Directions

Raw pork tenderloin placed in a slow cooker

Onion soup sauce being poured over pork tenderloin

Cooked pork tenderloin resting on a cutting board

Sliced pork medallions coated in onion gravy
To lean even harder into the 1970s church cookbook vibe, you can swap the cream of mushroom soup for cream of celery or cream of chicken—whatever you have in the pantry. If you want more pronounced onion flavor and texture, add 1 thinly sliced yellow onion on the bottom of the slow cooker before adding the pork.
For a slightly richer sauce, stir in 2 to 3 tablespoons of sour cream at the very end (off the heat) for a creamier, stroganoff-style gravy. If you prefer a thicker gravy, whisk 1 tablespoon cornstarch with 2 tablespoons cold water, stir it into the hot sauce in the slow cooker, and cook on HIGH for 10 to 15 minutes until it thickens.

Served pork tenderloin with mashed potatoes and green beans
You can also make this with pork loin (not tenderloin) but you’ll need a longer cook time; check for doneness and tenderness after 5 to 6 hours on LOW.
Food safety tips: Always start with fully thawed pork; cooking from frozen in a slow cooker can keep the meat in the temperature danger zone (40°F to 140°F) for too long. Use a meat thermometer to confirm the pork has reached at least 145°F in the thickest part, then let it rest before slicing. Keep the lid on the slow cooker as much as possible; every time you open it, heat escapes and lengthens the cook time. Refrigerate leftovers within 2 hours of cooking in shallow containers, and use within 3 to 4 days, reheating to at least 165°F before serving.
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