The Best Butternut Squash and Potato Gratin

Thanksgiving is in 3 short days, can you believe it? If there is anything that needs to be on the table come Thursday, it’s this. The Best Butternut Squash and Potato Gratin.

As you all know, I am obsessed with Butternut Squash (as I like to all it- Butt Squash) & I definitely don’t stray away from the cheese, so this gratin is very close to a dream come true.

Butternut Squash and Potato Gratin

If you’ve never made a gratin before, don’t let the fancy little French term scare you.  They are actually SO easy.  Think cheese, cream, garlic, fresh herbs, and veggies of choice all layered into a dish and baked to golden perfection.

This gratin has layers of butternut squash and potatoes with gruyere and parmesan cheese, and literally melts in your mouth every time you take a bite.  It’s definitely my new favorite and will without a doubt be on the Thanksgiving table.

Butternut Squash and Potato Gratin

Butternut Squash and Potato Gratin

Butternut Squash and Potato Gratin
  • Prep Time: 25 mins
  • Cook Time: 50 mins
  • Total Time: 1 hour 15 mins
  • Yield: 6 1x


  • 1 large butternut squash, peeled and sliced into 1/8 inch rounds
  • 2 russet potatoes, peeled and sliced into 1/8 inch rounds
  • 3 T olive oil
  • 6 cloves garlic, minced
  • 2 tsp fresh thyme, minced
  • 1 tsp salt
  • 1/2 tsp freshly ground pepper
  • 4 T butter
  • 1 1/2 c heavy cream
  • 1/2 c whole milk
  • 1 1/2 c shredded gruyere
  • 1 c shredded Parmesan


  1. Preheat oven to 425 degrees and grease 8 x 8 casserole dish.
  2. Peel the butternut squash and potatoes.
  3. Using a mandolin or very sharp knife, cut the squash and potatoes into 1/8 inch thick rounds or half rounds and place into a large mixing bowl. Toss with a few T olive oil.
  4. Heat a saucepan over medium heat. Add butter, cream, milk, and garlic. Cook until butter is melted, stir in fresh thyme, and set aside.
  5. Start layering the potatoes and squash into the dish, alternating colors in 1 even later. Top each layer with salt, pepper, a little gruyere and parmesan. Repeat until you use up all of the taters and squash.
  6. Pour the cream mixture all over the potatoes and squash, and sprinkle the top with the remaining gruyere and parmesan.
  7. Cover gratin with foil and bake for 25 minutes. Remove the foil and bake an additional 25-30 minutes, or until top is golden brown and bubbling.
  8. Let it set for 5-8 minutes before serving.
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  • Reply
    December 28, 2022 at 9:48 pm

    This was incredible! If I could give 10 stars I would. The butternut squash addition to this dish put it over the top. My new go to scalloped potato dish. I didn’t have fresh thyme so I substituted poultry seasoning.

    • Reply
      Lindsay Cola (Tippens)
      January 4, 2023 at 10:59 am

      WOW!! That is the best news ever! Thank you so much for Sharing!!! So happy you enjoyed!

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