Yukon Gold Sweet Potato Au Gratin

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

Side Dish | November 22, 2017 | By

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet and Yukon gold potatoes topped with shredded gruyere cheese and fresh thyme all baked until bubbly and golden in a deliciously creamy, silky sauce.

Maybe you’ve made classic Au Gratin Potatoes ~ one of my favorite potato-cheesy comfort dishes and while I still love them, the combination of Yukon Gold and sweet potatoes with a rich, creamy sauce just takes potatoes to a whole new level. 

Yukon Gold Sweet Potato Au Gratin makes a simple, yet elevated holiday side, but I can’t help but ask myself why are all these fabulous side dishes saved for the holidays? Let’s make it today!

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

If you’ve been following along you’ve read all about my husband’s conservative palate, so it shouldn’t come as a surprise when I tell you about the face he made when he realized under that golden cheesy goodness was not one, but two kinds of potatoes together in one dish.

I’m happy to say though that one bite changed his mind and his face. “Mmmm these are damn good”. High praise, my friends. The highest. He also threw out one of his favorite lines – “who else is coming for dinner?”, code for ‘you made way too much food’, something I routinely do, but that didn’t stop us from making a serious dent in it. 

I baked the Yukon Gold Sweet Potato Au Grain in a shallow quiche dish that I bought a couple of weeks ago at an estate sale which is a great place to buy casserole dishes, among other things at bargain prices.

Afterward, with the no-return policy, I was kind of kicking myself  since I’ve never made quiche, but maybe I’ll make one now. In any event,  the dish came in handy for this recipe. If you don’t have one, another shallow baking dish will work well, too.

Yukon Gold Sweet Potato Au Gratin Ingredients:

  • 1 pound Yukon gold potatoes
  • 1 pound sweet potatoes
  • 1 tablespoon butter
  • 2 cups heavy cream
  • Pinch of nutmeg
  • 1 ½ teaspoons fresh thyme, finely chopped
  • 1 ¼ teaspoons salt
  • ½ teaspoon pepper
  • 2 cups gruyere cheese, grated
  • Aluminum foil
  • Cooking spray

Preheat the oven to 375, then in a medium saucepan, add the heavy cream, nutmeg, thyme, salt and pepper. Simmer over low heat 5 minutes, stirring occasionally.

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

Peel the sweet potatoes, leave the skins on the Yukon gold, then thinly slice both about the same thickness.

If you have a mandoline, you can certainly use it. I didn’t feel like getting mine out – actually I didn’t feel like washing it afterward (it had been a long day) so I sliced them with a sharp knife.

Generously butter your baking dish with the tablespoon of butter, then add the first layer of potatoes, overlapping them. Don’t worry about Yukon, Sweet, Yukon, Sweet ~ as long as there’s a mixture of both, it’ll be delicious.

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

Top with about ⅓ of the Gruyere cheese, another layer of potatoes, topped with another ⅓ of the cheese then pour all of the cream mixture over the top of the potatoes. Add the remaining cheese then gently press down on the potatoes with a spatula or your fingers.

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

Measure a sheet of aluminum foil slightly larger than your baking dish then spray the center of the underside with cooking spray to prevent the cheese from sticking to the foil during the baking process.

Cover the potatoes and bake for 30 minutes. Uncover and continue baking another 20-25 minutes or until the potatoes are tender, golden brown and bubbly.

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

I love how this dish looks sophisticated yet rustic at the same time. Yukon Gold Sweet Potato Au Gratin makes an ideal side any Sunday year around with ham, chicken, steak or pretty much anything.

Yukon Gold Sweet Potato Au Gratin ~ thinly sliced sweet & Yukon gold potatoes topped with gruyere cheese + fresh thyme in a delicious creamy, silky sauce.

This dish will be on repeat at our house from now through Easter brunch. Imagine it with an egg casserole, some fresh fruit and a bellini or mimosa? Who’s in?

Enjoy!

http://www.agoudalife.com/overnight-breakfast-egg-sausage-casserole/

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Yukon Gold Sweet Potato Au Gratin
Ingredients
  • 1 pound yukon gold potatoes
  • 1 pound sweet potatoes
  • 1 tablespoon butter
  • 2 cups heavy cream
  • Pinch of nutmeg
  • 1 ½ teaspoons fresh thyme finely chopped
  • 1 ¼ teaspoons salt
  • ½ teaspoon pepper
  • 2 cups gruyere cheese grated
  • Aluminum foil
  • Cooking spray
Instructions
  1. Preheat the oven to 375, then in a medium saucepan, add the heavy cream, nutmeg, thyme, salt and pepper. Simmer over low heat 5 minutes, stirring occasionally.
  2. Peel the sweet potatoes, leave the skins on the Yukon gold, then thinly slice both, trying to get them about the same thickness.
  3. Use the tablespoon of butter and generously butter your baking dish then add the first layer of potatoes, overlapping them.
  4. Top with about ⅓ of the Gruyere cheese, another layer of potatoes, topped with another ⅓ of the cheese then pour all of the cream mixture over the top of the potatoes. Top with the remaining cheese then using a spatula gently press down on the potatoes.

  5. Measure a sheet of aluminum foil slightly larger than your baking dish the spray the center of the underside with cooking spray. This prevents the cheese from sticking to the foil during the baking process.
  6. Cover the potatoes and bake for 30 minutes. Uncover and continue baking another 20-25 minutes or until the potatoes are tender and golden brown on top.

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