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This 4-ingredient Slow cooker pork loin is tender, savory, and perfect when turning on the oven is not an option. Add the roast, onion soup mix, chicken broth, and barbecue sauce, then let the Slow Cooker do the work. The juicy pork is delicious with mashed potatoes, egg noodles, rice, green beans, or plenty of bread for soaking up the sauce.
Why You’ll Love It
- No browning or chopping — add everything to the Slow Cooker and let it cook for 6 to 8 hours.
- Cozy savory-sweet flavor — onion soup mix and barbecue sauce make rich, spoonable juices.
- Feeds a crowd — a 3- to 4-pound pork loin stretches easily with a couple of simple sides.
- Great leftovers — slice it for sandwiches, warm it with extra sauce, or pile it onto soft buns with coleslaw.
Ingredient Notes
A center-cut pork loin roast is what you want here, not pork shoulder. They are not interchangeable. Pork loin is leaner, so it cooks beautifully in the Slow Cooker but can dry out if you leave it too long. If your slow cooker runs hot—and some of them do, for reasons known only to the appliance gods—start checking around the six-hour mark.
For the dry onion soup mix, use the standard one-ounce packet. I usually buy Lipton because it is in every grocery store from here to kingdom come. There may be a better artisanal onion soup mix somewhere, but this is simple pork, not the Olympics.
Use chicken broth, not water. That one cup makes the cooking liquid richer and gives you enough to spoon over the sliced meat later. As for barbecue sauce, pick one you already like. A honey-style sauce gives the pork a sweeter finish, which is very nice alongside corn on the cob or baked beans. A tangier sauce works well too.
Ingredients
- 1 center-cut pork loin roast, about 3 to 4 pounds
- 1 packet dry onion soup mix, about 1 ounce—the regular little envelope
- 1 cup chicken broth
- 1 cup barbecue sauce, whatever kind you will happily eat
Instructions
Place the raw center-cut pork loin roast in the bottom of your slow cooker. I don’t add oil or do anything fancy beforehand; just unwrap it, set it in there, and wash your hands well. This is the sort of recipe that respects limited patience on a busy night.
Sprinkle the dry onion soup mix evenly over the top of the pork. Some of it will slide down the sides, and that is perfectly fine. I used to try to pat every speck into place, as if the roast were going to be judged at the county fair. It will not be.
Pour the chicken broth around the roast, rather than right over the onion soup mix, then spoon the barbecue sauce over the top. The broth keeps things moist while the sauce stays mostly on the meat at first, and it all mingles together as it cooks. It looks a little underwhelming at this point. Don’t worry—it gets there.
Cover the slow cooker and cook on low for 6 to 8 hours, until the pork is tender and reaches a safe internal temperature. Since pork loin is lean, begin checking near the 6-hour mark if your cooker tends to run hot. With lean pork, don’t completely forget it. Set a reminder on your phone.
Transfer the cooked pork to a cutting board and let it rest for 10 minutes before slicing. This little pause matters. It gives the juices time to settle instead of running all over the board—which they may do anyway, because kitchens are chaos. Slice the pork and serve it with the cooking juices spooned over the top. If you want, fish out some of the thicker oniony bits with a spoon and pile those on too.
Variations
For a sweeter pork dinner, use a honey-style barbecue sauce. It is especially good with corn on the cob and baked beans.
For thicker, gravy-style juices, pour the liquid from the slow cooker into a saucepan once the pork is done and simmer it for a few minutes. If you want it smoother and thicker still, a small cornstarch slurry will do the trick. It does make a pretty sauce.
Storage & Reheating
Keep leftover pork, along with some of its juices, in a covered container in the refrigerator. The juices are important—they help keep those lean slices from drying out when you reheat them. Store the meat sliced for easier lunches.
Warm slices gently with a little of the cooking liquid, either in a covered skillet or in the microwave. Don’t blast it until it turns tough; pork loin will punish you for that. Low and slow is better, even when reheating.
The best leftover use is sandwiches. Soft buns, warm pork, extra sauce, and a scoop of coleslaw if you have it.
Final Notes
There are recipes that quietly become part of the machinery of family life. This is one of those. It’s the dinner to reach for when the afternoon gets away, the weather is still sticky, or there is a busy evening ahead.
That’s the funny thing about a plain supper. It doesn’t ask much. It just sits there, warm and dependable, with juices for the potatoes and enough left over for another meal.
4-Ingredient Slow Cooker Late August Lifesaver
Ingredients
- 1 center-cut pork loin roast about 3 to 4 pounds
- 1 packet dry onion soup mix about 1 ounce; use a regular packet
- 1 cup chicken broth
- 1 cup barbecue sauce use your preferred variety
Instructions
- Place the raw center-cut pork loin roast in the bottom of the slow cooker.
- Sprinkle the dry onion soup mix evenly over the top of the pork.
- Pour the chicken broth around the roast, then spoon the barbecue sauce over the top.
- Cover the slow cooker and cook on low for 6 to 8 hours, until the pork is tender and reaches a safe internal temperature.
- Begin checking near the 6-hour mark if your slow cooker tends to run hot, because lean pork loin can dry out if overcooked.
- Transfer the cooked pork to a cutting board and let it rest for 10 minutes before slicing.
- Slice the pork and serve it with the cooking juices spooned over the top.