Some dinners feel familiar in the best possible way, the kind you know will be comforting before you even lift the lid. This slow cooker pork tenderloin is one of those recipes. It's simple, reliable, and rooted in old fashioned home cooking.

As it cooks, the pork turns tender and juicy in a buttery broth with warm spices that make the whole kitchen smell like supper is on its way. It’s an easy meal that lets time do the work, with flavors that feel classic and comforting.

It’s the kind of dish Grandma would have started earlier in the day, knowing it would be just right when everyone finally sat down to eat.

What You Need to Know

Pork tenderloin cooks gently and stays juicy when not overcooked
The butter melts into the broth, creating a rich, simple sauce
Checking the temperature early helps prevent drying out
Letting the pork rest before slicing keeps it tender

Ingredients Overview

Pork tenderloin: Lean, tender, and perfect for slow cooking when watched carefully
Beef broth: Adds savory depth to the cooking liquid
Brown sugar: Balances the spices with gentle sweetness
Butter: Melts into the sauce for richness
Seasonings: Paprika, garlic powder, onion powder, chili powder, Italian seasoning, salt, and red pepper flakes create a warm, classic flavor blend

How to Make Old Fashioned Slow Cooker Pork Tenderloin

Step 1: In a small bowl, combine the brown sugar, smoked paprika, garlic powder, onion powder, chili powder, Italian seasoning, salt, and red pepper flakes. Stir well to mix the seasoning.

Step 2: Place the pork tenderloins on a cutting board and sprinkle the seasoning evenly over all sides, gently patting it into the meat.

Step 3: Transfer the seasoned pork tenderloins to the crock pot. Pour in the beef broth, then slice the butter into pats and place them over the top of the pork.

Step 4: Cover and cook on Low for 6 to 7 hours or on High for 3 to 4 hours. Begin checking the internal temperature after about 1½ hours. The pork should reach 145 to 150 degrees.

Step 5: Once cooked, remove the pork from the slow cooker and let it rest for about 30 minutes. Slice, then return the pork to the broth in the crock pot before serving.

Grandma’s Tips

Pork tenderloin cooks faster than larger cuts, so keep an eye on the temperature
Resting the meat before slicing keeps the juices right where they belong

Modern Updates

Add a splash of cream at the end for a richer sauce
Serve the sliced pork over mashed potatoes or buttered noodles

More Slow Cooker Recipes

FAQs

What temperature should pork tenderloin be cooked to?

Pork tenderloin should reach an internal temperature of 145 to 150 degrees, then rest before slicing.

Why let pork tenderloin rest before slicing?

Resting allows the juices to redistribute, keeping the meat tender and moist.

How long does leftover pork tenderloin last?

Stored in an airtight container, leftovers will keep in the refrigerator for up to 3 days.

Old Fashioned Slow Cooker Pork Tenderloin

This slow cooker pork tenderloin is tender, juicy, and full of old fashioned comfort. Cooked low and slow in a buttery broth with warm spices, it’s a simple, cozy dinner that tastes like it came straight from grandma’s kitchen.

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Prep Time 10

Cook Time 8

Total Time 8 10

Servings: 6

Course: Main Course

Cuisine: American

Ingredients Method Notes

Ingredients

2 pork tenderloins (about 1 lb. each)
½ cup beef broth
2 tablespoons brown sugar
1 teaspoon smoked paprika
1 teaspoon garlic powder
1 teaspoon onion powder
1 teaspoon chili powder
1 teaspoon Italian seasoning
1 teaspoon salt
1 teaspoon Pinch red pepper flakes
¼ cup butter

Method

In a small bowl, combine the brown sugar, smoked paprika, garlic powder, onion powder, chili powder, Italian seasoning, salt, and red pepper flakes. Stir well so the seasoning is evenly mixed.
Place the pork tenderloins on a cutting board. Sprinkle the seasoning mixture evenly over all sides of the pork, gently pressing it in so it adheres well.
Transfer the seasoned pork tenderloins to the crock pot, laying them flat. Pour the beef broth around the pork, then slice the butter into small pats and place them over the top.
Cover and cook on Low for 6 to 7 hours or on High for 3 to 4 hours. Begin checking the internal temperature after about 1½ hours. The pork is done when it reaches 145 to 150 degrees.
Once cooked, carefully remove the pork tenderloins from the slow cooker and let them rest on a cutting board for about 30 minutes. This helps keep the meat juicy.
Slice the pork into thick slices, then return it to the crock pot so it can soak up some of the buttery broth before serving.

Notes

Begin checking the internal temperature early so the pork does not overcook
Pork tenderloin is done at 145 to 150 degrees and should rest before slicing
Letting the meat rest helps keep it juicy and tender
Serve with mashed potatoes, buttered noodles, or simple vegetables

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