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Maple Mustard Pork Loin sliced on a wooden cutting board

Slow Cooker Maple Mustard Pork Loin

  • Author: Glenda Embree
  • Total Time: 2 hours 5 minutes
  • Yield: 6 - 8 servings 1x


Crock Pot Maple Mustard Pork Loin is a simple and delicious main dish.  The mustard gives it a wonderful flavor and is tempered ever so slightly by the sweetness of pure maple syrup.  Cajun seasoning adds a light kick of spice that rounds out a delightful flavor profile.  Your crock pot makes this simple dish a breeze to prepare.


Units Scale
  • 3 to 4 lb. pork loin
  • 1/3 cup pure maple syrup (not pancake syrup, the real thing)
  • 1/3 cup stone ground mustard
  • 1 Tablespoon Cajun Seasoning (Since every blend is a little different, I recommend the homemade Cajun seasoning I created the recipe with. If you have a favorite store-bought blend, you could definitely try it, though.)
  • 1 Tablespoon salt


  1. Score the fat cap of the pork loin in a criss-cross pattern.
  2. Lay the pork loin roast in your slow cooker, fat cap up.
  3. Sprinkle the Cajun seasoning over the top of the pork loin and rub it into all the nooks and crannies of the scoring you just completed.
  4. Sprinkle the salt over the top of the loin.
  5. Mix together the maple syrup and stone ground mustard.  Pour it over the top of the pork loin in your crock pot.
  6. Put the lid on your slow cooker and set it on LOW.
  7. Cook for 2 to 2 1/2 hours, until the internal temperature of the loin is 145° F.
  8. Remove the pork loin to a cutting board to rest and loosely tent it with a piece of foil.  (I actually just set my slow cooker lid over the top of it.)
  9. Allow to rest for at least 10 minutes.  The internal temperature will keep rising as it rests and the connective tissues will relax and allow the juices to redistribute through the meat.  Don’t try to carve it without the rest period or you will end up with dry pork.
  10. After some time to rest, carve the pork loin into slices of your desired thickness.
  11. Pan drippings in the bottom of the slow cooker can be served as a delicious drizzle over the meat and minced parsley is a pretty garnish.


I haven’t made this recipe in the oven, but the principles should be nearly the same. Preheat the oven to 350°, which is higher than the slow cooker. Put the pork loin roast in a roasting pan or a deep cake pan (fat cap up) and roast 20-25 minutes per pound. So for a 4 pound pork loin, it would take around an hour and 40 minutes, in the oven. You still need to check for that internal temp of 145° F and rest the meat before slicing.

  • Prep Time: 5 minutes
  • Cook Time: 2 hours
  • Category: Main Dish, Meat, Pork
  • Method: Slow Cooker
  • Cuisine: American

Keywords: pork loin, slow cooker, mustard, maple syrup, Cajun seasoning