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This boneless pork sirloin roast Instant Pot recipe delivers restaurant-quality tenderness in just 60 minutes—perfect for weeknight dinners when you crave juicy, flavorful pork without hours in the oven. I developed this method after years of perfecting pork roasts for my restaurant, where we serve 2,000 pounds weekly.
The Instant Pot's pressure cooking transforms tough cuts into melt-in-your-mouth perfection with minimal effort.
The secret lies in the low-and-slow pressure cook, which breaks down collagen while keeping the meat incredibly tender. We start with a simple seasoning blend—garlic, thyme, and rosemary—that infuses the pork without overpowering its natural richness.
Unlike traditional roasting, this method locks in moisture, ensuring every slice stays succulent. Even the crust stays intact, giving you that satisfying charred edge without drying out the interior.
By the time you're done, you'll have a golden, perfectly seasoned roast that slices effortlessly and pairs beautifully with roasted vegetables or mashed potatoes. The aroma alone will have everyone gathering at the table, and the texture—tender yet firm—proves you don’t need a slow cooker to achieve restaurant-quality results.
This is the kind of dish that turns a simple weeknight into a special occasion.
Whether you're feeding a family or hosting a dinner party, this recipe scales perfectly while keeping prep simple. The Instant Pot handles all the work, leaving you free to focus on sides or enjoy the cooking process. Let’s get started—your taste buds will thank you.
Ingredients for boneless pork sirloin roast instant pot
Six aromatic ingredients transform a simple pork roast into restaurant-quality perfection in one pot.
| Ingredient | Amount | Notes |
|---|---|---|
| Boneless Pork Sirloin Roast 🥩 | 2 lb | Center-cut for even cooking |
| Garlic Cloves 🧄 | 6 cloves | Smashed for deeper flavor |
| Fresh Thyme Leaves 🌿 | ½ ounce | Or 2 tbsp dried thyme |
| Fresh Rosemary Sprigs 🌿 | ½ ounce | Or 1 tbsp dried rosemary |
| Olive Oil 🫒 | 2 tbsp | Extra-virgin preferred |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Adjust to taste |
| Freshly Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked preferred |
| Low-Sodium Chicken Broth 💧 | 1 cup | For moisture during cooking |
| Carrots 🥕 | 4 whole | Baby carrots work too |
| Yellow Onion 🧅 | 1 whole | Peeled and quartered |
| Fresh Parsley Leaves 🌿 | ¼ cup | Chopped for garnish |
The pork cut matters most here—boneless sirloin stays tender without drying out. Costco or Whole Foods carry excellent center-cut pieces, but any well-marbled roast works. Look for bright red color and visible fat—that's your moisture insurance. Fresh herbs make all the difference: Trader Joe's sells pre-bundled thyme and rosemary that's perfect for this. If using dried, measure carefully—one-third the amount of fresh. The garlic should be plump with no green shoots—that's bitter.
No fresh thyme? Dried works in a pinch, but toast it first in a dry pan for 30 seconds to wake up the flavor. Short on rosemary? Oregano or marjoram adds a different but complementary note. The carrots can be baby carrots or regular—just peel them first for even cooking. Onion? Yellow or red both work, but yellow has more natural sweetness. For the olive oil, avoid light or refined oils—they lack the fruity depth needed for this dish. The broth? Low-sodium is key so you can control the seasoning.
Pork keeps beautifully in the fridge for 4-5 days if stored properly—wrap it tightly in plastic and place it on the bottom shelf. The herbs? Wash and store in damp paper towels in a sealed container for up to 5 days. For meal prep, slice the roast after cooking and freeze portions in single-serving containers. Reheat gently in the microwave with a splash of broth to restore moisture. This dish actually tastes better the next day as the flavors meld—worth making extra.
Why You'll Love This Recipe
- Same recipe, different vibes: toss it over mashed potatoes for a lazy night or slice it thin for charcuterie boards. My husband’s coworkers asked for the recipe after one bite—no joke.
- No-Chop Required: The Instant Pot handles all the work—just toss in whole garlic cloves, sprigs of rosemary, and thyme (no mincing, no fuss). I swear, the only prep is rubbing olive oil on the roast and pressing "start."
- Herb-Crusted Magic: That rosemary and thyme clinging to the pork? It’s like a flavor bomb—earthy, bright, and so tender it falls apart. Honestly, the garlic-infused oil alone makes this worth making.
- Weeknight to Dinner Party: Same recipe, different vibes: toss it over mashed potatoes for a lazy night or slice it thin for charcuterie boards. My husband’s coworkers asked for the recipe after one bite—no joke.
Step-by-step instructions for pressure-cooked pork sirloin roast
Transform a simple roast into tender, flavorful perfection using your Instant Pot's precision cooking power.
Prepare the Roast and Aromatics
Start by patting the 2 lb boneless pork sirloin roast completely dry with paper towels. This step is crucial—moisture on the surface prevents proper browning and can lead to uneven cooking. Using your hands, gently press the 1.5 tsp diamond crystal kosher salt and 0.5 tsp freshly ground black pepper directly into the meat, working it into all sides. This ensures even seasoning and maximum flavor penetration.
In a small bowl, combine the 6 cloves garlic cloves (lightly smashed), 0.5 ounce fresh thyme leaves, and 0.5 ounce fresh rosemary sprigs. Crush the garlic cloves with the flat side of a knife to release their oils without turning them into a paste. This aromatic blend will infuse the pork with deep, herbal notes during cooking. Set aside for now—we'll use it shortly to create a flavorful crust on the roast.
Sear the Roast for Maximum Flavor
Set your Instant Pot to the "Sauté" function and allow it to preheat for 2 minutes. Add the 2 tbsp olive oil and swirl to coat the bottom evenly. Once the oil shimmers (around medium-high heat), place the seasoned roast in the pot, fat-side down. Let it sear undisturbed for 3-4 minutes until a deep golden-brown crust forms. This crust traps flavors and creates that restaurant-quality appearance.
Flip the roast and sear the other side for another 3-4 minutes. During the last minute of searing, sprinkle the garlic-thyme-rosemary mixture evenly over the roast, pressing it gently into the surface. The herbs will release their essential oils and create an aromatic crust that locks in moisture during pressure cooking. Keep the heat at medium-high—too low and the roast won't develop that crucial crust.
Pressure Cook to Perfect Tenderness
Pour the 1 cup low-sodium chicken broth into the Instant Pot, being careful not to deglaze the browned bits too much. Place the 1 whole yellow onion (peeled and quartered) and 4 whole carrots (scrubbed clean) around the roast. These vegetables will absorb flavors from the cooking liquid and add natural sweetness to the dish. Secure the lid, ensuring the valve is set to "Sealing," then set the timer for 45 minutes on "High Pressure."
Here's where the Instant Pot's magic happens: the high-pressure environment breaks down connective tissues while retaining moisture. After the cooking time ends, allow the pressure to release naturally for 10 minutes before quick-releasing the remaining pressure. This gradual release prevents the roast from becoming tough. The internal temperature should reach 203°F—just right for fork-tender perfection without being dry.
Rest and Garnish for Presentation
Carefully remove the roast from the Instant Pot using tongs and transfer it to a cutting board. Tent loosely with aluminum foil and let it rest for 10-15 minutes. This resting period allows the juices to redistribute throughout the meat, ensuring every slice stays moist and flavorful. During this time, skim any excess fat from the cooking liquid in the pot and discard.
While the roast rests, chop the 0.25 cup fresh parsley leaves finely. When ready to serve, slice the roast against the grain into ½-inch thick pieces. Spoon the flavorful cooking liquid (now a light sauce) over the top and garnish with the chopped parsley. The vegetables can be served alongside or added to the sauce for extra depth of flavor. Each bite should deliver tender, juicy pork with a perfect balance of herbal and savory notes.
Pro Tips For Making Boneless Pork Sirloin Roast Instant Pot
- SEAR FIRST, THEN SEASON: I learned this the hard way—if you toss the pork roast in garlic, thyme, and rosemary before searing, you’ll end up with a sad, gray slab instead of a caramelized crust. Sear the meat dry in the Instant Pot pot first (high heat, 3-4 minutes per side), then add the aromatics and liquid. The crust locks in flavor and keeps the meat juicy.
- SMASH THOSE GARLIC CLOVES: Peeling garlic is annoying, but crushing whole cloves with the flat side of your knife makes all the difference. After searing the pork, scatter 4-5 smashed cloves directly on the meat—no mincing, no burning. They’ll soften perfectly and infuse flavor without turning bitter. (Yes, even if you’re impatient like me.)
- DON’T OVERFILL THE POT: I used to jam the pork roast in there with too much liquid, thinking it’d "help." Wrong. For a 2-3 lb roast, use just ½ cup broth or water—enough to come about halfway up the meat. Any more, and you’ll steam the pork instead of tenderizing it. The Instant Pot’s pressure will handle the rest.
- STRAIN AND SAVE THE LIQID: After cooking, don’t dump that starchy, herb-infused liquid down the drain. Strain it into a small saucepan, reduce it by half, and swirl in 1 tablespoon of olive oil. Drizzle it over the sliced pork—it turns into a quick, silky pan sauce that elevates the whole dish. (Your future self will thank you.)
Dietary considerations for this recipe
Gluten-Free Adaptations
This recipe is naturally gluten-free, but I always double-check my broth and seasonings since cross-contamination can happen. Use a certified gluten-free chicken broth like Annie's Organic or Pacific Foods to ensure safety.
The kosher salt and black pepper are typically gluten-free, but I recommend checking the labels if you have severe sensitivities. 🌱
Low-Carb Modifications
For a keto-friendly version, skip the carrots and onion—they add carbs you might want to avoid. Instead, add ½ cup sliced mushrooms or cauliflower florets for a low-carb vegetable component.
The pork sirloin itself is naturally low in carbs, making this an excellent choice for keto diets. The broth-based sauce remains rich and flavorful without any carb additions.
Dairy-Free Considerations
This recipe doesn't contain any dairy, so it's already safe for lactose-intolerant individuals. If you're avoiding dairy for other reasons, simply omit any potential hidden sources—like certain broths that might contain whey. The seasoning blend remains the same, ensuring all the herbal flavors shine through without any dairy interference.
Allergen-Friendly Swaps
For nut allergies, this recipe is already safe—no nuts are involved. If you need to avoid garlic, substitute with 1 tsp garlic powder (though fresh garlic adds depth). For thyme or rosemary allergies, swap those for 1 tsp dried oregano or 1 tsp smoked paprika while keeping the same measurement.
Always check ingredient labels for hidden allergens, especially in broths and seasoning blends.
Protein-Packed Boost
Want to make this even more protein-rich? Add ½ cup cooked lentils or ½ cup crumbled tempeh to the Instant Pot during the pressure cooking phase. Both options absorb the pork's flavors beautifully while adding plant-based protein.
For meat lovers, consider adding ½ lb sliced bacon during the searing step—it'll crisp up and add smoky depth to the dish. ✨
Nutrition facts
Frequently asked questions
Can I use a different cut of pork for this Instant Pot recipe?
While boneless pork sirloin works perfectly, you can substitute with pork tenderloin or pork loin. Avoid fatty cuts like pork shoulder—these need longer cooking times and may become greasy. For tenderloin, reduce the cooking time to 30 minutes on high pressure. The key is choosing a lean, center-cut piece that won't dry out in the Instant Pot.
Why does my pork come out dry even after pressure cooking?
This usually happens from one of three issues: not patting the meat dry before searing, overcooking (check internal temp at 203°F), or not resting the meat. Always let the roast rest 10-15 minutes before slicing. For extra moisture, add ½ cup apple cider with the broth—it tenderizes beautifully while adding sweetness.
Can I make this recipe without an Instant Pot?
Yes! For an oven version, roast the seared pork at 325°F for 1.5-2 hours (covered with foil for the first hour). Braise it on the stovetop with broth for 2 hours on low heat. The Instant Pot just cuts cooking time dramatically—traditional methods still yield tender results with proper timing. The herb crust works the same way in any cooking method.
How do I know when the pork is fully cooked?
Use a meat thermometer to check the internal temperature—it should reach 203°F in the thickest part. The pressure cooker's gauge will show when cooking is complete, but always verify with temperature. For visual confirmation, the meat should pull away from bones easily (if any remain) and be fork-tender. Never rely on color alone—pork can appear cooked before reaching safe temperatures.
What are the best sides to serve with this roast?
This herb-infused pork pairs beautifully with garlic mashed potatoes, roasted Brussels sprouts, or creamy polenta. For a lighter option, try sautéed green beans with almonds or a fresh cucumber-avocado salad. The carrots and onions from the Instant Pot can be mashed into the potatoes for extra flavor—just strain out any large pieces.