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This 5 lb pork sirloin roast recipe delivers restaurant-quality results with a crispy herb crust and perfectly juicy core—all in one pan. After years of perfecting roasts for crowds at The Smoky Pig, I've simplified the process without sacrificing flavor. The secret? A dry-brine overnight and precise roasting technique that guarantees tender meat every time.
What sets this recipe apart is the balance between traditional methods and modern efficiency. We'll use a simple herb crust packed with rosemary, thyme, and garlic for depth, while reverse-searing ensures the exterior stays crispy without overcooking the center. The result is meat so tender it practically melts, with a crust that crackles at every bite.
By the time you're done, you'll have a showstopping centerpiece that feeds 6-8 people with minimal effort. The roast rests while you prepare complementary sides—think garlic mashed potatoes or roasted root vegetables—and serves with a bold red wine or crisp apple cider. This is the kind of Sunday dinner that becomes a weekly tradition.
Confession: I've ruined more pork roasts than I'd like to admit, but this method has never failed. The key is patience—letting the meat work with the heat rather than forcing it. Trust the process, and you'll end up with pork so delicious, your guests will ask for the recipe before dessert.
Ingredients for 5 lb pork sirloin roast
Six ingredients transform a simple roast into a showstopping centerpiece—herbs, garlic, and patience do the magic.
| Ingredient | Amount | Notes |
|---|---|---|
| Pork Sirloin Roast 🥩 | 5 lb | Bone-in preferred, trimmed of excess fat |
| Fresh Rosemary 🌿 | ½ cup | Chopped, stems removed |
| Fresh Thyme 🌿 | ¼ cup | Leaves only, stems removed |
| Garlic Cloves 🧄 | 8 cloves | Smashed, skin on for extra flavor |
| Extra-Virgin Olive Oil 🫒 | ¼ cup | For crust and searing |
| Kosher Salt 🧂 | 2 tbsp | Diamond Crystal preferred |
| Freshly Ground Black Pepper 🌶️ | 1 ½ tsp | Freshly cracked for best flavor |
| Dried Mustard 🌶️ | 1 tsp | For depth of flavor |
| Honey 🍯 | 2 tbsp | For glaze (optional) |
| Apple Cider Vinegar 🍎 | 1 tbsp | For dry brine |
| Red Wine 🍷 | 1 cup | Bold dry red for deglazing |
| Unsalted Butter 🧈 | 2 tbsp | For basting |
| Fresh Parsley 🌿 | ¼ cup | Chopped, for garnish |
The pork sirloin is where it all starts. Look for a bone-in roast—it stays juicier and adds flavor. Trim any thick fat caps, but leave a thin layer for moisture. Whole Foods or Costco usually carry great cuts. If you can't find sirloin, pork tenderloin works too, but adjust cooking time. The herbs? Fresh is non-negotiable—dried won't give that same aromatic punch. I always grab extra rosemary; it keeps for months in the freezer if you wrap the stems tightly in foil. The garlic? Smashed cloves infuse more flavor than minced.
No fresh rosemary? Dried at half the amount works in a pinch, but it won't be the same. Out of red wine? Beef broth with a splash of balsamic does the job. The honey glaze is optional but adds that perfect caramelized finish—local honey if you can get it. For the crust, toasted garlic powder can replace fresh if needed, but toast it first in a dry pan for 30 seconds to deepen the flavor. The butter for basting? Full-fat only—low-fat won't give that rich flavor. And if you're feeling fancy, add a pinch of smoked paprika to the crust mix for extra depth.
This roast is all about prep ahead. The dry brine (salt + vinegar) can sit overnight in the fridge—trust me on this. Let the roast sit at room temp for 1 hour before cooking for even cooking. The crust herbs keep best in the fridge for 5 days if wrapped in a damp towel. Leftover roast? Slice thin, reheat with a splash of broth, and serve on sandwiches. It reheats beautifully—better the second day once all the flavors meld. Store leftovers in an airtight container for 4 days or freeze for 3 months.
Why You'll Love This Recipe
- One-Pan Wonder: I swear by this recipe because it’s literally hands-off after the initial prep. Toss the roast with chopped rosemary, thyme, and garlic, drizzle with olive oil, and let the oven do the work—no flipping, no basting, no stress.
- Herb Bomb Flavor: That combo of rosemary and thyme? It’s like a fragrant hug for your taste buds. The garlic cloves roasted right into the meat add this deep, savory punch that makes every bite feel like a little celebration.
- Leftovers That Shine: Between us, the best part is how this roast improves the next day. Slice it thin for sandwiches, shred it into pasta, or cube it for fried rice—it’s the ultimate meal prep star that never gets boring.
- Budget Crowd-Pleaser: Five pounds feeds a family of four and leaves extras for lunches—no sad, half-eaten Tupperware here. And honestly? Pork sirloin is one of those proteins where you get way more bang for your buck than pricier cuts.
Step-by-step instructions for herb-crusted pork sirloin roast
Here's how to transform a simple pork roast into a juicy, herb-infused centerpiece with minimal effort.
Create the Herb Crust and Dry Brine the Roast
In a small bowl, combine the 0.5 cup fresh rosemary, 0.25 cup fresh thyme, 8 smashed garlic cloves, 2 tbsp kosher salt, 1.5 tsp freshly ground black pepper, 1 tsp dried mustard, and 1 tbsp apple cider vinegar. Mix well to distribute the seasonings evenly. This blend creates a fragrant crust that will cling beautifully to the meat.
Pat the 5 lb pork sirloin roast completely dry with paper towels—this is crucial for developing that perfect crust. Rub the herb mixture all over the roast, pressing it into the meat so it adheres. Place the roast on a wire rack set inside a rimmed baking sheet and refrigerate uncovered for 12-24 hours. This dry-brine process ensures maximum flavor penetration and helps create a crispy exterior while keeping the interior juicy.
Sear the Roast for Maximum Flavor
Remove the roast from the refrigerator and let it sit at room temperature for 30 minutes before cooking. Preheat your oven to 425°F and heat 2 tbsp unsalted butter and 0.25 cup extra-virgin olive oil in an oven-safe skillet over medium-high heat. Once the butter foams, place the roast in the skillet, searing it on all sides until deep golden brown—about 4-5 minutes per side. This step locks in juices and creates a flavorful crust.
Here's the thing—don't rush this searing. You'll know it's ready when the crust releases easily from the pan. If it sticks, let it cook a bit longer. The roast will continue cooking in the oven, so you don't need to fully cook it at this stage. Transfer the skillet to the preheated oven.
Roast to Juicy Perfection
Roast the pork for 45-50 minutes until the internal temperature reaches 145°F (use a meat thermometer inserted into the thickest part of the roast). The roast is done when it's fork-tender and the juices run clear. The high initial temperature helps create a crispy exterior while the lower internal temperature ensures a juicy core.
About 15 minutes before the roast is done, brush it with the 2 tbsp honey (if using) mixed with 1 cup red wine. This glaze adds a beautiful caramelized finish and enhances the herb flavors. The wine will reduce quickly, creating a sticky, flavorful crust. Keep an eye on it—you want it to be glossy but not burnt.
Rest and Serve for Maximum Juiciness
Remove the roast from the oven and transfer it to a cutting board. Tent loosely with foil and let it rest for 20-30 minutes before slicing. This resting period is critical—it allows the juices to redistribute throughout the meat, ensuring every slice is moist and flavorful. Real talk: Skipping this step means dry meat. Don't skip it (I learned the hard way).
Slice the roast against the grain into ½-inch thick portions. Garnish with 0.25 cup chopped fresh parsley and serve immediately. The result should be a beautifully browned, herb-crusted roast with a juicy, tender interior that practically melts in your mouth. Pair it with roasted vegetables or crusty bread to soak up those delicious juices.
Pro Tips For Making 5 Lb Pork Sirloin Roast
- SEAR HARD BEFORE ROASTING: I learned this the hard way—skipping the sear means flavor gets stuck in the middle. Get that roast screaming hot in olive oil for 4-5 minutes per side until it’s deep golden. The crust locks in juices and carries all that garlic-herb flavor you’re working so hard to build.
- SMASH THOSE GARLIC CLOVES: Don’t just sprinkle minced garlic on top—peel those cloves, smash them flat with the side of your knife, and tuck them directly into slits cut into the roast. They’ll infuse the meat like nothing else, and you won’t waste flavor on the pan. (Yes, even if you’re impatient like me.)
- REST IT UNDER FOIL: Cutting into that roast too soon is the fastest way to ruin it. Transfer it to a tray, loosely tent with foil, and let it sit for 10-15 minutes. The juices redistribute instead of pooling out, and the meat stays tender—no sad, dry slices here.
- USE A MEAT THERMOMETER: Guessing doneness with pork is how you end up with either rubbery or raw meat. Aim for 145°F internal temp, then let it rest—no peeking! I was skeptical until I tried it, and now I never cook pork without one. (Your future self will thank you.)
Wine and beer pairings for this 5 lb pork sirloin roast
Bold Red Wine
A full-bodied Cabernet Sauvignon from Napa Valley is my go-to pairing for this herb-crusted roast. The tannins cut through the richness of the pork while the dark fruit notes complement the rosemary and thyme. Look for a 2018 or newer vintage—older wines can taste too earthy. I love Caymus Vineyards or Opus One for special occasions. 🍷
Lighter Rosé
For a refreshing contrast, a dry Provence-style rosé works beautifully. The crisp acidity cleanses your palate between bites of the herb-crusted meat. Try Domaine Ott or Château d'Esclans—both have enough body to stand up to the pork. Serve slightly chilled (50-55°F) for the best experience. Perfect for warmer weather gatherings.
Apple Cider Beer
If you prefer beer, an American cider ale like Angry Orchard or Strongbow brings sweet-tart balance. The apple notes mirror the vinegar in our dry brine, while the effervescence cuts through the richness. For a local twist, try Woodchuck Hard Cider—it's a crowd-pleaser that pairs surprisingly well with pork.
Spiced Wine Pairing
For a festive touch, warm 1 cup red wine with 1 cinnamon stick, 3 whole cloves, and 1 star anise for 10 minutes. Strain and serve alongside the roast. The spices echo the dried mustard in our crust while adding warmth. This is a game-changer for holiday meals—trust me, your guests will ask for the recipe. 🔥
Non-Alcoholic Options
Don't drink? No problem. A sparkling cranberry spritzer (mix 1 cup cranberry juice with 4 oz ginger ale) delivers bright acidity. For something richer, try sparkling apple cider—the bubbles keep the palate fresh. Both options highlight the herbaceous notes without overpowering them.
Regional Recommendations
In the Southeast, where I grew up, we often paired roasts with sweet tea—the natural sweetness balances the savory herbs. For a Georgia twist, try peach iced tea** with a splash of lemon. These local drinks add a nostalgic touch that complements the roast perfectly. 💛
Nutrition facts
Frequently asked questions
Why does the recipe call for dry-brining overnight?
The 12-24 hour dry brine works magic by letting the salt and vinegar penetrate deep into the meat. This creates a perfectly seasoned interior while developing that crispy exterior crust. It also helps retain moisture—no more dry roast surprises! The apple cider vinegar adds brightness that balances the richness.
Can I use bone-in or bone-out pork sirloin?
Bone-in is ideal—it stays juicier and adds flavor during cooking. If you must use boneless, trim any excess fat and expect 5-10 minutes less cooking time. The bone acts like a thermometer, helping regulate internal temperature. For a 5 lb bone-in roast, stick to the recipe times exactly.
How do I know when the roast is fully cooked?
Use a meat thermometer inserted into the thickest part—it's done at 145°F. The juices should run clear when pierced, and the meat should be fork-tender. Never rely on color alone! For extra precision, start checking 10 minutes before the estimated time. The crust will be deep golden brown by then.
What if my roast turns out dry?
Most likely, you skipped the resting time or overcooked it. Next time, let it rest 20-30 minutes before slicing—this redistributes juices. For reheating dry slices, try slicing thin and warming with 1 tbsp broth per slice in a 350°F oven for 10 minutes. The moisture will revive the texture beautifully.
Can I make this roast ahead of time?
Cook it up to 140°F (about 30 minutes before full doneness), then refrigerate. Finish cooking in a 325°F oven until 145°F. The flavors actually improve overnight—this is how we do it at The Smoky Pig. Store in an airtight container for up to 4 days or freeze for 3 months.