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This 9 pound pork loin recipe transforms a simple cut into a showstopping centerpiece for any gathering. I developed this method after years of perfecting whole-hog cooking at my restaurant.
The slow-roasting technique ensures tender, juicy meat throughout this large cut. A fragrant herb crust creates a flavorful bark that locks in moisture while adding complexity.
With precise temperature control and timing, you'll achieve consistent results every time. The meat emerges perfectly cooked from edge to center, ready to impress.
This recipe proves that great pork doesn't require complex techniques—just patience and respect for quality ingredients. The result is a dish worthy of any celebration.
Ingredients for 9 pound pork loin
Twelve ingredients transform this pork loin into a celebration-worthy centerpiece with herb complexity.
| Ingredient | Amount | Notes |
|---|---|---|
| Pork Loin 🐷 | 9 lb | Bone-in, skin-on preferred |
| Kosher Salt 🧂 | 2 tbsp | Diamond Crystal preferred |
| Black Pepper 🌶️ | 1 ½ tbsp | Freshly cracked for best flavor |
| Fresh Rosemary 🌿 | ¼ cup | Chopped, stems removed |
| Fresh Thyme 🍃 | ¼ cup | Chopped, stems removed |
| Fresh Sage 🍃 | ¼ cup | Chopped, stems removed |
| Garlic Cloves 🧄 | 8 cloves | Minced for herb crust |
| Dijon Mustard 🟡 | ½ cup | For herb crust binding |
| Olive Oil 🫒 | ½ cup | Extra-virgin for richness |
| Dry White Wine 🍷 | 1 cup | For deglazing and moisture |
| Chicken Stock 🥘 | 2 cups | Low-sodium preferred |
| Unsalted Butter 🧈 | 4 tbsp | For basting and finishing |
| Yellow Onion 🧅 | 2 whole | Roughly chopped for roasting |
| Carrots 🥕 | 4 whole | Peeled, cut into chunks |
| Celery Stalks 🌿 | 4 whole | Cut into large pieces |
The pork loin quality is paramount here. Source bone-in, skin-on cuts from a reputable butcher or Costco—their whole pork loins are consistently well-marbled. The herbs should be organic when possible; their essential oils create the crust's aromatic depth. For the Dijon, Maille or Grey Poupon deliver the sharpness needed to cut through the fat. Avoid pre-ground black pepper—freshly cracked makes a noticeable difference in the crust's texture.
No fresh herbs? Use dried at one-third the quantity, but rehydrate them in warm water first to restore some vibrancy. Apple cider vinegar can substitute for the white wine in a pinch, though it lacks depth. If avoiding alcohol entirely, additional chicken stock with a splash of lemon juice works. For the butter, ghee offers a higher smoke point if you're concerned about scorching during basting.
Store the pork loin uncovered in the fridge for 1-2 days before cooking to dry the surface for better crust formation. The herb mixture can be made 24 hours ahead and refrigerated. Leftovers keep beautifully for 5-7 days and make incredible sandwiches or tacos.
Why You'll Love This Recipe
- Set It and Forget: I rub the pork loin with salt, pepper, fresh rosemary and thyme, pop it in the oven, and walk away for hours—no babysitting required.
- Herb Crust Perfection: That crispy rosemary-thyme crust with the juicy meat inside? I’d eat it every Sunday just for that bite.
- Feeds the Whole Crew: A 9-pounder means I can host my in-laws, pack lunches for days, or freeze half for later without extra effort.
- Budget Roast: Honestly, it’s cheaper per pound than smaller cuts, and one roast gives me multiple meals.
Step-by-step instructions for slow-roasted herb-crusted pork loin
This method ensures a perfectly cooked centerpiece with a fragrant herb crust and tender meat.
Prepare the Herb Crust and Season the Pork Loin
In a small bowl, combine the 0.25 cup Fresh Rosemary, 0.25 cup Fresh Thyme, 0.25 cup Fresh Sage, 8 cloves Garlic Cloves, 2 tbsp Kosher Salt, and 1.5 tbsp Black Pepper. Stir in the 0.5 cup Dijon Mustard and 0.5 cup Olive Oil until a thick paste forms. This herb mixture will create a flavorful crust that locks in moisture.
Pat the 9 lb Pork Loin dry with paper towels to ensure the crust adheres properly. Rub the herb paste evenly over the entire surface, pressing firmly to coat. Let the pork loin sit at room temperature for 30 minutes to allow the flavors to penetrate the meat.
Sear the Pork Loin for a Golden Crust
Preheat your oven to 325°F. In a large Dutch oven or roasting pan, heat 2 tbsp of the 4 tbsp Unsalted Butter over medium-high heat until melted and foaming. Add the pork loin and sear on all sides for 3-4 minutes per side until deeply browned. This step develops a rich, flavorful crust and enhances the overall depth of the dish.
Remove the pork loin from the pan and set it aside. In the same pan, add the 2 whole Yellow Onion, 4 whole Carrots, and 4 whole Celery Stalks. Cook for 5 minutes, stirring occasionally, until the vegetables begin to soften and brown slightly.
Deglaze and Begin Slow-Roasting
Pour the 1 cup Dry White Wine into the pan with the vegetables, scraping up any browned bits from the bottom. These bits, known as fond, are packed with flavor and will enrich the roasting liquid. Let the wine simmer for 2-3 minutes until it reduces by half.
Return the pork loin to the pan, placing it on top of the vegetables. Pour the 2 cups Chicken Stock around the pork loin. Cover the pan with a tight-fitting lid and transfer it to the preheated oven.
Slow-Roast to Perfection
Roast the pork loin, covered, for 3 to 3.5 hours. Baste the pork loin with the pan juices every 45 minutes to keep it moist and enhance the flavor. You'll know it's nearing completion when the internal temperature reaches 145°F in the thickest part of the loin.
During the last 30 minutes of roasting, remove the lid to allow the crust to crisp and brown. The pork loin is done when it reaches an internal temperature of 145°F and the juices run clear when pierced with a knife.
Rest and Serve
Transfer the pork loin to a cutting board and tent it loosely with foil. Let it rest for 20-30 minutes before slicing. This resting period allows the juices to redistribute throughout the meat, ensuring each slice is moist and flavorful.
Strain the pan juices and skim off any excess fat. Slice the pork loin and arrange it on a platter, drizzling the strained juices over the top for added moisture and flavor. Serve with the roasted vegetables for a complete, impressive meal.
Pro Tips For Making 9 Pound Pork Loin
- Use a Meat Thermometer: A 9-pound pork loin needs precise doneness—pull it at 145°F internally, then tent with foil for 15 minutes. I learned this the hard way after serving dry, overcooked slices to disappointed guests.
- Score the Fat Cap: Cut 1/4-inch slits in the fat cap before seasoning so the kosher salt, rosemary, and thyme penetrate deeper. Sounds weird, but it works—flavor gets locked in instead of sitting on the surface.
- Skip the Cold Loin: Let the pork sit at room temperature for 45 minutes before roasting. After burning three batches, I finally figured out that cold meat cooks unevenly and dries out the edges.
- Herb Paste Upgrade: Crush the fresh rosemary and thyme with a little olive oil and salt to make a paste, then rub it all over the loin. This isn’t the prettiest method, but it’s the tastiest—herbs stick better and infuse every bite.
Best sauces and condiments for this 9 pound pork loin
Classic Apple Compote
I always serve my pork loin with a warm apple compote—it's a Georgia classic that complements the herbs beautifully. Simmer 4 peeled Granny Smith apples with ½ cup brown sugar, 1 tsp cinnamon, and ¼ cup apple cider until tender. 💛
Tangy Mustard Glaze
Whisk together ¼ cup Dijon mustard, 2 tbsp honey, and 1 tbsp apple cider vinegar for a quick glaze. Brush it on during the last 30 minutes of roasting for a sticky, tangy finish that pairs perfectly with the herb crust.
Creamy Horseradish Sauce
This is my restaurant's signature: 1 cup sour cream, 3 tbsp prepared horseradish, 1 tsp lemon zest, and 1 tbsp chopped chives. The sharpness cuts through the richness of the pork beautifully.
Savory Mushroom Gravy
Sauté 8 oz cremini mushrooms in the pan drippings, then whisk in 2 tbsp flour and 2 cups beef stock. Simmer until thickened for a luxurious gravy that soaks into every bite. 🍄
Bright Chimichurri
Blend 1 cup parsley, ¼ cup cilantro, 3 garlic cloves, ½ cup olive oil, and 2 tbsp red wine vinegar. This Argentine-inspired sauce adds a fresh, herbaceous contrast to the slow-roasted pork.
Spiced Peach Chutney
A Southern staple at my Atlanta spot: 3 cups diced peaches, ½ cup apple cider vinegar, ¼ cup brown sugar, and 1 tsp mustard seeds. Simmer until thick and serve at room temperature.
Nutrition facts
Frequently asked questions
How long does it take to cook a 9 pound pork loin?
Slow-roast at 325°F for 3 to 3.5 hours, covered. Uncover for the last 30 minutes to crisp the crust. Always verify doneness with an internal temperature of 145°F in the thickest part.
Should I sear the pork loin first?
Yes, searing on all sides for 3-4 minutes per side over medium-high heat creates a flavorful crust. This step enhances the depth of flavor and texture.
How can I tell when the pork loin is done?
Use a meat thermometer to check the thickest part. It's done at 145°F internal temperature. The juices should run clear when pierced. Let it rest for 20-30 minutes before slicing.
Can I cook this in a slow cooker instead?
Not recommended for this size. A 9 lb cut needs oven roasting for even cooking and proper crust development. Slow cookers work better for smaller, tougher cuts.