Stuffed pork tenderloin is a butterflied pork fillet rolled around a savory spinach, cheese, and breadcrumb filling, then browned and roasted until juicy. At 400°F (204°C), plan on about 25–30 minutes in the oven after a quick sear, but use a thermometer rather than the clock to judge doneness.
Ingredients
- 1 pork tenderloin, about 1¼ lb (570 g), silver skin removed
- 1 tablespoon (15 ml) olive oil, divided
- 2 cups (60 g) baby spinach, roughly chopped
- 1 teaspoon (5 ml) olive oil for the filling
- 1 small garlic clove, minced, about 1 teaspoon (5 g)
- ⅓ cup (40 g) finely chopped shallot, about 1 small shallot
- ⅓ cup (35 g) panko breadcrumbs
- ⅓ cup (35 g) finely grated Parmesan cheese
- 2 ounces (57 g) cream cheese, softened
- ¼ teaspoon (1 g) dried thyme
- ¾ teaspoon (4.5 g) kosher salt, divided
- ½ teaspoon (1 g) freshly ground black pepper, divided
- Kitchen twine, about 4 pieces each 12 inches (30 cm) long
Instructions
- Heat the oven and prepare the pan. Set a rack in the middle of the oven and heat it to 400°F (204°C). Use an oven-safe skillet large enough to hold the rolled tenderloin, or have a small roasting pan ready. Pat the pork dry with paper towels. Remove any silver skin, the shiny, tough membrane along the outside, by sliding a sharp knife just under it and trimming it away.
- Make the filling. Heat 1 teaspoon (5 ml) olive oil in a skillet over medium heat. Add the shallot and cook for 2 minutes, stirring, until softened. Stir in the garlic for about 30 seconds, then add the spinach. Cook for 1–2 minutes, stirring, just until wilted and most visible moisture has evaporated. Transfer to a bowl and stir in the panko, Parmesan, cream cheese, thyme, ¼ teaspoon (1.5 g) salt, and a pinch of pepper. Mix until evenly combined. Let the filling stand for about 5 minutes so it is easier to spread; it should remain warm, not be left sitting out for an extended time.
- Butterfly the tenderloin. Place it lengthwise on a cutting board. Hold a long, sharp knife parallel to the board and cut into the side of the tenderloin, stopping about ½ inch (1 cm) from the opposite edge. Open the meat like a book. If it is still thick in places, make shallow cuts and open those sections too. Cover with plastic wrap or parchment and gently pound to an even thickness of about ½ inch (1 cm), taking care not to tear through it.
- Fill and tie. Spread the filling over the opened pork in an even layer, leaving a ½-inch (1 cm) border on all sides so it is less likely to squeeze out. Starting with a long edge, roll the tenderloin snugly around the filling. Position it seam-side down and tie with kitchen twine at 1½- to 2-inch (4–5 cm) intervals. Season the outside with the remaining ½ teaspoon (3 g) salt and the remaining pepper. If a little filling escapes at the ends, tuck it back in or leave it; do not pack more filling into the roll.
- Sear the pork. Heat the remaining 1 tablespoon (15 ml) olive oil in the oven-safe skillet over medium-high heat. When the oil shimmers, add the tenderloin seam-side down. Brown it for about 1½ minutes on each side, turning carefully with tongs, for roughly 5–6 minutes total. Browning adds color and flavor; it does not cook the pork through. If your skillet is not oven-safe, transfer the browned tenderloin to a shallow roasting pan.
- Roast and check both temperatures. Put the skillet or roasting pan in the oven. Roast for about 25–30 minutes, beginning to check around 20 minutes because tenderloins vary in thickness. Insert an instant-read thermometer into the thickest part of the pork, entering from the side and avoiding the filling. USDA FSIS says whole cuts of pork are safe at 145°F (63°C) followed by a 3-minute rest. Also check the center of the stuffing: USDA guidance for stuffing cooked inside meat is 165°F (74°C). If the stuffing has not reached 165°F (74°C), continue roasting and check again, keeping the thermometer away from the pan. The exact cooking time depends on the roll’s thickness and your oven, so temperature—not a fixed minute count—is the reliable test.
- Rest, then slice. Transfer the tenderloin to a clean cutting board and rest it for 10 minutes. The pork needs at least the USDA-required 3-minute rest after reaching 145°F (63°C); the full 10 minutes also lets the juices settle and makes the roll easier to slice. Snip and remove the twine. Use a sharp knife to cut crosswise into slices about ¾ inch (2 cm) thick, wiping the blade between cuts if the filling sticks.
Tips
- Choose a tenderloin, not a loin roast. Pork tenderloin is long, narrow, and usually weighs around 1–1½ lb (450–680 g); a pork loin is much larger and needs a different cooking time. If your tenderloin is especially small or thin, start checking early. If it is large, the thermometer still decides when it is ready.
- Keep the filling modest and fairly dry. Too much filling makes the roll hard to tie and can leave the center cool while the outside overcooks. Cook off excess spinach moisture before mixing, and leave a border around the meat. Panko can be replaced with plain fine breadcrumbs in the same quantity; the filling will be a little denser.
- Use a thermometer in two places. Check the pork itself and the middle of the filling separately, without touching the pan or passing the probe through several layers of meat. If the tenderloin reaches 145°F (63°C) before the filling reaches 165°F (74°C), keep roasting and recheck both. Avoid cutting the roll open repeatedly, which releases juices and makes temperature readings harder to interpret.
- Make tying and turning easier. Set the twine pieces under the opened meat before adding filling if tying a rolled tenderloin feels awkward. Tuck in loose ends, then turn the roll with tongs rather than piercing it with a fork. Let the finished roast rest before slicing so the filling stays in place.
Serving Suggestions
Serve the slices warm, arranging them so the spiral of filling faces up. The tenderloin pairs well with roasted potatoes, mashed potatoes, rice, or buttered egg noodles, all of which catch the juices from the pan. Add a green vegetable such as roasted broccoli, green beans, or sautéed cabbage, plus a crisp salad if you want a lighter contrast. For a simple pan sauce, move the pork to its resting board, pour off excess fat, and deglaze the hot skillet with about ½ cup (120 ml) chicken broth. Scrape up browned bits, simmer briefly, and season to taste. Do not pour the sauce over the roast before slicing if you want the browned exterior to stay distinct.
Variations
For a different cheese-and-herb filling, replace the spinach with ½ cup (75 g) finely chopped sautéed mushrooms and use 2 ounces (57 g) goat cheese instead of cream cheese. Mushrooms release water, so cook them until their pan is nearly dry before mixing them with the other filling ingredients. For a sharper flavor, use chopped sun-dried tomatoes—about ¼ cup (35 g), drained if oil-packed—and swap the thyme for dried oregano. Reduce the salt slightly if the tomatoes or cheese are quite salty.
You can also use chopped kale in place of spinach, but remove tough stems and cook it until tender; it usually needs a few extra minutes in the skillet. For a nutty variation, replace the panko with ⅓ cup (35 g) finely chopped toasted walnuts, though the filling will be less absorbent and a little looser. If Parmesan is unavailable, use finely grated Pecorino Romano and reduce the added salt because it is typically saltier. These are flexible filling ideas rather than fixed regional versions; keep the layer thin enough to roll and always check the center temperature.
Storage and Reheating
Refrigerate cooked pork within 2 hours of cooking, storing it in a covered airtight container. For the neatest leftovers, remove the twine and slice the tenderloin before chilling; keep the slices with any pan juices so they are less likely to dry out. Refrigerated cooked pork keeps for 3–4 days. For longer storage, freeze it in a tightly sealed freezer-safe container for about 2–3 months for best quality, then thaw it in the refrigerator rather than on the counter.
Reheat only the amount you plan to eat. Place slices in a covered oven-safe dish with a spoonful of broth or pan juices and warm at 325°F (163°C) until the center reaches 165°F (74°C), checking with a food thermometer. A microwave also works: arrange slices in a single layer, cover loosely, heat in short intervals, and turn or rearrange them so they warm evenly to 165°F (74°C). Reheating the whole roll takes longer and may dry the outer meat before the center is hot, so slices are usually more convenient.
Frequently Asked Questions
How long does stuffed pork tenderloin take to cook at 400°F?
After searing, allow about 25–30 minutes in a 400°F (204°C) oven for a typical 1¼-pound (570 g) tenderloin, then rest it for 10 minutes. It may take longer if the roll is thick or tightly packed. The pork must reach 145°F (63°C) and rest for at least 3 minutes, while stuffing cooked inside meat should reach 165°F (74°C).
Should I cover the tenderloin while it roasts?
Usually, no. Leaving it uncovered helps preserve the browned surface from searing. If the exterior becomes very dark before the center temperatures are reached, loosely tent the pan with foil for the remaining roasting time. Avoid wrapping it tightly, which traps steam and softens the browned exterior.
Can I prepare stuffed pork tenderloin ahead?
You can make the filling and butterfly the pork earlier in the day, then keep them covered separately in the refrigerator. For best texture and food safety, assemble close to cooking time, or assemble and refrigerate promptly, covered, for no more than a day. Do not leave raw stuffed pork at room temperature. If chilled after assembly, it may need a few extra minutes in the oven, so check both the pork and filling temperatures.
Why is my stuffed tenderloin cooking unevenly?
An uneven cut, an overly thick filling layer, or a loose roll can make some sections cook faster than others. Butterfly and gently pound the pork to a fairly even thickness, distribute the filling evenly, and tie the roll at regular intervals. Check the thickest section rather than relying on its color or the earliest temperature reading near an end.
Can I cook it without searing first?
Yes. Searing is for a browned, savory exterior rather than food safety, so you can roast the tied tenderloin directly in the oven if you prefer fewer steps. Expect the surface to be paler and the cooking time to vary slightly. Start checking early and use the same thermometer targets: 145°F (63°C) for the whole cut of pork with a 3-minute rest, and 165°F (74°C) in the stuffing.
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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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