Slow-Cooker Mushroom Garlic Butter Pork Shoulder

This slow-cooker pork shoulder is the kind of dinner that feels like a Sunday supper but comes together in minutes. A hefty roast, a packet of onion soup mix, a pile of mushrooms, and a few pats of garlic-herb butter go into the crock.

Hours later, the meat is fall-apart tender, the mushrooms are silky, and the juices have turned into a rich, savory gravy. Serve it over buttered noodles or just with a spoon—it's that good.

The beauty of this recipe is its simplicity. With just four ingredients and a slow cooker, you can produce a pork shoulder that tastes like it simmered all day in a French bistro.

The onion soup mix provides deep umami and salt, the mushrooms soak up the meaty juices, and the cowboy butter melts into a luscious sauce. It's a set-it-and-forget-it meal that makes any weeknight feel special.

Ingredients

Why this recipe works

The slow cooker does all the work, turning a tough, well-marbled cut like pork shoulder into buttery-soft shreds. Low, gentle heat breaks down the collagen and connective tissue, releasing gelatin that enriches the cooking liquid. The result is meat that is moist, tender, and full of flavor—no searing or browning needed.

The combination of dry onion soup mix and garlic-herb butter creates a concentrated, savory base that clings to every bite.

As the butter melts, it carries the herbs and garlic into the meat and mushrooms, while the soup mix forms a crust that seasons the pork from the outside in. The mushrooms act like little sponges, soaking up all the delicious juices.

Notes and substitutions

Choose a boneless pork shoulder (often labeled Boston butt) for even cooking and easy shredding. The fat cap can stay on—it will baste the meat and keep it moist.

If your roast is tied, remove the twine before cooking. For the mushrooms, cremini (baby bellas) are ideal because they hold their shape and have a meaty texture, but white button mushrooms work too.

Cowboy butter is a compound butter made with garlic, herbs, and sometimes a pinch of chili flakes. You can buy it premade or stir together softened butter with minced garlic, parsley, thyme, and a little black pepper. If you don't have compound butter, use regular butter and add a few extra garlic cloves to the pot.

• Cremini mushrooms: White button mushrooms or baby bellas work just as well. Slice if halved are too chunky.
• Dry onion soup mix: Use 2 tablespoons of onion powder plus 1 teaspoon of dried minced onion and a pinch of salt, or a homemade onion soup mix.
• Garlic-herb compound butter: Use 4 tablespoons of softened butter mixed with 2 minced garlic cloves, 1 teaspoon dried parsley, and 1/2 teaspoon dried thyme.
• Boneless pork shoulder: A bone-in pork shoulder works too; just add 30 minutes to the cook time and remove the bone before shredding.

Equipment

• 6-quart slow cooker
• Cutting board
• Chef's knife
• Serving spoon
• Tongs or forks for shredding
• Measuring spoon
• Serving plates
• Large pot for noodles