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5 from 6 votes
Sweet Potato Gratin - Lightened up, creamy, cheesy, seasoned sauce makes this sweet potato gratin simply irresistible! 

Sweet Potato Gratin

10 10 10
WW Freestyle: 10
Prep Time10 mins
Cook Time45 mins
Total Time55 mins
Lightened up, creamy, cheesy, seasoned sauce makes this sweet potato gratin simply irresistible!
Course: Side Dish
Cuisine: American
Servings: 6 Serves
Calories: 270


  • 2 pounds sweet potatoes, thinly sliced
  • 2 tablespoons all purpose flour
  • salt and fresh ground pepper, to taste (I add about 1 teaspoon of salt and 1/2 teaspoon black pepper)
  • 1/4 teaspoon ground ginger
  • 1/4 teaspoon ground nutmeg
  • 1/4 teaspoon chili powder OR ground red pepper
  • 1 teaspoon dried thyme
  • 1 can (12 ounces) evaporated milk
  • 1/4 cup grated parmesan cheese
  • 1/2 cup grated swiss cheese or gruyere cheese
  • grated parmesan cheese for garnish (optional)
  • dried parsley for garnish (optional)


  • Preheat oven to 350F.
  • Lightly grease a 9.5 inch baking dish with cooking spray and set aside.
  • In a large bowl, combine sliced sweet potatoes, flour, salt, pepper, ginger, nutmeg, pepper, and thyme; toss to combine.
  • Arrange one layer of sliced sweet potatoes, overlapping slightly, on the bottom of prepared baking dish.
  • Sprinkle with a bit of parmesan and pour about 1/4 cup of evaporated milk.
  • Repeat layers with remaining sweet potatoes, parmesan, and milk.
  • Top with swiss or gruyere cheese.
  • Cover with foil and bake for about 35 minutes.
  • Remove foil and continue to bake for 25 more minutes, or until top is browned and bubbly.
  • Remove from oven and let cool for 30 minutes.
  • Garnish with grated parmesan and dried parsley.
  • Serve.


Adapted from Cooking Light
Nutrition Facts
Sweet Potato Gratin
Amount Per Serving
Calories 270 Calories from Fat 72
% Daily Value*
Fat 8g12%
Saturated Fat 4g20%
Cholesterol 28mg9%
Sodium 225mg9%
Potassium 688mg20%
Carbohydrates 38g13%
Fiber 4g16%
Sugar 12g13%
Protein 10g20%
Vitamin A 21720IU434%
Vitamin C 4.7mg6%
Calcium 314mg31%
Iron 1.4mg8%
* Percent Daily Values are based on a 2000 calorie diet.
Keywords: healthy potato gratin recipe, sweet potato recipe