Slow Cooker Pork Loin Roast

By
Diana Rattray
Diana Rattray
Diana Rattray
Southern-cuisine expert and cookbook author Diana Rattray has created more than 5,000 recipes and articles in her 20 years as a food writer.
Learn about The Spruce Eats' Editorial Process
Updated on 03/5/24
Crock pot pork loin roast

The Spruce

Prep: 20 mins
Cook: 6 hrs
Total: 6 hrs 20 mins
Servings: 6 servings

This delicious pork loin roast starts with a simple herb and spice rub and is then slow-cooked to perfection with a tangy sauce mixture. The sauce is thickened and served with the pork. Add mashed or boiled potatoes for a fabulous meal. It's also perfect alongside rice or noodles.

The pork roast is done after about 3 hours on high or about 6 to 8 hours on low. To avoid overcooking the pork, check the temperature with an instant-read thermometer. If overcooked, the pork can become dry and could be difficult to slice. Additionally, you can skip the searing step, but the caramelization adds an excellent flavor.

What You'll Need to Make This Pork Loin Roast Recipe
A Great Skillet
A Nifty Slow Cooker
A Handy Dandy Fat Separator

Ingredients

  • 1 boneless pork loin roast, about 3 pounds

  • 1 teaspoon garlic powder

  • 1 teaspoon dried thyme

  • 1 teaspoon paprika

  • 1/2 teaspoon freshly ground black pepper

  • 1/2 teaspoon kosher salt

  • 2 tablespoons olive oil

  • 1 1/2 cups chicken stock, low sodium or salt free

  • 1/2 lemon, juiced, about 1 1/2 tablespoons

  • 1 tablespoon soy sauce

  • 1 teaspoon Worcestershire sauce

  • 2 tablespoons cornstarch

  • 1 tablespoon cold water

Steps to Make It

  1. Gather the ingredients.

    Crock pot pork loin roast ingredients
    The Spruce

  2. Pat the pork loin with a paper towel to remove excess moisture. If desired, cut away any excess fat. You can also leave it on and then pour the liquids into a gravy separator to remove excess fat.

    Pat or cut excess fat and moisture from pork loin
    The Spruce

  3. In a small bowl combine the garlic powder, thyme, paprika, freshly ground black pepper, and kosher salt.

    Combine the garlic powder, thyme, paprika, freshly ground black pepper, and kosher salt
     The Spruce

  4. Rub the pork all over with the mixture.

    Rub pork with seasoning mixture
    The Spruce

  5. Heat the olive oil in a large skillet and sear the pork on all sides. 

    Sear pork in a skillet
    The Spruce

  6. Place the pork in a slow cooker.

    Place pork in slow cooker
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  7. In a 2-cup measuring cup, combine the chicken stock, lemon juice, soy sauce, and Worcestershire sauce; blend well.

    Combine the chicken stock, lemon juice, soy sauce, and Worcestershire sauce
     The Spruce

  8. Pour the liquids into the crock pot with the roast.

    Pour liquids over pork in slow cooker
    The Spruce

  9. Cover and cook on low for 6 to 8 hours or on high for about 3 hours. Check the roast at the lower time for doneness to avoid overcooking. An instant-read thermometer should register at least 145 F (63 C).

  10. Remove the roast to a platter, tent with foil, and keep warm.

    Cover pork with foil
    The Spruce

  11. Pour the liquids into a gravy separator, then into a medium saucepan. Bring to a boil. Taste and adjust the seasonings. If the liquids are very watery from the long cooking time, boil for a few minutes to reduce and concentrate the flavors. 

    Cook liquids and add seasonings to make gravy
    The Spruce

  12. Put the cornstarch in a small cup or bowl and whisk with the cold water. Whisk the cornstarch mixture into the simmering liquids and continue cooking, stirring, until the sauce is thickened.

    Whisk cornstarch mixture and liquids for pork loins
    The Spruce

  13. Slice the pork and serve it with the hot thickened sauce. Enjoy.

    Crock pot pork loin with mashed potatoes and gravy
    The Spruce

Tip

  • The USDA recommends a minimum safe temperature of 145 F for pork. Check it with a reliable instant-read thermometer to ensure it is completely cooked.

Recipe Variation

  • Slice a large onion and add it to the slow cooker before you add the pork. Or add it to the skillet as you sear the pork and transfer to the slow cooker along with the roast.

Can you overcook pork loin roast in a crock pot?

It is best to cook this lean cut of meat on low and slow rather than on high. The high setting can cook it too fast and tends to boil it. Pork loin roast can be overcooked and will become dried out, even in the crock pot.

Nutrition Facts (per serving)
499 Calories
25g Fat
5g Carbs
61g Protein
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Nutrition Facts
Servings: 6
Amount per serving
Calories 499
% Daily Value*
Total Fat 25g 32%
Saturated Fat 7g 35%
Cholesterol 181mg 60%
Sodium 504mg 22%
Total Carbohydrate 5g 2%
Dietary Fiber 1g 2%
Total Sugars 1g
Protein 61g
Vitamin C 7mg 36%
Calcium 31mg 2%
Iron 2mg 12%
Potassium 898mg 19%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)