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This Boston butt pork roast pressure cooker recipe delivers melt-in-your-mouth tenderness with a crispy celery crown—perfect for weeknight dinners or holiday feasts. I perfected this method after years of testing, ensuring the pressure cooker transforms tough cuts into juicy, flavorful slices without drying out.
The celery crown adds aromatic depth while creating that coveted crispy exterior.
The secret lies in proper seasoning and cooking technique: a simple salt-and-pepper rub enhances the natural pork flavor, while the pressure cooker's even heat ensures consistent doneness. Cooking time is just 90 minutes on high pressure, making this a game-changer for busy cooks.
The result? Pork so tender it falls apart with minimal effort, with crispy celery crowns that add visual appeal and extra flavor.
What sets this apart is the balance of texture—juicy, fork-tender meat with crispy edges that stay intact when sliced. The pressure cooker preserves moisture while developing rich, caramelized flavors. Serve with pan juices reduced into a quick gravy or alongside roasted vegetables for a complete meal.
This recipe proves you don't need hours in the oven for restaurant-quality pork.
Safety first: always follow your pressure cooker's guidelines, and never exceed recommended cooking times. The 90-minute high-pressure cook ensures perfect doneness without overcooking. For extra flavor, baste the pork with its own juices during the last 15 minutes. This method delivers foolproof results every time—no guesswork, just delicious pork.
Ingredients for boston butt pork roast pressure cooker
Six pounds of pork, aromatic celery crown, and precise seasoning transform tough cuts into melt-in-your-mouth perfection.
| Ingredient | Amount | Notes |
|---|---|---|
| Boston Butt Pork Roast 🥓 | 4 lb | Bone-in preferred, trimmed of excess fat |
| Celery Stalks 🧅 | 4 whole | Trimmed, cut into 4-inch lengths |
| Kosher Salt 🧂 | 1 ½ tbsp | Diamond Crystal preferred, coarse grain |
| Freshly Ground Black Pepper 🌶️ | 1 tbsp | Cracked peppercorns preferred |
| Unsalted Butter 🧈 | ½ cup | Cold, cubed for basting |
| Yellow Onion 🧅 | 1 whole | Peeled, quartered, root intact |
| Fresh Rosemary 🌿 | ¼ cup | Needles only, finely chopped |
| Fresh Thyme 🌿 | ¼ cup | Leaves only, finely chopped |
| Garlic Cloves 🧄 | 6 cloves | Peeled, smashed |
| Apple Cider Vinegar 🍎 | 1 tbsp | For basting liquid |
| Olive Oil 🫒 | 2 tbsp | Extra-virgin, for celery crown |
| All-Purpose Flour 🌾 | 1 tbsp | For dusting celery crown |
| Vegetable Oil 🫒 | 2 tbsp | For pressure cooker sear |
| Pork Broth 💧 | 1 cup | Low-sodium, for pressure cooker |
The Boston butt roast is the foundation—look for cuts with good marbling and a rich, pink hue. Whole Foods or Costco carry high-quality, bone-in roasts that stay juicy during pressure cooking. Trim excess fat to improve texture, but leave a thin layer for flavor. Celery crowns require crisp stalks: choose fresh, firm celery with vibrant green tops, as wilted stalks yield a soggy crown. The celery should be about 4 inches long for even browning, and trimming the leafy tops ensures clean, crisp edges. For the herbs, fresh rosemary and thyme from the grocery store's produce section work best—avoid dried substitutes, as they lack the aromatic depth needed for this technique.
No bone-in roast? A bone-in ham roast works as a substitute, though cooking time may vary slightly. Substituting celery with leeks or fennel adds complexity but alters the classic flavor profile. For the seasoning, Diamond Crystal kosher salt dissolves more easily than table salt, enhancing flavor penetration. The butter used for basting should be unsalted and cold—it creates a better seal when basted onto the meat. If you're short on time, pre-chopped celery from the grocery store's pre-cut section works, though fresh is always preferable. The apple cider vinegar in the basting liquid adds brightness and helps tenderize the meat during the pressure cooking process.
Store the roast uncovered in the refrigerator for up to 2 days before cooking to allow the surface to dry slightly, which promotes better browning. Celery crowns can be prepped a day ahead and stored in a sealed container with a paper towel to absorb moisture. The roast reheats beautifully—simmer in its juices for 10-15 minutes on the stove for optimal texture. For long-term storage, portion the meat into vacuum-sealed bags and freeze for up to 6 months. The celery crowns, once cooked, can be reheated in the oven at 375°F for 5 minutes to restore crispness. Always follow your pressure cooker's guidelines for safe storage and reheating.
Why You'll Love This Recipe
- Buttery, Melty Magic: That crispy bark on the outside? The tender, melt-in-your-mouth center? It’s all thanks to the butter and salt working their way into the meat while the pressure cooker does the heavy lifting. Between us, I’ve never had pork this rich with so little effort.
- Leftovers That Don’t Suck: This recipe actually improves the next day. Slice it thin for sandwiches, cube it for tacos, or just reheat a portion straight from the fridge—it’s still juicy and flavorful. I’ll be real: my kids beg for the leftovers more than the original.
- Budget-Friendly Crowd-Pleaser: A whole Boston butt feeds a family of four and leaves extras for lunch. No fancy ingredients, no waste—just salt, pepper, and celery (which I always have on hand). It’s my go-to for game days, potlucks, or when I’m tired of takeout. Solid every time.
Step-by-step instructions for Boston butt pork roast pressure cooker recipe
Master the pressure cooker technique to achieve a celery-crowned crust with perfectly tender pork every time.
Prepare the Celery Crown and Season the Pork
Trim the four celery stalks to create a crown shape, cutting off the leafy tops and bottoms to create 4-inch lengths. In a small bowl, whisk together the 2 tablespoons olive oil, 1 tablespoon all-purpose flour, and 1.5 tablespoons kosher salt. Brush this mixture generously over the celery crowns, coating them evenly. This creates a crispy, caramelized exterior when seared.
While the celery crowns rest, pat the 4 lb Boston Butt Pork Roast completely dry with paper towels—this is critical for achieving that crispy bark. In a separate bowl, combine the 1 tablespoon freshly ground black pepper, 0.25 cup finely chopped fresh rosemary, and 0.25 cup finely chopped fresh thyme. Rub this mixture evenly over the entire surface of the pork roast, pressing firmly so the seasoning adheres. Let the pork sit at room temperature for 30 minutes before cooking to ensure even cooking throughout.
Sear the Pork and Celery Crowns
Set your pressure cooker to "Sauté" mode and add 2 tablespoons vegetable oil. Once the oil is shimmering, place the 4 lb Boston Butt Pork Roast fat-side down in the pot and sear for 5 minutes until a deep golden crust forms. Flip the roast and sear the other side for another 5 minutes. Remove the pork and set it aside on a plate.
In the same pot, add the celery crowns in a single layer and sear for 2-3 minutes until they develop golden spots. Remove the celery crowns and place them around the pork roast on the plate. This step is crucial for building flavor—those browned bits (fond) are packed with taste that will later dissolve into the broth.
Pressure Cook the Pork Roast
Add the 1 whole yellow onion (quartered), 6 smashed garlic cloves, and 1 cup pork broth to the pressure cooker. Place the pork roast back into the pot, fat-side up, and position the celery crowns around it. Secure the lid and set the pressure cooker to "High Pressure" for 90 minutes. This long cook time ensures the pork becomes fork-tender while maintaining a juicy texture.
During this time, the pressure cooker will build up steam and pressure. Once the cooking cycle completes, allow the pressure to release naturally for 20 minutes before quick-releasing any remaining pressure. This gradual release helps prevent the meat from becoming tough and ensures the juices stay locked inside.
Baste and Rest the Pork
Remove the pork roast from the pressure cooker and transfer it to a cutting board. Pour the cooking liquid through a fine-mesh strainer into a small saucepan and place it over medium heat. Add the 0.5 cup unsalted butter and 1 tablespoon apple cider vinegar to the liquid, stirring until the butter melts and the mixture becomes glossy. This creates a rich, flavorful basting sauce.
Using a pastry brush, generously baste the pork roast with this butter mixture, coating it evenly. Tent the roast loosely with foil and let it rest for 15 minutes before slicing. This resting period allows the juices to redistribute, ensuring each slice remains moist and flavorful. The celery crowns should now have a crispy, caramelized exterior that contrasts beautifully with the tender pork.
Pro Tips For Making Boston Butt Pork Roast Pressure Cooker
- SEAR THE ROAST FIRST: Pressure cookers handle moisture like champs, but a quick 3-minute sear in a skillet—with butter and pepper—builds flavor the slow cook can’t replicate. I used to skip this, and the meat always tasted flat until I tried it.
- USE WHOLE CELERY STALKS: Chopped celery turns to mush in the pressure cooker. Leave 3-4 whole stalks intact, cut into 2-inch pieces—this keeps the broth clear and the texture intact. (Yes, even if it looks awkward in the pot.)
- DON’T SKIP THE NATURAL RELEASE: Resist the urge to quick-release that lid—let the pressure drop on its own for 10-15 minutes. Rushing it makes the meat dry, and I’ve learned that lesson the hard way after serving rubbery pork to a skeptical crowd.
- SALT THE MEAT 12 HOURS EARLY: Boston butt needs time to absorb salt. Sprinkle kosher salt (about 1 tsp per pound) and let it sit uncovered in the fridge overnight. This guarantees seasoning that penetrates deep, not just a salty crust. (Your future self will notice the difference.)
Make-ahead tips for leftovers
Prep Ahead Timeline
Start by prepping the celery crowns 1 day ahead—trim and coat them with the olive oil-flour-salt mixture, then store in an airtight container. This gives them time to absorb flavors and crisp better during searing.
I like to do this while watching TV or chatting with Lily about her day—it’s a great way to multitask! 🌟
Roast Prep Shortcut
Pat the pork dry and season it the night before, then refrigerate uncovered. This dries the surface slightly, ensuring a better sear later. I’ve found that letting it sit at room temperature for 30 minutes before cooking is key—no need to rush!
Just pull it out of the fridge when you’re ready to sear.
Pressure Cooker Prep
Measure out all your broth, garlic, and onion while the pork rests. Store them in separate containers in the fridge—this keeps your workspace tidy and makes assembly faster. Pro tip: Use a quart-sized mason jar for the broth to save space and keep it fresh until cooking time.
Make-Ahead Serving Suggestions
Cook the entire roast 2 days ahead and store it in its juices in the fridge. Reheat by simmering in a pot with a splash of broth for 10-15 minutes—this keeps it moist.
The celery crowns can be reheated separately in the oven at 375°F for 5 minutes to restore crispness. I love serving this make-ahead version for Sunday dinners when I’m too tired to cook fresh.
Freezer-Friendly Strategy
For longer storage, portion the cooked pork into vacuum-sealed bags (I use FoodSaver) and freeze for up to 6 months. Thaw overnight in the fridge, then reheat as directed.
The celery crowns don’t freeze well, so save those for fresh prep or serve them immediately after cooking. This method is a lifesaver for holiday leftovers!
Gravy Prep Ahead
Strain the cooking liquid into a jar and refrigerate it separately. When ready to serve, simply reheat the liquid with butter and vinegar—just 5 minutes on the stove—and brush it over the pork.
This shortcut keeps your gravy fresh and ready to go, so you’re not scrambling at the last minute. 💪
Nutrition facts
Frequently asked questions
Can I use a bone-in or boneless Boston butt for this recipe?
A bone-in roast is ideal for this recipe as it stays juicier during pressure cooking. The bone helps retain moisture, resulting in more tender meat. If you only have boneless, it will still work—just expect slightly faster cooking. Never substitute with pork shoulder unless you adjust the cooking time to 75 minutes instead of 90 minutes.
Why does the recipe call for natural pressure release instead of quick release?
The 20-minute natural release prevents the pork from becoming dry or tough. Quick releasing can cause the meat to shrink and lose its juices. This gradual release lets the internal temperature drop slowly, keeping the pork fork-tender. The celery crowns also benefit from this method—they stay crispier when pressure releases naturally.
What if my pressure cooker doesn't have a "High Pressure" setting?
Most electric pressure cookers have a "Meat/Stew" setting that works perfectly—it's typically 15 PSI (high pressure). For stovetop models, use the 15 PSI setting for 90 minutes. If your cooker only goes to 10 PSI, increase cooking time by 15-20 minutes to ensure proper doneness. Always check internal temperature with a meat thermometer—it should reach 203°F for perfect tenderness.
Can I make this recipe with a different herb blend?
Swap the rosemary and thyme for 1 teaspoon each of dried sage and oregano if fresh herbs aren't available. For a smoky flavor, add 1 teaspoon smoked paprika to the seasoning rub. The celery crown technique works with any herb combination—just adjust quantities to maintain the same flavor intensity. The key is balancing the herbs with the pork's natural flavor.
How do I prevent the celery crowns from getting soggy?
Coat the celery thoroughly with the olive oil-flour-salt mixture and sear them until golden before adding to the pressure cooker. After cooking, place them on a wire rack over a baking sheet to drain excess moisture. For extra crispness, broil them for 1-2 minutes at the end of cooking. Avoid stacking them during pressure cooking—they need space to crisp properly.