Slow Cooker Pork Tenderloin

Section: Satisfying Main Dishes for Every Occasion

This pork tenderloin is cooked to juicy perfection in a slow cooker layered with sliced onions and simmered in a savory gravy made from beef broth and butter. The pork is first seared to lock in flavors and then slow cooked until tender and flavorful. The result is a tender meat served with rich gravy that complements a variety of side dishes like mashed potatoes or roasted vegetables, perfect for an easy yet delicious meal with minimal prep time.

A chef in a kitchen preparing food.
Created by Olivia Olivia
Last modified on Tue, 25 Nov 2025 19:47:16 GMT
A plate of food with a pork tenderloin and onions. Save
A plate of food with a pork tenderloin and onions. | cuisineandlife.com

This Slow Cooker Pork Tenderloin is perfect for busy weeknights when you want a comforting meal with minimal effort. It yields tender, juicy pork cooked in a rich onion gravy that’s anything but dry or bland. Just prep the ingredients, set it in the slow cooker, and come back to a delicious dinner that feels like it took much more work than it did.

I made this on a hectic weekday after work and was thrilled how juicy the pork came out It’s definitely become a go to meal that I can rely on even when I have little time

Ingredients

  • Onion: forms the flavorful base for the pork and the gravy Use sweet onions for a milder taste or yellow onions for more bite
  • Pork tenderloins: the main protein, naturally lean but when cooked slowly become tender and juicy Check for firm, pinkish meat without excessive moisture
  • Low sodium beef broth: provides moisture for cooking and adds richness to the gravy Use low sodium to balance the seasoning since other ingredients add salt
  • Packet of pork gravy mix: thickens and flavors the cooking juices If unavailable, beef gravy or au jus packets can be substitutes
  • Salted butter: adds richness and helps develop the gravy’s silky texture Opt for real butter, not margarine, for best flavor and mouthfeel
  • Olive oil: used for searing the pork which locks in juices and gives color

Instructions

Sear the pork:
Make sure your skillet is hot on medium high heat before adding a drizzle of olive oil Place the tenderloin in and sear each side until it develops a rich brown crust This step creates flavor depth and will help keep the meat juicy
Prepare the slow cooker:
Spray the inside of a 6 or 8 quart slow cooker with cooking spray Layer sliced onions evenly on the bottom They serve as a bed for the pork and infuse the gravy with sweetness
Place pork on onions:
Transfer the browned pork tenderloins on top of the onions in the slow cooker Pour the beef broth evenly around the meat This will help keep the pork moist during cooking and make a delicious base for the gravy
Add seasonings:
Sprinkle the pork gravy mix over the tenderloins then place slices of salted butter evenly on top This adds a creamy dimension and helps thicken the juices as it cooks
Cook low and slow:
Cover the slow cooker and cook on low for about 2 to 2 ½ hours until the pork’s internal temperature reaches at least 145 degrees Fahrenheit and the onions are soft
Serve:
Slice the pork into medallions and pour the flavorful gravy over the top Serve immediately for the best texture
A slow cooker pork tenderloin.
A slow cooker pork tenderloin. | cuisineandlife.com

Because the pork cooks low and slow in broth, it stays juicy and tender This recipe was a game changer for me when I wanted an easy recipe for pork that delivers big flavor without fuss The buttery gravy with caramelized onions always gets compliments and takes me back to cozy family dinners

Storage Tips

Once cooled, place leftovers in airtight containers Refrigerate for up to three days or freeze for up to three months To reheat, slice and warm with some gravy in a saucepan or slow cooker to keep the pork moist

Ingredient Substitutions

If you do not have pork gravy mix try beef gravy or au jus packets Butter may be swapped for ghee or olive oil for a dairy free option Using vegetable broth instead of beef broth can work but will slightly alter the flavor

Serving Suggestions

Serve this pork tenderloin with creamy mashed potatoes or buttered noodles Any roasted or steamed vegetable pairs nicely Fried apples are an especially tasty classic side that complements the pork

Slow cooker pork tenderloin with broccoli.
Slow cooker pork tenderloin with broccoli. | cuisineandlife.com

This easy slow cooker pork tenderloin delivers big flavor with very little fuss. It’s a reliable weeknight winner.

Common Questions About Recipes

→ What is the ideal cooking time for pork tenderloin in a slow cooker?

Cooking on low for about 2 to 2.5 hours ensures juicy, tender pork without drying it out. High setting cooks faster but can sacrifice tenderness.

→ Can I use liquid other than beef broth?

Beef broth adds flavor and moisture essential for the tenderloin to stay juicy while cooking low and slow. Avoid cooking without liquid.

→ Should the onions be cooked before adding to the slow cooker?

Onions can be sautéed beforehand to deepen their flavor, but they also cook well directly in the slow cooker, imparting sweetness to the dish.

→ How do I thicken the gravy from the slow cooker?

Mix equal parts cornstarch and water to create a slurry, then whisk it into the cooking liquid heated on the stove or in the slow cooker on high until thickened.

→ What side dishes pair well with slow cooked pork tenderloin?

Mashed potatoes, roasted vegetables, green beans, fried apples, or a fresh salad complement this pork dish beautifully.

→ Can other pork cuts be used similarly?

Pork loin works as an alternative but may require adjusted cooking times; always check internal temperature to ensure doneness.

Slow Cooker Pork Tenderloin

Juicy pork tenderloin cooked slowly with onions in a rich, flavorful gravy for an effortless dinner.

Prep Time
15 minutes
Cooking Time
150 minutes
Total Time Required
165 minutes
Created by Olivia: Olivia

Recipe Category: Main Dishes

Skill Level: Perfect for Beginners

Style of Cuisine: American

Serves: 4 How Many Servings (Two pork tenderloins)

Dietary Preferences: Low-Carb

Ingredients Needed

→ Vegetables

01 1 medium onion, thinly sliced

→ Meat

02 2 pork tenderloins (approximately 1.5 lb total), patted dry

→ Liquids

03 1 cup low-sodium beef broth

→ Seasonings

04 1 packet pork gravy mix
05 1 teaspoon salt
06 ½ teaspoon black pepper

→ Fats

07 1 tablespoon olive oil
08 2 tablespoons salted butter, sliced

Step-by-Step Directions

Step 01

Spray a 6 to 8-quart slow cooker with cooking spray and layer the sliced onions evenly at the bottom.

Step 02

Pat pork tenderloins dry and season all sides with salt and black pepper.

Step 03

Heat olive oil in a large skillet over medium-high heat. Sear each tenderloin on all sides until evenly browned, about 2-3 minutes per side.

Step 04

Place seared tenderloins on top of the onion bed in the slow cooker. Pour beef broth around the meat, avoiding pouring directly over it.

Step 05

Sprinkle pork gravy mix evenly over the tenderloins. Distribute butter slices atop the pork.

Step 06

Cover and cook on low heat for 2 to 2½ hours or until the internal temperature reaches at least 145°F and onions are tender.

Step 07

Slice tenderloin and serve immediately, spooning the cooking juices over the slices as gravy.

Helpful Hints

  1. For thicker gravy, strain cooking juices into a saucepan. Whisk 2 tablespoons cornstarch with 2 tablespoons cold water and add to the pan. Heat over medium-high, whisking until thickened.
  2. Searing the pork before slow cooking seals in juices and enhances flavor.
  3. Monitor cooking times to avoid overcooking and drying out the pork.

Must-Have Equipment

  • Slow cooker (6 to 8-quart capacity)
  • Large skillet
  • Meat thermometer

Allergy Details

Check ingredient packaging for allergens, and consult a healthcare provider if you’re unsure.
  • Contains dairy (butter)
  • Contains gluten (gravy mix)

Nutritional Details (Per Serving)

These nutrition figures are for guidance only and don’t replace advice from a medical professional.
  • Calories Per Serving: 320
  • Fat Content: 18.5 grams
  • Carbohydrate Content: 6 grams
  • Protein Content: 35 grams