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4.6 from 246 votes

Mustard Pork Loin Roast

Mustard Pork Loin Roast is wonderfully tender and flavored with an ultra tasty mustard sauce. This recipe is easy enough for a weeknight meal and definitely pretty enough to serve for holidays and special occasions!

Prep Time
30 mins
Cook Time
1 hr 30 mins
Total Time
1 hr 45 mins
Servings: 8 servings
Calories: 271 kcal
Course: Dinner
Cuisine: American

Ingredients

for the mustard sauce:
  • ¼ cup Stone ground mustard
  • 1 tablespoon Dijon mustard
  • 1 tablespoon yellow prepared mustard
  • 2 teaspoons minced fresh rosemary
  • 1 teaspoon olive oil
  • 1 teaspoon honey
  • ½ teaspoon sweet curry
for the pork loin roast:
  • 1 3.5 pound boneless pork loin roast not pork tenderloin
  • 4 large cloves garlic minced
  • 2 teaspoons kosher salt
  • ½ teaspoon freshly ground black pepper
  • 2 teaspoons canola oil
  • minced fresh rosemary and parsley optional garnish

Instructions

    Cup of Yum
  1. for the mustard sauce: In a small bowl, combine all mustard sauce ingredients. Set aside.
  2. for the pork loin roast: Pat the pork loin dry using paper towels. With kitchen string, tie up the pork loin every 2 inches. Reference the photo from this post that shows how this should look.
  3. Create a simple garlic paste by sprinkling the salt over the minced garlic, right on the cutting board. Angle the knife blade (I like to use a knife with a larger blade, such as a Santoku knife or chef's knife.) so it's laying almost flat on the cutting board, pressing and scraping the garlic and salt together. The garlic pieces will start to soften and smash, and combine with the salt to form a paste. Keep pressing and scraping until you have a smooth paste. Sprinkle pepper over the paste, and then press and scrape a few more times to incorporate. Rub this mixture over all sides of the pork loin. Set aside at room temperature.
  4. Preheat oven to 350° F.
  5. Place a 12" cast iron skillet or stainless steel straight-sided skillet on stovetop and heat to medium-high. Add canola oil and heat until shimmering. Carefully add pork loin, fat cap side down. Sear until deep golden brown and when it releases easily from the skillet, about 4 to 5 minutes per side. Once all four sides have browned, transfer pork loin with the fat cap facing up to a rack set inside a roasting pan. If you do not have one of these, simply place a cooling rack inside a large rimmed pan. I like to line my rimmed pan with aluminum foil for easy clean up.
  6. Brush seared pork loin on all sides with mustard sauce, using all of the sauce for a 3-1/2 pound pork loin. Tent a large piece of aluminum foil (I like these extra large, heavy duty rolls) loosely over the pork loin, keeping the foil from touching the pork. Cook for 35 minutes. Remove foil tent and cook for another 15 to 20 minutes or so, or until an instant-read thermometer inserted into the thickest part of the pork reads 145° F. I start checking the temperature after the pork has cooked for 10 minutes without the foil tent. Do not over cook. Remove pork loin from oven and let rest 3 minutes. Remove kitchen string and slice pork loin crosswise into 1/2-inch slices. Serve hot, sprinkled with minced fresh rosemary and parsley if desired.

Notes

  • Mustard sauce can be made a day or two in advance of cooking the pork loin; simply keep it refrigerated.
  • The pork loin can be tied up, rubbed with garlic paste, and refrigerated one day prior to cooking. Remove from the refrigerator 30 minutes prior to preheating the skillet and oven.
  • Refrigerate any leftover pork in an airtight container for up to 4 days. Or freeze for another meal or two later on.
  • from a farmgirl's dabbles

Nutrition Information

Serving 1 Calories 271kcal (14%) Carbohydrates 1g (0%) Protein 33g (66%) Fat 14g (22%) Saturated Fat 4g (20%) Polyunsaturated Fat 8g Cholesterol 104mg (35%) Sodium 640mg (27%) Sugar 1g (2%)

Nutrition Facts

Serving: 8servings

Amount Per Serving

Calories 271

% Daily Value*

Serving 1
Calories 271kcal 14%
Carbohydrates 1g 0%
Protein 33g 66%
Fat 14g 22%
Saturated Fat 4g 20%
Polyunsaturated Fat 8g 47%
Cholesterol 104mg 35%
Sodium 640mg 27%
Sugar 1g 2%

* Percent Daily Values are based on a 2,000 calorie diet.