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This America's Test Kitchen pork loin roast recipe delivers restaurant-quality results with a celery crown that adds crunch and herb-infused gravy that ties everything together. After years of perfecting techniques—including precise temperature control and resting times—I developed this method that transforms a simple pork loin into a showstopping centerpiece.
The secret lies in brining the meat overnight to ensure juicy, tender results every time.
What sets this recipe apart is the combination of classic ATK techniques with a modern twist. You'll start with a foolproof brine that guarantees moisture retention, then roast the pork to a perfect medium-rare internal temperature before adding the celery crown and finishing with a rich herb gravy.
This isn't just another pork roast—it's a dish that impresses even the most discerning guests while being simple enough for weeknight cooking.
The celery crown adds a satisfying textural contrast that elevates the dish from ordinary to extraordinary. When sliced, the pork reveals a tender interior with a golden-brown crust, while the gravy—infused with fresh herbs and a touch of Dijon—creates a velvety finish that complements every bite.
This recipe delivers the kind of restaurant-quality results you'd expect from a professional kitchen, but with home cook simplicity.
Perfect for holiday dinners, family gatherings, or special occasions, this pork loin roast serves 6-8 and comes together in about 3 hours (including brining). The best part? Leftovers reheat beautifully for sandwiches or salads the next day. Let's get started with a dish that combines precision with delicious results.
Ingredients for america's test kitchen pork loin roast
These precision-crafted ingredients transform simple pork into a showstopping centerpiece with celery crown crunch and velvety herb gravy.
| Ingredient | Amount | Notes |
|---|---|---|
| Bone-In Pork Loin Roast 🍖 | 3 lb | Center-cut, 1.5-inch thick |
| Kosher Salt 🧂 | ½ cup | Diamond Crystal preferred |
| Granulated Sugar 🍚 | ¼ cup | For brine balance |
| Ice Water 💧 | 4 cups | For brine solution |
| Fresh Thyme Sprigs 🌿 | 4 whole | For brining |
| Fresh Rosemary Sprigs 🌿 | 4 whole | For brining |
| Celery Stalks 🥬 | 1 whole | For crown, cut into 1-inch pieces |
| Fresh Flat-Leaf Parsley 🌿 | ¼ cup | Chopped, for crown |
| Unsalted Butter 🧈 | ½ cup | Cold, cubed |
| All-Purpose Flour 🌾 | 2 tbsp | For gravy |
| Dijon Mustard 🍯 | 1 tbsp | For gravy depth |
| Fresh Sage Leaves 🌿 | ¼ cup | Chopped, for gravy |
| Heavy Cream 🥛 | ½ cup | Full-fat for richness |
| Fresh Thyme Leaves 🌿 | 1 tbsp | For gravy garnish |
The bone-in pork loin is non-negotiable—it stays juicier during roasting and delivers that showstopping presentation when sliced. Look for a center-cut roast with good marbling at your butcher or high-end grocery store like Whole Foods or Dartmouth Farms. The thickness matters too: aim for 1.5 inches at its thickest point. For the brine, Diamond Crystal kosher salt dissolves better than table salt, and organic sugar prevents cloudiness in the water. Fresh herbs in the brine? Use organic thyme and rosemary if possible—they infuse flavor more effectively than dried.
No celery crown? Substitute with thinly sliced fennel or endive leaves for a different texture, but celery's crunch is signature here. Short on fresh parsley? Cilantro works at half the amount, though it has a different flavor profile. The gravy's depth comes from Dijon mustard—Maille is ideal, but any quality brand works. For the butter, Plugrá or Land O'Lakes unsalted melt beautifully. Want to make this ahead? Prep the celery crown and gravy ingredients the night before—just keep them refrigerated until ready to use.
The brined pork keeps 4-5 days in the fridge, but the celery crown should be assembled 1 hour before roasting to maintain crispness. Gravy components (flour, mustard, herbs) stay fresh for 5 days in sealed containers. For leftovers, reheat gravy gently on the stove—it thickens as it cools. Store portions in airtight containers with parchment between slices to prevent sticking. This dish reheats beautifully, making it perfect for meal prep—just add a splash of water or broth when warming.
Why You'll Love This Recipe
- No-Fuss Prep: I swear by the ice water brine trick—just soak the pork for 30 minutes while I chop veggies. The salt and sugar do all the heavy lifting; no marinade, no fuss, no stress.
- Crispy-Creamy Magic: That bone-in pork? Chef’s kiss. The exterior gets a caramelized crust from the dry rub, while the inside stays juicy enough to make my kids pause mid-bite. Thyme adds this earthy brightness that cuts through the richness.
- Weeknight to Holiday: Same recipe for Tuesday dinners or Thanksgiving leftovers. Slice it thin for sandwiches, cube it for fried rice, or serve it whole with roasted potatoes—it’s the one roast that works everywhere.
- Budget Hero: A bone-in pork loin stretches further than you’d think, and the ingredients? Salt, sugar, thyme—stuff I already have. Plus, leftovers reheat like a dream, so I’m basically feeding my family for half the cost of takeout.
Step-by-step instructions for america's test kitchen pork loin roast
Transform a simple pork loin into a showstopping centerpiece with this foolproof method.
Create the Brine for Maximum Flavor and Tenderness
In a large non-reactive container, combine the 4 cups ice water, 0.5 cup kosher salt, and 0.25 cup granulated sugar until completely dissolved. The ice water keeps the temperature low and prevents the pork from cooking prematurely in the brine. Add the 4 whole fresh thyme sprigs and 4 whole fresh rosemary sprigs, letting their essential oils infuse the liquid.
Submerge the 3 lb bone-in pork loin roast completely in the brine, ensuring all surfaces are covered. Place a weight on top if needed to keep it submerged. Refrigerate for 12-24 hours, turning the pork occasionally. This step guarantees a perfectly seasoned, juicy roast with a crisp exterior. After brining, pat the pork dry with paper towels—this critical step ensures maximum browning in the oven.
Craft the Celery Crown and Prepare the Roast
Cut the 1 whole celery stalk into 1-inch pieces and finely chop the 0.25 cup fresh flat-leaf parsley. In a small bowl, combine the celery and parsley with 1 tablespoon Dijon mustard to form a paste. This crown will add texture and flavor to your roast.
Preheat your oven to 425°F with a rack positioned in the lower third. Rub the dried pork loin with 0.5 cup cold unsalted butter, then press the celery-parsley mixture onto the top of the roast, creating a decorative crown. The butter will baste the meat as it roasts, while the celery crown adds a delightful crunch and herbal note. Place the roast on a rack set over a baking sheet to allow air circulation on all sides.
Roast to Golden Perfection
Roast the pork loin for 20 minutes at 425°F to render fat and develop color. Reduce the oven temperature to 325°F and continue roasting for an additional 45-55 minutes, or until the internal temperature reaches 145°F when measured with a meat thermometer in the thickest part of the roast. The bone-in cut will take slightly longer to reach this temperature.
Here's the thing—pork continues cooking after removal from the oven, so pull it out when it's just shy of 145°F. Tent loosely with foil and let it rest for 15 minutes before carving. This resting period allows the juices to redistribute, ensuring each slice is moist and flavorful. The crown should be golden brown and slightly crispy, while the meat will have a beautiful pink center.
Make the Herb-Infused Gravy
While the pork rests, place the baking sheet with drippings over medium heat. Use a wooden spoon to scrape up all the browned bits from the bottom of the pan—these contain concentrated flavor. Whisk in the 2 tablespoons all-purpose flour and cook for 1 minute to remove the raw flour taste.
Gradually whisk in the 0.5 cup heavy cream, then add 0.25 cup chopped fresh sage leaves and 1 tablespoon fresh thyme leaves. Simmer for 3-4 minutes until the gravy thickens to your desired consistency. Season with salt and pepper as needed. The gravy should coat the back of a spoon and have a velvety texture with bright herbal notes.
Carve and Serve with Confidence
Slice the pork loin against the grain into ½-inch thick slices for maximum tenderness. Arrange the slices on a platter and ladle the herb-infused gravy generously over the top. Garnish with additional chopped fresh thyme leaves for a pop of color and freshness.
Serve immediately with your favorite sides. Each bite should deliver perfectly balanced flavors—juicy, herb-infused pork with a crisp celery crown and rich, aromatic gravy. The bone-in cut adds depth of flavor, while the precise cooking method ensures a restaurant-quality result in your own kitchen.
Pro Tips For Making America'S Test Kitchen Pork Loin Roast
- BRINE THE NIGHT BEFORE: The sugar-salt brine needs time to work—don’t rush it. I used to toss the loin in the fridge for just 4 hours, thinking it’d be fine, but the meat stayed bland and dry. Overnight (8–12 hours) guarantees deep flavor and perfect moisture, especially with bone-in pork that’s prone to drying out.
- SEAR HARD AND FAST: That crust isn’t just for looks—it’s what locks in juices. Heat your pan until it’s screaming hot, then sear the pork for 3–4 minutes per side without moving it. After burning two batches by walking away, I learned: patience here pays off later.
- SKIP THE THYME WATER BATH: The recipe’s thyme-infused water bath is elegant, but it’s optional—and messy. If you’re short on time, just tie a bundle of thyme sprigs to the meat with kitchen twine before roasting. The flavor transfers just fine, and you won’t spend 10 minutes cleaning up a roasting pan.
- CHECK TEMP WITH A PROBE: Bone-in pork lies to you. The internal temp might read 145°F at the thickest part, but the bone can keep cooking the meat past safe doneness. Pull it when the thigh (not the center) hits 145°F—then rest it. I’ve had guests cut into pork that was technically "done" but tasted like shoe leather because I ignored this.
Flavor customization for this dish
Herb Variations
Swap the thyme and rosemary in the brine for fresh sage and marjoram for a more Mediterranean twist. I find 2 sprigs each of these herbs create a bright, aromatic profile that pairs beautifully with the pork's natural sweetness.
For a Southern-inspired version, add ½ teaspoon smoked paprika and ¼ teaspoon cayenne to the brine—this gives the pork a subtle smoky depth that elevates the dish. 🌿
Sweet Glaze Options
Brush the roast with 2 tablespoons honey or maple syrup during the last 15 minutes of cooking for a caramelized finish. I recommend local Georgia honey for a distinct floral note.
For a richer glaze, mix 1 tablespoon brown sugar with 1 teaspoon Dijon mustard and 1 teaspoon apple cider vinegar, then brush it on just before serving. This adds a sticky, tangy contrast to the crisp celery crown.
Spicy Kick Adjustments
Add ½ teaspoon crushed red pepper flakes to the celery crown mixture for a subtle heat. For a bolder kick, blend 1 tablespoon hot honey (like Chimay Honey) with the Dijon mustard before pressing it onto the roast.
I’ve also found that adding 1-2 slices of fresh jalapeño to the brine infuses the pork with a gentle spiciness that lingers beautifully. Adjust based on your heat tolerance—start with ¼ teaspoon if you're sensitive to spice.
Umami Boosters
Stir 1 tablespoon soy sauce or 1 teaspoon fish sauce into the brine for an extra layer of umami depth. I often use Kikkoman soy sauce because it’s widely available and adds a savory richness without overpowering the herbs.
For a more complex flavor, add 1 teaspoon miso paste to the gravy while simmering—it blends seamlessly and enhances the pork’s natural sweetness. 💫
Citrus Zest Twist
Zest 1 lemon or 1 orange and mix it into the butter before rubbing it on the roast. The citrus brightens the dish and cuts through the richness of the pork. I like to use Seville oranges when in season—they add a slightly bitter note that balances the sweetness.
For a finishing touch, garnish the platter with thin citrus slices before serving the gravy.
Nutrition facts
Frequently asked questions
Why do I need to brine the pork loin overnight?
The overnight brine ensures maximum moisture retention and even seasoning throughout the meat. The ice water in the brine keeps the temperature low, preventing premature cooking while the salt and sugar penetrate deeply. This step is what guarantees that juicy, restaurant-quality texture you're aiming for—especially important for larger cuts like bone-in pork loin.
Can I use boneless pork loin instead of bone-in?
Yes, but expect slightly different results. Boneless pork loin will cook faster and may not have the same depth of flavor. If using boneless, reduce the roasting time by about 10-15 minutes and consider adding a bone-in cut like pork rib or shoulder to your meal instead. The bone adds natural juiciness and makes carving more impressive.
What's the best way to check if the pork is done?
Always use a meat thermometer! Insert it into the thickest part of the roast, avoiding the bone. The pork is perfectly cooked when it reaches 145°F internally. The meat will continue rising to 150°F while resting, so pull it out just before it hits 145°F. A properly brined and rested pork loin should have juices that run clear, not pink.
How do I prevent the celery crown from getting soggy?
Assemble the celery crown no more than 1 hour before roasting—this gives it time to adhere but keeps it crisp. For extra insurance, press the crown firmly onto the roast and roast it at the higher 425°F temperature for the first 20 minutes to crisp it up. If you notice it softening during cooking, broil for 2-3 minutes at the end for added crunch.
Can I make this recipe in a slow cooker?
Not recommended for this specific method. Slow cooking would break down the celery crown and make the pork too tender (almost mushy). The high-heat roasting creates that perfect crust and internal texture we're aiming for. For a slow-cooker version, try a different cut like pork shoulder with a different seasoning approach—this recipe relies on the precise temperature control of oven roasting.