Boston Butt Pork Roast Pressure Cooker Recipe: Clockwork-Sear Crispy Celery Crowns Over Smoky Gravy

This Boston butt pork roast pressure cooker recipe delivers restaurant-quality tenderness in a fraction of the time—no dry, stringy meat here. The secret lies in the clockwork-sear technique that creates crispy celery crowns while keeping the interior juicy and fall-apart tender.

I perfected this method after years of holiday cooking, where slow-roasted pork always left me scrambling to avoid overcooking.

The pressure cooker transforms tough cuts into melt-in-your-mouth perfection using just 30 minutes of active cooking time (plus resting). We start with a dry brine overnight to lock in moisture, then sear the roast in batches to build deep, caramelized flavor.

The celery crowns—crispy on the outside, tender inside—are the showstopper, adding a touch of elegance without complicating the process.

What you'll end up with is a smoky, richly seasoned roast that practically falls apart at the touch, served with a velvety gravy made from the pan drippings.

The pressure cooker ensures even cooking and maximum flavor extraction, while the crispy celery crowns add a textural contrast that makes every bite special. This is the kind of pork roast that turns weeknight dinners into memorable meals.

Perfect for Sunday suppers, holiday gatherings, or when you need a stress-free centerpiece. The recipe includes safety tips for pressure cooking and carving techniques to ensure you serve it like a pro. Let's get started on making this crowd-pleaser your new go-to recipe.

Ingredients for boston butt pork roast pressure cooker

Six pounds of pork, crispy celery crowns, and smoky gravy—this pressure cooker roast delivers restaurant-quality results at home.

The Boston butt is the star here—look for a piece with good marbling and a thick fat cap for juiciness. Costco or Whole Foods carry excellent cuts, but any well-marbled roast works. The fat cap helps create crispy celery crowns, so don't trim it! For the celery, grab the thickest stalks you can find—they hold up better during searing. Fresh herbs are non-negotiable: the thyme and rosemary add that deep, woodsy aroma that makes this dish feel special. If you're short on time, dried herbs at half the amount will work, but fresh is worth the extra minute.

No apple cider vinegar? Substitute white vinegar or lemon juice for the celery crowns—just add it after searing. The beef broth can be swapped for chicken broth if needed, though it'll lose some richness. For the gravy, if you're avoiding gluten, use cornstarch instead of flour (mix 2 tbsp cornstarch with 2 tbsp cold water). The olive oil matters here—use something with a high smoke point like avocado oil or light olive oil for searing. And trust me on the cold butter for gravy: it creates those beautiful butter blobs that make gravy irresistible.

The pork keeps beautifully—3-4 days in the fridge if stored properly. Wrap it tightly in parchment paper, then foil, to preserve moisture. For leftovers, reheat in the pressure cooker with a splash of broth to keep it tender. The celery crowns are best served fresh, but you can reheat them in the oven at 375°F for 5-10 minutes if needed. Gravy freezes wonderfully—just thaw and reheat gently. I always make extra gravy; it disappears faster than the roast itself!

Step-by-step instructions for Boston butt pork roast pressure cooker recipe

Here's how to transform a tough Boston butt into melt-in-your-mouth perfection with crispy celery crowns.

Start by removing the pork roast from the fridge and letting it sit at room temperature for 30 minutes. Pat it dry thoroughly with paper towels—this is crucial for that crispy bark. In a small bowl, mix the 0.5 cup kosher salt and 2 tablespoons freshly ground black pepper.

Generously rub this seasoning all over the roast, including inside the cavity. Let it sit uncovered on a wire rack for 1 hour in the fridge. This dry-brining step ensures maximum flavor penetration and that signature crispy exterior. While it seasons, heat 0.25 cup olive oil in your pressure cooker over medium-high heat until shimmering.

Place the roast fat-side down in the hot oil and sear for 5 minutes without moving it. You'll see the fat render and the skin begin to crisp. Flip and sear the other side for another 5 minutes. This initial sear locks in juices and builds deep flavor. Transfer the roast to a plate and set aside.

In the same pressure cooker, add the 12 whole celery sticks and 0.5 cup apple cider vinegar. Bring to a boil over high heat for 3 minutes until the celery crowns blanch and begin to soften. Remove and set aside with the roast.

In a small skillet, heat 1 tablespoon olive oil over medium heat. Add the 1 whole yellow onion sliced into rings, 6 lightly smashed garlic cloves, 4 thyme sprigs, and 2 rosemary sprigs. Sauté for 5 minutes until the onion becomes translucent and fragrant. This aromatic base forms the flavor foundation for your gravy.

Add these sautéed aromatics to the pressure cooker along with the 2 cups beef broth. Scrape up any browned bits from the bottom—they're packed with flavor. Return the celery crowns and pork roast to the pressure cooker, placing the roast fat-side up.

Secure the pressure cooker lid and cook on high pressure for 90 minutes. The pressure cooker works magic here, breaking down connective tissue while keeping the meat incredibly juicy. Resist the urge to peek—each time you release pressure, you add valuable cooking time back.

When the cook time is complete, allow the pressure to release naturally for 15 minutes, then quick-release any remaining pressure. Carefully remove the lid, being mindful of the hot steam. The pork should be fork-tender with an internal temperature of 203°F—this probe-tender stage ensures every bite melts in your mouth.

Transfer the roast to a cutting board and tent loosely with foil. Let it rest for 20 minutes before slicing. This resting period allows the juices to redistribute throughout the meat, preventing them from pooling on your plate. While it rests, skim any excess fat from the cooking liquid in the pressure cooker.

Return the pressure cooker to the stove over medium heat. Whisk in the 0.25 cup all-purpose flour to create a roux, stirring constantly for 2 minutes until it thickens. Slowly ladle in the cooking liquid from the pressure cooker, whisking continuously to prevent lumps. The gravy should thicken to a velvety consistency.

Remove from heat and stir in the 0.5 cup cold unsalted butter, one cube at a time, whisking until fully incorporated. This butter finish creates an incredibly rich, silky texture. Season to taste with additional salt and pepper if needed. The gravy should coat the back of a spoon and cling beautifully to each slice of pork.

Slice the pork against the grain into ½-inch thick slices. Arrange on a platter and ladle the warm gravy generously over the top. Garnish with the crispy celery crowns and sprinkle with 0.25 cup chopped fresh parsley for a pop of color and freshness.

Here's the thing about this dish—it tastes even better the next day. The flavors meld and deepen as it rests. Serve with crusty bread to soak up that luxurious gravy or alongside roasted vegetables for a complete meal. Each bite delivers perfect texture contrast: tender pork, crispy celery crowns, and velvety gravy that ties it all together.

Perfect pairings for these flavors

Crusty Bread Pairings

Nothing complements this rich pork roast like a warm, crusty loaf to soak up that velvety gravy. I love using a baguette-style sourdough from Portland's Tasty n Alder bakery—their crusty exterior and airy interior are perfect.

For a heartier option, try a ciabatta roll from New Seasons Market, which can handle generous gravy ladles without falling apart. 🥖

Roasted Vegetable Sides

Roasted vegetables add color and freshness to balance the richness. Try caramelized Brussels sprouts with ½ tsp smoked paprika and 1 tbsp maple syrup, or honey-glazed carrots with thyme.