Pork Loin Roast

Annie Lampella @ Ketofocus

By Annie Lampella, Pharm.D.

Published June 8, 2021 • Updated February 3, 2026

This post may contain affiliate links. See my disclosure policy.

This juicy low-carb pork roast is my go-to when I need a simple, impressive main for family dinners. It's hearty enough to satisfy everyone and pairs well with just about any side dish.

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Pork Loin Roast

5 (5) Prep 10m Cook 60m Total 70m 6 servings

Ingredients

  • 3 pound pork loin roast
  • 2 teaspoons salt
  • 2 teaspoons garlic powder
  • 1 teaspoon paprika
  • 1 teaspoon ground mustard
  • 1/2 teaspoon pepper

Step by Step Instructions

Step by Step Instructions

1
Preheat oven

Preheat the oven to 375 degrees. Allow pork loin to be at room temperature while the oven is preheating.

red 375 degree on a black background
2
Mix seasonings

In a small bowl, mix together salt, garlic powder, paprika, ground mustard and pepper.

a small bowl with dry rub seasoning next to a small whisk
3
Dry rub down

Pat the pork loin dry with a paper towel. Massage dry rub all around pork loin roast.

raw pork in a mixing bowl with dry rub on it
4
Roast it

Add pork loin to a baking dish with the fat cap facing up. Bake at 375 degrees until it reaches a temperature of 140 F degrees, 60 minutes. Remove from the oven and allow to rest for 15 minutes before slicing. Slice the roasted pork loin crossways into ¾ to 1 inch slices and serve with a drizzle of the pan drippings or make a gravy.

an uncooked pork loin in a baking casserole dish
Nutrition Per Serving
286 Calories
22.2g Fat
46.3g Protein
0.7g Net Carbs
1g Total Carbs
6 Servings
Nutrition disclaimer

The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.

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Keto Pork Loin Recipe

three slices of roast in front of the whole roast

This easy, juicy pork loin roast is packed with flavor and tastes incredible with just about any side dish. I love serving it with air-fryer brussels sprouts and green beans topped with crispy bacon. Pork loin roasts are perfect for family-style gatherings, potlucks, and holiday dinners.

I season this tender pork loin with paprika, garlic powder, and ground mustard for a perfectly balanced flavor. This hearty roast makes a great Sunday dinner to share with your family. It’s a crowd-pleaser because it’s tasty and filling. Save your leftovers to enjoy this low-carb pork loin later in the week. It keeps in the refrigerator for up to five days and two months in the freezer.

What is a Pork Loin Roast?

This savory cut is considered a roast because of its large size. Pork loin roasts are sold with or without the bone. A boneless pork loin cooks faster, but the bone adds more flavor. It’s typically a tender and lean cut that leaves you satisfied. If you need more fat with your meal, serve with a pat of butter on top or a side of creamy mashed cauliflower.

juicy slices of pork on a platter with greens

How to Cook a Pork Loin?

Cooking pork loin might seem complex, but this recipe is simple. First, allow the pork roast plenty of time to defrost in the refrigerator. I toss it in the fridge the night before for the best results. I also let the roast sit at room temperature for about 30 minutes before roasting. Once it’s ready, mix your seasoning and massage it into the pork loin evenly. This creates a savory and flavorful crust.

After your pork loin is seasoned, place it in your preheated oven for an hour. Then, take it out and let the roast rest for fifteen minutes before slicing for the best taste. Drizzle the remaining drippings from the pan on top of your sliced roast for extra moisture and flavor.

Pork Loin Roast vs Pork Tenderloin

While both cuts are delicious and located towards the back of the animal, there are several differences. Tenderloins are smaller and narrower and come from the animal’s backbone muscles. Because of this, pork tenderloins are quick and easy to make on the grill or in a frying pan at high heat. Pork loin roasts, on the other hand, are best when slow-cooked to bring out their full flavor.

If you’re looking for a pork tenderloin recipe, my marinated pork tenderloin hits the spot. I make it in the slow cooker for easy cooking.

What Internal Temperature Should Pork Loin Reach?

The optimal internal temperature for pork loin roasts is 145 degrees Fahrenheit. If the pork roast is overcooked, it becomes too dry or tough to eat. Allow at least five to ten minutes of rest time for the best quality and flavor.

a whole pork roast on a white platter with slices of roast on the plate too and a fork

Tips for Making a Juicy Pork Loin

Pork loin roasts are much larger than tenderloins, so the cooking process takes a bit longer. To cook pork loin safely, the standard rule of thumb is roughly twenty-five minutes per pound of the loin, assuming the roast is about three to four pounds.

How Long to Cook Per Pound

Pork loin roasts are much larger than tenderloins, so the cooking process takes a bit longer. To cook pork loin safely, the standard rule of thumb is roughly twenty-five minutes per pound of the loin, assuming the roast is about three to four pounds.

Pork Loin Roast

Frequently Asked Questions

Can I use a different cut of pork for this roast?

Yes! While a pork loin roast is ideal for its tenderness, you can substitute pork shoulder or tenderloin. Just watch your cooking times since they'll be different.

What side dishes go well with pork loin roast?

This roast pairs well with roasted vegetables, cauliflower mash, or a fresh salad. Mix and match based on what your family likes.

How do I store leftovers from the pork loin roast?

Once cooled, store leftovers in an airtight container in the fridge for up to 3-4 days. You can also freeze them for up to 3 months.

Can I make this recipe ahead of time?

Yes! You can season the pork loin roast a day in advance and let it marinate in the fridge overnight for extra flavor. Just make sure to bring it to room temperature before cooking.

Is this recipe suitable for a low-sodium diet?

Yes, adjust the salt in this recipe. Use a salt substitute or reduce the amount of salt to suit your needs.

About the Author
Annie Lampella, Pharm.D.

Annie Lampella, Pharm.D.

Annie is a Doctor of Pharmacy, mom, and the recipe creator behind KetoFocus. With a B.S. in Genetics from UC Davis, she has over 14 years of experience developing family-friendly keto recipes based on the science of human metabolism.

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  1. M
    Mimi Dec 1, 2024

    Just tried this. It was easy and delicious!

  2. T
    Tara Mar 2, 2024

    The nutritional information does not add up. All the grams of fat, protein, and carbs should add up to the calories, but they do not. 9 calories per gram of fat, 4 calories per gram of protein, and 4 calories per gram of carbs. The recipe is delicious though!

  3. L
    Lisa Mar 27, 2023

    This was so simple & absolutely delicious!!

  4. L
    Leslie Holland Apr 15, 2022

    I buy a 9 lb. Pork loin at Sam's Club monthly, and have them cut it and wrap it in 1/3's. Then I make this about 3x a month. It makes about 5 servings each. I live by myself and am always so excited for leftovers! It is great for lunches or dinners with just about any veggie you can imagine. It freezes beautifully, and works great as a meal prep idea. Thanks so much, Annie! This recipe always works perfectly!

  5. E
    Elle Feb 24, 2022

    How do you make a keto gravy?

    1. Annie Lampella
      Annie Mar 3, 2022

      I mix the dripping with a little bit of butter and 1/2 teaspoon of arrowroot powder. Then whisk in heavy cream and chicken broth. Let cook until thickened. Season with salt and pepper.

  6. D
    Donald Perkins Jan 5, 2022

    This is recipe is easy and fun!

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