Tulo

Slow Cooker Pork Tenderloin Recipe

Sliced pork tenderloin fanned on a white platter and drizzled with a glossy brown gravy, with a sprig of parsley on top.
Photo by Luca Luperto on Pexels

Pork tenderloin is lean and cooks fast, so it's easy to dry out or turn mushy in a slow cooker if you're not watching the clock. Searing it first locks in a browned crust, a short low-heat cook time keeps the meat from falling apart, and the leftover cooking liquid becomes a thickened gravy instead of getting poured down the drain.

Prep
15 min
Cook
3 hr
Total
3 hr 15 min
Servings
4

Ingredients

Servings4
  • 1 1/2 lb pork tenderloin
  • 1 tbsp olive oil
  • 4 cloves garlic, minced
  • 3 tbsp brown sugar
  • 2 tbsp dijon mustard
  • 2 tbsp soy sauce
  • 1/2 cup low-sodium chicken broth
  • 1 tsp dried thyme
  • 1 tsp salt
  • 1/2 tsp black pepper
  • 1 tbsp cornstarch
  • 1 tbsp water, for slurry
  • 2 tbsp fresh parsley, chopped

Nutrition per serving

Calories
282
Protein
36g
Carbs
14g
Fat
10g

Based on the recipe as written, one serving. Recalculates if you swap an ingredient above. An estimate only, exact values depend on the specific ingredients used.

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Instructions

  1. 1Pat the pork tenderloin dry with paper towels, then trim off the thin silverskin membrane if it's still attached. Season all over with salt, pepper, paprika, and thyme.
  2. 2Heat the olive oil in a skillet over medium-high heat. Sear the tenderloin for 2 to 3 minutes per side, turning until all sides are browned. This is optional but builds flavor the slow cooker can't replicate on its own.
  3. 3In a small bowl, whisk together the minced garlic, brown sugar, dijon mustard, soy sauce, and chicken broth.
  4. 4Place the seared tenderloin in the slow cooker and pour the sauce mixture over it.
  5. 5Cover and cook on low for 2.5 to 3 hours, or on high for 1.5 to 2 hours, until an instant-read thermometer inserted into the thickest part reads 145°F (63°C).USDA safe minimum for poultry: 165°F (74°C)
  6. 6Transfer the pork to a cutting board, tent loosely with foil, and let it rest for 5 to 10 minutes before slicing.
  7. 7Meanwhile, whisk the cornstarch into the water until smooth, then stir it into the cooking liquid left in the slow cooker. Cover and cook on high for 5 to 10 minutes, stirring once, until slightly thickened.
  8. 8Slice the pork against the grain, spoon the thickened sauce over the top, and sprinkle with chopped parsley before serving.
How to Cook Pork Tenderloin

Tips & variations

  • Two smaller tenderloins (about 3/4 lb each) work better than one large one; they cook more evenly and fit flatter in the slow cooker.
  • Swap the dijon for whole grain mustard for a sharper, coarser sauce, or add a tablespoon of apple cider vinegar for extra tang.
  • For a fall-apart texture more like pulled pork, use a pork shoulder or butt instead, but plan for 6 to 8 hours on low since that cut is tougher and needs longer to break down.
  • Add sliced apples or a halved onion to the slow cooker along with the pork for a slightly sweeter, more aromatic sauce.

Storage & reheating

Store sliced pork and gravy together in an airtight container in the refrigerator for up to 4 days. Reheat gently in a covered skillet over low heat with a splash of broth to keep the meat from drying out, or in the microwave at 50% power in short bursts. Freeze slices in the sauce for up to 2 months; thaw overnight in the fridge before reheating.

Tips from the Tulo kitchen

  • Buy pork tenderloin, not pork loin. Loin is a wider, tougher roast that needs a much longer cook time; tenderloin is the narrow cut that cooks quickly.
  • If the tenderloin is curled or uneven in thickness, tuck the thin end under itself and secure with a toothpick so it cooks at roughly the same rate as the thicker end.

FAQ

Can I skip searing the pork before it goes in the slow cooker?

Yes, the pork will still cook through safely, but skipping the sear means the meat stays pale gray instead of browned and the finished dish loses some depth of flavor. If short on time, it's the step to cut.

Why did my slow cooker pork tenderloin turn out dry or stringy?

It was almost certainly left in too long. Tenderloin is very lean, and once it climbs much past 145 to 150°F internal, the muscle fibers tighten and squeeze out moisture. Start checking temperature at the 2.5-hour mark on low.

Can I use pork loin instead of pork tenderloin in this recipe?

Not with the same timing. Pork loin is a larger, wider roast that needs closer to 4 to 5 hours on low to cook through, while tenderloin is done in 2.5 to 3 hours. Using the tenderloin timing on a loin will leave it undercooked.

Do I need to add liquid to the slow cooker besides the sauce?

No. The broth, soy sauce, and mustard mixture along with juices released from the pork provide enough liquid; adding more will just dilute the flavor and make the finishing gravy harder to thicken.

Can I make the gravy without cornstarch?

Yes. Simmer the strained cooking liquid in a small saucepan over medium heat for 5 to 8 minutes to reduce and thicken it naturally, or whisk in a tablespoon of softened butter mixed with flour instead of the cornstarch slurry.

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