Slow Cooker Pork Roast: Fork-Tender Garlic Herb Recipe

This slow cooker pork roast starts with a boneless pork shoulder, a smoky garlic herb rub and a bed of onion wedges, then cooks low for about 8 hours until a fork twists right in. The juices in the pot become a quick pan sauce. Slice it for Sunday dinner or shred it for sandwiches the next day.

Why You'll Love This Slow Cooker Pork Roast

Pork shoulder is the forgiving cut. It's marbled all the way through and threaded with connective tissue, and 8 hours of gentle heat melts all of that into soft, juicy meat that pulls apart in long strands. An extra half hour won't hurt it. A lean roast is the opposite: it goes from done to dry fast.

The hands-on part takes about 15 minutes. Mix a rub, cut an onion, whisk three liquids together. Then the slow cooker takes over, and by afternoon the kitchen smells of smoked paprika and garlic.

And one roast feeds you twice. Serve it sliced on day one with the soft onions and sauce spooned over, then shred whatever is left for tacos or sandwiches.

Ingredients

Pork and rub

• 3 1/2 lb (1.6 kg) boneless pork shoulder (also sold as Boston butt), trimmed of excess surface fat
• 1 tbsp olive oil
• 2 tsp kosher salt (about 8 g)
• 1 tbsp smoked paprika
• 2 tsp garlic powder
• 1 tsp onion powder
• 1 tsp dried thyme
• 1 tsp black pepper
• 1 tbsp brown sugar

Slow cooker base

• 1 large yellow onion, cut into thick wedges
• 6 garlic cloves, smashed
• 3/4 cup (180 ml) low-sodium chicken broth
• 2 tbsp apple cider vinegar
• 1 tbsp Worcestershire sauce

Sauce and finish

• 2 tsp cornstarch mixed with 1 tbsp cold water (optional, to thicken the sauce)
• Chopped fresh parsley to finish

How to Make Pork Shoulder in the Slow Cooker

1. Pat the pork dry. Pat the pork shoulder dry with paper towels so the rub sticks. It must be fully thawed before it goes in.
2. Rub it all over. Mix the salt, smoked paprika, garlic powder, onion powder, thyme, black pepper and brown sugar. Rub the pork with the olive oil, then press the spice mix onto every side.
3. Sear it (optional). This step is optional. For deeper color, sear the pork in a hot skillet for about 3 minutes per side, until a dark crust forms and it releases from the pan on its own.
4. Build the base. Scatter the onion wedges and smashed garlic over the bottom of the slow cooker. They lift the roast off the floor of the pot and melt into the sauce.
5. Add the pork. Set the pork on top of the onions, fat side up, so the fat bastes the meat as it melts.
6. Pour in the liquid. Whisk the broth, apple cider vinegar and Worcestershire sauce together and pour it around the pork, not over it, so the rub stays put. It looks like too little liquid. It isn't.
7. Cook low and slow. Cover and cook on low for about 8 hours, or on high for about 5 hours. Keep the lid on the whole time.
8. Check that it is done. The pork is ready at 195 to 205°F (90 to 96°C) in the thickest part, when a fork pushed in twists easily. Pork is safe at 145°F (63°C) with a 3-minute rest, but shoulder needs the higher temperature to turn tender. If it resists, give it another 30 to 60 minutes.
9. Rest the roast. Lift the pork onto a cutting board and rest it for 15 minutes.
10. Make the sauce. Skim the fat from the juices in the pot. Pour the juices into a saucepan and simmer for 5 minutes. For a thicker sauce, stir in the cornstarch slurry and simmer 1 to 2 minutes more, until it coats a spoon.
11. Slice or shred and serve. Slice or shred the pork, spoon the sauce and onions over and finish with parsley. Don't leave cooked pork on warm for hours, and refrigerate leftovers within 2 hours.

Tips for Fork-Tender Pork

• Use pork shoulder, not a lean loin roast. Shoulder (pork butt) has the fat and connective tissue that melt into tenderness over long cooking. A loin roast has little of either and dries out on an 8-hour schedule, so it needs just 3 to 4 hours on low and a thermometer. For a lean cut done right, see our slow cooker pork tenderloin.
• Go easy on the liquid. The roast releases plenty of its own juice. Extra broth just thins the sauce.
• Keep the lid on. Each lift lets out heat the cooker takes a long while to win back, so every peek adds time.
• Never cook it from frozen. Thaw the roast in the fridge first, which takes a full day or more at this size.
• Trust a thermometer, not the clock. Slow cookers vary, and one brand's low can run as hot as another's high. Start checking at 7 hours.
• Know safe from tender. Pork is safe at 145°F (63°C) with a 3-minute rest, according to the FoodSafety.gov safe minimum internal temperature chart. But shoulder at 145°F is still chewy. It needs 195 to 205°F (90 to 96°C) before the collagen breaks down.
• Rest before slicing. Fifteen minutes lets the juices settle into the meat instead of flooding the board.
• Trim only the thick fat cap. Cut back anything thicker than 1/4 inch but leave a thin layer. It keeps the top moist and flavors the juices.

Easy Variations

Same pork, same layering, same times. Only the flavors change.

Apple and sage

Swap the thyme for 1 tsp dried sage and the broth for 3/4 cup (180 ml) unfiltered apple cider. Tuck 2 firm apples, cut into wedges, in with the onions. They soften into a sweet-tart sauce.

BBQ-style shredded pork for sandwiches

Leave out the thyme. Shred the cooked pork, drain most of the liquid, stir in 1 cup (240 ml) barbecue sauce and cook on high, lid off, for 30 minutes. Pile onto toasted buns with slaw.

Carrots and potatoes in the pot

Add 1 lb (450 g) carrots and 1 1/2 lb (680 g) small Yukon Gold potatoes at the start, around the pork. Cut them in large chunks, about 2 inches, so they don't turn to mush. Add an extra 1/2 tsp kosher salt.

What to Serve with It

Those onion-heavy juices need something soft to soak into. Buttery mashed potatoes are the classic pick, though egg noodles, creamy polenta or plain white rice all do the job.

Add something green with a bit of bite to cut the richness, like roasted green beans or an apple and cabbage slaw with a mustard dressing. Shredded leftovers go straight into soft rolls or warm tortillas with quick-pickled red onions.

Storage and Make-Ahead

Refrigerate leftovers within 2 hours of cooking, in an airtight container with some sauce spooned over. They keep for 3 to 4 days.

To freeze, pack sliced or shredded pork with a little sauce into freezer bags and freeze for up to 3 months. Thaw overnight in the fridge.

Reheat covered, in a 300°F (150°C) oven or a saucepan with a splash of broth, until it reaches 165°F (74°C) in the center.

To get ahead, rub the pork the night before and refrigerate it wrapped. If the roast finishes early, don't leave it on warm for hours. Refrigerate it and reheat at dinnertime.

Frequently Asked Questions

Can I cook a pork roast from frozen in the slow cooker?

No. A frozen roast warms too slowly and can sit for hours at temperatures where bacteria multiply. Thaw it fully in the fridge first. Pork is safe at 145°F (63°C) with a 3-minute rest, though shoulder is cooked to 195 to 205°F (90 to 96°C) for tenderness. Refrigerate leftovers within 2 hours and reheat to 165°F (74°C).

How long does pork roast take on low vs high?

About 8 hours on low or 5 hours on high for a 3 1/2 lb (1.6 kg) shoulder. Low gives a more even result. Either way, go by temperature, not the clock.

Is pork shoulder the same as pork butt?

Both come from the shoulder of the pig. Boston butt is the upper part of the shoulder, and stores sell it as pork shoulder, pork butt or Boston butt. Any of them works here.

Why is my roast tough?

It needs more time, not less. Shoulder goes through a chewy stage before its connective tissue breaks down. Put the lid back on and check again in 30 to 60 minutes.

Can I use a pork loin?

Yes, but it's lean, so 8 hours will dry it out. Cook it 3 to 4 hours on low, take it out at 145°F (63°C) and rest it 3 minutes. It slices neatly but won't shred.

How do I thicken the sauce?

Simmer the skimmed juices for 5 minutes, then stir in 2 tsp cornstarch mixed with 1 tbsp cold water. It thickens within a minute or two.

Fifteen minutes in the morning, and by dinner the whole roast gives way to a fork.