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Potatoes Au Gratin

  • March 7, 2016
  • By casualonthecoast
Potatoes Au Gratin

Potatoes Au Gratin

Potatoes Au Gratin

First & foremost, I’d like to personally welcome you to the new & improved!  We have been hard at work implementing the new site design and it’s part of the reason for my unplanned hiatus!  Going forward, you can expect to find 2-3 new posts weekly!  I hope you will enjoy the new, simplified design with easy access to recipes and different categories.  I am still working out a few kinks so please feel free to comment if something isn’t working properly for you.  Thanks for stopping by and supporting!

Now onto the GOOD stuff!  This Potatoes Au Gratin recipe has long been in the making from our test kitchen!  We’ve tried multiple times to recreate the deliciousness that is so easily found in the box from the grocery store.  Potatoes Au Gratin are easy to replicate at home and I’m happy to report that our version is BETTER than the boxed kind!  This recipe will be an especially great side dish for any of your Easter gatherings, pairing well with roasted lamb or ham!


Potatoes Au Gratin


  • 4 tablespoons unsalted butter, divided
  • 1 yellow onion, thinly sliced
  • 3 garlic cloves, minced
  • 1 tablespoon grainy mustard
  • 2 cups half-and-half
  • 2 pounds potatoes, peeled and thinly sliced
  • Salt and pepper to taste
  • ½ teaspoon freshly grated nutmeg
  • Cooking Spray
  • ¾ cup grated Gruyère cheese
  • Chopped fresh rosemary


  1. Preheat the oven to 375°F.
  2. In a large pot, heat the butter over medium heat. Add the onion and sauté until translucent, 4 to 5 minutes. Add the garlic and cook until fragrant for 1 minute being careful not to burn.
  3. Stir in mustard, half and half and bring to a simmer. Add the potatoes and simmer for 5-7 minutes. Season with salt, pepper and nutmeg.
  4. Pour the potato and sauce mixture into a greased casserole dish and spread into an even layer. Top with cheese.
  5. Bake until the the sauce is bubbly, the cheese is golden and the potatoes are easily pierced with a fork 30-35 minutes. Garnish with chopped fresh rosemary.

If you like this recipe- please pin it using the image below!Potatoes Au Gratin Scalloped Potatoes

By casualonthecoast, March 7, 2016
  • 2
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