Total Time
3hrs 5mins
Prep 5 mins
Cook 3 hrs

Saw this in one of my cookbooks, looks interesting, and posting for future use.

Ingredients Nutrition


  1. Saute onion in butter in a skillet. Add mustard, salt, pepper, milk, and cheese.
  2. Place potatoes in a slow cooker.
  3. DO NOT press down.
  4. Pour mixture over potatoes.
  5. Cover and cook on low for 3-4 hours.
  6. Toss potatoes with a large spoon when ready to serve.
Most Helpful

5 5

These were great potatoes. Loved that the sauce was not thin/soupy and had a good amount of cheese. Would be good with some diced ham or smoked sausage mixed in for a one-pot meal. Made for Spring PAC 2014.

5 5

Great twist on Au Gratin Potatoes! We loved the hint of mustard and that like most Au Gratin Potatoes there is no added flour. I could the potatoes the night before and then put in the crock pot for 4 hours and it worked out perfectly. I set aside some for my lunch and a photo but when I went to fix my plate for photographing and eating, found that DH had helped himself it Errrr. Guess that means he liked them LOL. Thanks for the post.