Sweet Potatoes au Gratin

Total Time

Prep: 10 min. Bake: 40 min.


6 servings

Updated: Oct. 20, 2023
This rich, sweet potato casserole couldn't be any easier to make—or more delicious to eat! —Patti Kirchhoff, Lake Geneva, Wisconsin
Sweet Potatoes au Gratin Recipe photo by Taste of Home


  • 2 large uncooked sweet potatoes, peeled and sliced 1/4 inch thick
  • 1 large egg
  • 2 cups heavy whipping cream
  • 3/4 teaspoon salt
  • 1/8 teaspoon ground nutmeg
  • Pinch pepper
  • 3 tablespoons grated Parmesan cheese
  • Minced fresh thyme, optional


  1. Place potatoes in a greased 8-in. square baking dish. In a bowl, beat egg. Add cream, salt, nutmeg and pepper; mix well. Pour over potatoes; sprinkle with cheese. Bake, uncovered, at 375° until the potatoes are tender, 40-45 minutes. If desired, top with fresh thyme to serve.

Nutrition Facts

1 serving: 412 calories, 31g fat (19g saturated fat), 124mg cholesterol, 385mg sodium, 30g carbohydrate (14g sugars, 3g fiber), 6g protein.