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

Sweet Potato Gratin

Katerina | Diethood
Lightened up, creamy, cheesy, seasoned sauce makes this sweet potato gratin simply irresistible!
Servings : 6 Serves
Prep Time 10 mins
Cook Time 45 mins
Total Time 55 mins


  • 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


Calories: 270 kcal | Carbohydrates: 38 g | Protein: 10 g | Fat: 8 g | Saturated Fat: 4 g | Cholesterol: 28 mg | Sodium: 225 mg | Potassium: 688 mg | Fiber: 4 g | Sugar: 12 g | Vitamin A: 21720 IU | Vitamin C: 4.7 mg | Calcium: 314 mg | Iron: 1.4 mg | Net Carbs: 34 g

Nutritional info is an estimate and provided as courtesy. Values may vary according to the ingredients and tools used. Please use your preferred nutritional calculator for more detailed info.

Course: Side Dish
Cuisine: American
Keyword: healthy potato gratin recipe, sweet potato recipe