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Butternut Squash Au Gratin

Butternut Squash Au Gratin is a decadent side dish that is so perfect for a holiday meal or special occasion! Bubbly parmesan cheese, fresh sage, and sauteed leeks ties this dish together so well.

Course Side Dish
Cuisine American
Diet GlutenFreeDiet
Keyword gluten-free
Prep Time 35 minutes
Cook Time 25 minutes
Servings 8
Calories 190 kcal
Author Amy Rains


  • 2 large butternut squash
  • 1 tbsp avocado oil or olive oil
  • pinch sea salt
  • 2 tbsp butter
  • 2 cups sliced leeks
  • 3 large cloves garlic (minced)
  • 2 tbsp fresh chopped sage
  • 3/4 cup heavy cream or half and half
  • 3/4 cup shredded parmesan cheese
  • salt and pepper to taste


  1. Preheat the oven to 400 degrees F. Prepare the butternut squash by peeling, removing the seeds, and dicing into cubes. Lightly toss with oil, sprinkle with salt, and assemble across a large sheet pan. Transfer to the oven and roast for about 25 - 30 minutes, or until softened.

  2. Meanwhile, heat a large saute pan to medium heat. Add the butter, sliced leeks, garlic, and sage. Saute until softened and golden brown, stirring occasionally. This should take 10-12 minutes. Set aside.

  3. Once the butternut squash is ready, remove from oven. Prepare a smaller casserole dish (9x9, 8x11). Layer the dish as follows: start with half of the leek mixture, then arrange half of the butternut squash on top. Add another layer of leeks, and top with another layer of butternut squash. Pour the cream on top, then sprinkle with parmesan cheese.

  4. Bake uncovered at 375 F for 27-30 minutes, or until bubbly and golden. Remove from heat. Sprinkle with salt and pepper to taste.

Nutrition Facts
Butternut Squash Au Gratin
Amount Per Serving
Calories 190 Calories from Fat 72
% Daily Value*
Fat 8g12%
Saturated Fat 4g25%
Cholesterol 17mg6%
Sodium 169mg7%
Potassium 757mg22%
Carbohydrates 27g9%
Fiber 4g17%
Sugar 5g6%
Protein 7g14%
Vitamin A 20470IU409%
Vitamin C 43mg52%
Calcium 247mg25%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.