Sweet Potato Acorn Squash Au Gratin


This is a great Thanksgiving side dish. Garnish with fresh thyme sprigs.

Prep Time:
15 mins
Cook Time:
55 mins
Total Time:
1 hrs 10 mins
8 servings


  • ¼ cup unsalted butter, divided

  • 1 cup diced onion

  • 2 tablespoons minced garlic

  • 4 cups 3/4-inch sweet potato slices

  • 2 cups heavy whipping cream, divided

  • 1 cup 1-inch peeled acorn squash cubes

  • 2 sprigs fresh thyme, leaves removed

  • kosher salt and ground black pepper to taste

  • ½ cup seasoned bread crumbs

  • ¼ cup grated Asiago cheese


  1. Melt 2 tablespoons butter in a heavy saucepan over medium heat. Cook and stir onion and garlic in hot butter until onion is golden and soft, 5 to 10 minutes.

  2. Stir sweet potatoes, 1 3/4 cups cream, acorn squash, thyme, kosher salt, and pepper into onion mixture. Bring to a boil, reduce heat to low, and simmer until potatoes and squash are tender, 20 to 25 minutes.

  3. Preheat oven to 385 degrees F (195 degrees C). Butter an 8x13-inch baking dish with remaining butter.

  4. Pour potato-squash mixture into prepared baking dish. Drizzle remaining cream over potatoes and squash; top with bread crumbs and Asiago cheese. Cover baking dish with aluminum foil.

  5. Bake in the preheated oven until tender and hot throughout, 25 to 35 minutes. Remove aluminum foil and bake until top is golden brown, about 10 minutes more.

Cook's Note:

You can substitute 1/2 teaspoon dried thyme for the fresh thyme, if desired.

You can substitute panko bread crumbs for the seasoned bread crumbs, if desired.

If preparing in advance, strain potato-squash mixture from cream, cooling cream and potato-squash mixtures separately. Reserve, chilled, until ready to assemble.

Nutrition Facts (per serving)

372 Calories
29g Fat
25g Carbs
5g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 372
% Daily Value *
Total Fat 29g 37%
Saturated Fat 18g 91%
Cholesterol 100mg 33%
Sodium 285mg 12%
Total Carbohydrate 25g 9%
Dietary Fiber 3g 11%
Total Sugars 5g
Protein 5g
Vitamin C 6mg 32%
Calcium 113mg 9%
Iron 1mg 6%
Potassium 387mg 8%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.