Craving a cozy, restaurant-style dinner without standing over the stove? This slow cooker recipe turns a single pork tenderloin into a silky, garlicky, mushroom-tossed masterpiece.
It’s hands-off cooking that still gets you brag-worthy flavor. But here’s the catch!
A quick sear first makes all the difference — yes, you do have to leave the couch for two minutes.
Contents
Equipment: Must-haves
- Slow cooker
- Sharp knife
- Cutting board
- Measuring spoons
- Measuring cup
- Wooden spoon
- Tongs
- Bowl

Equipment: Nice-to-haves
- Skillet (for searing and reducing sauce)
- Meat thermometer (to hit perfect doneness)
- Whisk (for the sauce)

Ingredients
- 1 pork tenderloin (about 1 to 1½ lb), trimmed
- 1 tablespoon olive oil
- 1 tablespoon butter
- 1 cup sliced mushroom (cremini or button)
- 1 small onion, thinly sliced
- 3 cloves garlic, minced
- 1/2 cup chicken broth (low-sodium)
- 1/2 cup heavy cream
- 2 tablespoons Dijon mustard
- 1 teaspoon dried thyme
- 1/2 teaspoon smoked paprika
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1 teaspoon cornstarch
- 1 tablespoon cold water
- 1 tablespoon fresh parsley, chopped (optional, for garnish)
- Lemon wedge (optional, for serving)

Instructions
- Pat the pork tenderloin dry and season it evenly with salt, pepper, and smoked paprika.
- Heat a skillet over medium-high heat and add olive oil and butter until shimmering.
- Use tongs to sear the pork on all sides until golden brown, then transfer the pork to the slow cooker.
- Reduce the heat under the skillet to medium and add the sliced mushroom and sliced onion to the skillet.
- Sauté the mushroom and onion until the mushroom edges brown and the onion softens, then add the minced garlic and cook briefly until fragrant.
- Scrape the mushroom-onion-garlic mixture into the slow cooker, spreading it around the pork.
- In a bowl, whisk together the chicken broth, heavy cream, Dijon mustard, dried thyme, and a pinch of salt and pepper.
- Pour the cream mixture over the pork and mushrooms in the slow cooker, making sure the pork is mostly coated.
- Cover and cook on low until the pork reaches a safe internal temperature and is tender, or cook on high for a shorter time if you must hustle.
- Check doneness with a meat thermometer and aim for the safe temperature for pork; when done, transfer the pork to a plate and let it rest.
- Pour the cooking liquid into the skillet and bring it to a gentle simmer to concentrate the flavors.
- Mix the cornstarch with cold water to make a slurry and whisk it into the simmering sauce to thicken, if desired.
- Taste the sauce and adjust seasoning with salt, pepper, or a squeeze of lemon to brighten it.
- Slice the pork tenderloin and spoon the mushroom-garlic-cream sauce over the top.
- Garnish with chopped parsley and serve immediately with a lemon wedge on the side if you like a hint of brightness.
What Else You Should Know
Tip: Searing the pork tenderloin first adds a savory crust and deeper flavor. It’s short work and worth every second.
Tip: The slow cooker will make the sauce thinner than a pan sauce. Reducing it in a skillet concentrates flavor and gives you a luscious finish.
Use the cornstarch slurry if you prefer a thicker sauce. Variation: Swap dried thyme for fresh if you have it, but start with less fresh herb because it’s stronger.
You can also trade heavy cream for half-and-half for a lighter finish. Serving suggestion: Pair with mashed potato, buttered noodle, or a simple grain to soak up that garlic-cream sauce.
A green vegetable on the side adds color and a welcome crunch. Make-ahead: Cook the pork and store the sauce separately.
Reheat gently, slice the pork, and pour warm sauce over before serving. Safety note: Resting the pork after cooking lets the juices settle.
Use a meat thermometer to take the guesswork out of doneness. Final joke: If anyone asks how long it took, just say “an hour” and accept the applause — everyone believes slow-cooker magic.