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A 9 lb pork loin recipe transforms Sunday dinner into a centerpiece worthy of a Southern feast. Slow-roasting at 325°F coaxes out maximum tenderness while building deep, herb-infused flavor layers.
This method works because low heat prevents drying out a cut this large. I rub the loin with garlic, rosemary, and thyme, then let it rest before slicing—this ensures juices redistribute for perfectly moist results every time.
The finished roast delivers golden, herb-crusted exterior with meat so tender it nearly falls apart. Carve into thick slices to showcase the even cooking and serve with pan juices for extra richness.
Ideal for feeding a crowd or meal prepping for the week. This technique never fails, even at this impressive scale.
Ingredients for 9 lb pork loin
A 9 lb pork loin and bold herbs create this impressive Southern-style centerpiece.
| Ingredient | Amount | Notes |
|---|---|---|
| Pork Loin 🥩 | 9 lb | Bone-in or boneless, trimmed of excess fat |
| Kosher Salt 🧂 | 2 tbsp | Diamond Crystal preferred for even distribution |
| Black Pepper 🌶️ | 1 tbsp | Freshly cracked for maximum aroma |
| Garlic Cloves 🧄 | 8 cloves | Peeled and minced finely |
| Fresh Rosemary 🌿 | ¼ cup | Chopped, stems discarded |
| Fresh Thyme 🍃 | ¼ cup | Leaves stripped from stems |
| Olive Oil 🫒 | ½ cup | Extra-virgin for superior flavor |
| Dijon Mustard 🟡 | 3 tbsp | Smooth variety, not whole grain |
| Honey 🍯 | 2 tbsp | For balancing the herb rub |
| Low-Sodium Chicken Broth 🥣 | 2 cups | For basting during roasting |
| Yellow Onion 🧅 | 2 whole | Peeled and quartered for pan aromatics |
| Carrots 🥕 | 4 whole | Peeled and cut into chunks |
| Celery Stalks 🌿 | 4 pieces | Cut into large pieces for flavor |
The pork loin is the foundation—look for a well-marbled cut from a trusted butcher or Costco for consistent quality. Bone-in adds flavor, but boneless cooks more evenly for a crowd. The herbs must be fresh; dried won't deliver the same punch. If your rosemary stems are woody, strip the leaves and discard the rest. This quantity feeds a generous group, so invest in quality ingredients.
No fresh thyme? Dried thyme at one-third the amount works in a pinch. Out of Dijon? Whole-grain mustard adds texture but changes the rub’s consistency slightly. For a sweeter glaze, swap honey for maple syrup. The broth can be vegetable-based if preferred, but chicken adds depth. Don’t skip the aromatics—they infuse the pan juices with extra flavor.
Store raw pork in the fridge for up to 3 days or freeze for 6-12 months. Leftovers keep 4-5 days refrigerated or freeze beautifully. Reheat slices gently in pan juices to maintain moisture. This roast’s scale makes it perfect for meal prep or a celebratory feast.
Why You'll Love This Recipe
- Set It and Forget: It’s literally just seasoning and oven time—no babysitting required.
- Rosemary-Garlic Magic: That combo of fresh rosemary and garlic gives every bite a deep, savory punch.
- Feeds a Crowd: One 9-pound loin means I can host a dinner party or meal prep for days.
- Leftovers for Days: Honestly, I get at least three more meals out of this—sandwiches, tacos, you name it.
Step-by-step instructions for slow-roasted herb-infused pork loin
This method guarantees tender, aromatic pork with a caramelized crust and juicy interior.
Prepare the Herb Rub and Season the Pork Loin
In a small bowl, combine the 0.25 cup Fresh Rosemary, 0.25 cup Fresh Thyme, 8 cloves Garlic Cloves, 2 tbsp Kosher Salt, and 1 tbsp Black Pepper. Stir in the 0.5 cup Olive Oil, 3 tbsp Dijon Mustard, and 2 tbsp Honey to form a thick paste.
Pat the 9 lb Pork Loin dry with paper towels to ensure the rub adheres properly. Massage the herb mixture all over the pork, pressing it into the meat so it forms an even coating. This step infuses the pork with deep, aromatic flavors that penetrate as it roasts.
Prep the Aromatic Vegetable Bed
Arrange the 2 whole Yellow Onion, 4 whole Carrots, and 4 pieces Celery Stalks in the bottom of a large roasting pan. These vegetables will create a natural rack for the pork, elevating it so hot air circulates evenly underneath.
Pour 1 cup of the 2 cups Low-Sodium Chicken Broth into the pan—this liquid will steam the pork gently, keeping it moist, and form the base of a rich pan sauce. The remaining broth will be used for basting later.
Roast the Pork Loin Low and Slow
Place the pork loin on top of the vegetables in the roasting pan, fat-side up. Preheat the oven to 325°F to ensure even, gentle cooking. Roast the pork uncovered for 2.5 to 3 hours, basting it every 45 minutes with the remaining 1 cup Low-Sodium Chicken Broth.
You’ll know it’s nearing perfection when the external fat cap turns deep golden brown and a meat thermometer inserted into the thickest part reads 145°F. The low temperature ensures the pork stays tender and juicy without drying out.
Rest and Carve for Maximum Tenderness
Once the pork reaches 145°F, transfer it to a cutting board and tent loosely with foil. Let it rest for 20-30 minutes—this critical step allows the juices to redistribute, ensuring every slice is moist and flavorful.
Carve the pork loin into ½-inch thick slices against the grain. The meat should be pale pink in the center with a rich, herb-crusted exterior. Serve immediately with the roasted vegetables and pan juices spooned over the top.
Pro Tips For Making 9 Lb Pork Loin
- Preheat Your Oven: Crank it to 425°F before the pork goes in—I learned this the hard way after a few dry, unevenly cooked loins that needed an extra hour.
- Score the Fat Cap: Cut 1/4-inch slits in a diamond pattern across the fat so the salt, garlic, and roshery actually penetrate instead of just sitting on top.
- Pull at 145°F: Use a meat thermometer and remove it at 145°F internal temp—waiting for 160°F in the oven means it’ll hit 170°F while resting and turn to shoe leather.
- Rest 20 Minutes: Tent it loosely with foil and walk away for a full 20 minutes—this isn’t just for juices, it’s the only way a 9-pounder slices cleanly without falling apart.
Serving suggestions for this dish
Platter Presentation
Arrange thick slices on a large wooden board with the roasted onions, carrots, and celery scattered around. I love how the golden crust contrasts with the deep green herbs. Drizzle pan juices over everything just before serving. 🌟
Southern-Style Sides
Serve with creamy grits and collard greens for a true Georgia spread. The grits soak up the juices beautifully, while the greens add a slightly bitter balance to the rich pork. I always make extra for leftovers.
Fresh Herb Garnish
Sprinkle additional fresh rosemary and thyme over the platter right before bringing it to the table. This adds a pop of color and reinforces the herb flavors. A few lemon wedges on the side brighten up each bite.
Bread Basket
Include a basket of warm biscuits or cornbread to mop up the pan juices. I learned this trick from my grandmother—she always said no good Southern meal is complete without bread.
For extra flair, brush the bread with herb-infused olive oil before serving. ✨
Family-Style Service
Let guests serve themselves directly from the platter. This encourages that communal feel I remember from childhood gatherings. Keep the slices together until serving to maintain moisture.
Nutrition facts
Frequently asked questions
How long does a 9 lb pork loin take to cook?
At 325°F, it takes 2.5 to 3 hours for a 9 lb loin to reach 145°F internally. Baste every 45 minutes with broth for even moisture.
Can I cook a pork loin at a higher temperature?
Higher heat risks drying out this large cut. Stick with 325°F for even cooking without toughening the meat.
What if my pork loin is still pink inside?
Pork is safe at 145°F, even if slightly pink. Use a meat thermometer to confirm doneness—color isn't always reliable.
How do I keep the pork loin moist?
Rest it for 20-30 minutes after roasting. This lets juices redistribute, ensuring tender, flavorful slices.