Vertical crop Butternut Squash Gratin Casserole with title

Butternut Squash Gratin Casserole

Butternut Squash Gratin Casserole is a delicious and healthy side dish that’s great for a special meal like Thanksgiving, or just as at home for a busy weeknight dinner.

Course Main Course, Side Dish
Cuisine American
Keyword butternut squash, casserole
Prep Time 20 minutes
Cook Time 1 hour 20 minutes
Total Time 1 hour 40 minutes
Servings 4 servings
Calories 321 kcal
Author Debi


  • 1 large butternut squash peeled, seeded, cut into 3/4- to 1-inch cubes
  • 3 tablespoons olive oil divided use
  • ½ teaspoon kosher salt plus 1 pinch salt
  • ½ teaspoon freshly ground pepper divided use
  • 4 leeks white and pale green parts only, cleaned and sliced
  • 1 tablespoon fresh thyme leaves
  • 4- ounce log soft fresh goat cheese
  • 1/3 cup whole milk
  • Additional fresh thyme for garnish


  1. Preheat oven to 400°F. Place butternut squash cubes in large bowl, and drizzle with oil, ½ teaspoon salt, and ¼ teaspoon pepper, and toss to coat. Spread squash cubes onto a large rimmed baking sheet, and roast until just tender and beginning to brown, stirring occasionally, about 35 minutes.
  2. Meanwhile, in a large heavy skillet over medium-low heat, add oil. Once oil is hot, add leeks and thyme, and sprinkle with a pinch of salt and ¼ teaspoon pepper. Sauté until tender but not brown, about 15 minutes.
  3. Coat 13x9-inch baking dish with a light drizzle of oil or cooking spray. Spread half of leek mixture over bottom of baking dish. Sprinkle with half of squash and half of goat cheese. Repeat layering with leeks, squash, and goat cheese.
  4. The gratin can be made one day ahead to this point, cover and chill until ready to bake.
  5. Preheat oven to 375°F. Pour milk evenly over gratin. Bake, uncovered, until gratin is heated through, about 30 minutes (40 minutes if previously chilled). Enjoy.

Recipe Notes

serves 4 as a side dish

Adapted from Bon Appetit

Nutrition Facts
Butternut Squash Gratin Casserole
Amount Per Serving
Calories 321 Calories from Fat 162
% Daily Value*
Fat 18g28%
Saturated Fat 6g38%
Cholesterol 15mg5%
Sodium 139mg6%
Potassium 858mg25%
Carbohydrates 36g12%
Fiber 6g25%
Sugar 9g10%
Protein 9g18%
Vitamin A 21824IU436%
Vitamin C 53mg64%
Calcium 212mg21%
Iron 4mg22%
* Percent Daily Values are based on a 2000 calorie diet.