 1 teaspoon (5 ml) olive oil instead. The sauce will be a little less rich but still flavorful from the browned skillet bits.

Storage and Reheating

Refrigerate leftover pork within 2 hours of cooking, storing it in a shallow airtight container with any pan juices. It keeps for 3 to 4 days in the refrigerator. For the juiciest leftovers, refrigerate the tenderloin in larger pieces and slice only what you plan to serve; slices can dry out more quickly. Freeze tightly wrapped portions for about 2 to 3 months for best quality, then thaw them in the refrigerator rather than on the counter.

To reheat, place slices in a covered skillet with a spoonful or two of broth, water, or reserved pan juices. Warm gently over low heat, turning once, until the pork reaches 165°F (74°C), the USDA FSIS temperature for reheated leftovers. You can also microwave it in a covered dish in short bursts, stirring or turning the pieces between bursts and checking the temperature in more than one spot. Reheating the whole piece rather than thin slices can help retain moisture, but it may take longer.

Frequently Asked Questions

How long does a 1.5-pound pork tenderloin take at 400°F?
After searing for about 6 minutes, plan on roughly 15 to 20 minutes in a 400°F (204°C) oven, then rest it for at least 3 minutes. For this recipe, the listed 29-minute cook time uses the upper end of the roasting estimate: 6 minutes searing, 20 minutes roasting, and 3 minutes resting. The thermometer reading, not the clock, determines when it is ready.

Should I cover pork tenderloin while it roasts?
No. Roast it uncovered so the browned exterior stays exposed to the oven’s heat. Covering it can trap steam and soften the seared surface. If the outside is browning faster than you want, loosely tent the pan with foil near the end, but still check the thickest part with a thermometer.

Can pork tenderloin be a little pink inside?
Yes. A slight blush of pink can remain when a whole cut of pork has reached the USDA FSIS safe minimum of 145°F (63°C) and then rested for at least 3 minutes. Color varies with the meat and lighting, so it is not a reliable safety test. Use a food thermometer and place it in the thickest section.

Do I have to sear the tenderloin first?
No, but searing adds a browned, savory surface. If you skip it, roast the seasoned tenderloin at 400°F (204°C) and begin checking its temperature early; the timing will differ from the seared version and may be shorter. Do not assume it needs the full searing-plus-roasting time, and do not skip the thermometer or required rest.

What if my tenderloin weighs more or less than 1.5 pounds?
Weight is a rough guide, while thickness has a bigger effect on cooking time. A thinner tenderloin can finish sooner, and a thick one can take longer even if the package weight is similar. Follow the same method, begin checking early, and cook to 145°F (63°C) in the thickest part followed by a 3-minute rest.

Can I season the pork ahead of time?
Yes. Rub on the seasoning, cover the pork, and refrigerate it for up to 24 hours before cooking. For more even cooking, take it out only while you heat the oven and prepare the pan; there is no need to leave raw pork at room temperature for an extended period. If you prepare it ahead, the additional chilling time is not included in the recipe’s 44-minute total.

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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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