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–+ servings
Close, angled shot of a large oval casserole dish filled with cheesy scalloped sweet potatoes and green garnish.

Creamy Scalloped Sweet Potatoes

easyhealthyrecipes.com/scalloped-sweet-potatoes/
Thinly sliced sweet potatoes smothered with a creamy garlic herb sauce and topped with melty, bubbly parmesan.
Prep: 15 minutes
Cook: 50 minutes
Total: 1 hour 5 minutes
Recipe makes approximately 10 servings

Equipment Needed

  • Paper towels
  • Cooking spray
  • 9x13 baking dish ()
  • Small saucepan
  • whisk
  • Aluminum foil

Ingredients Needed

  • 3 pounds sweet potatoes (peeled, sliced into uniform ⅛-inch thick discs)
  • ½ cup butter
  • 3 cloves garlic (minced)
  • ¼ cup all-purpose flour (see Notes)
  • 2 ½ cups heavy cream (at or close to room temperature)
  • 1 tablespoon chopped fresh thyme ()
  • ½ teaspoon salt (more or less to taste)
  • ¼ teaspoon freshly cracked black pepper (more or less to taste)
  • ½ cup freshly grated parmesan cheese (see Notes)
  • sprigs of fresh thyme (optional, for garnish)

Instructions

  • Preheat oven to 400° Fahrenheit. Lightly grease 9x13 baking dish with cooking spray.
    Overhead view of sweet potato slices arranged in a ring around the inside edge of an oval baking dish, with a row of slices in the center.
  • Separate sweet potato slices and pat slices completely dry with paper towels. Arrange sweet potato slices as desired (see Notes) in lightly greased baking dish. Set dish aside.
  • Heat small saucepan over medium heat. When saucepan is warm, add butter and let melt completely, swirling saucepan occasionally to coat bottom in butter.
  • When butter is melted, add minced garlic and sauté 1 to 2 minutes or until garlic is fragrant.
    Overhead view of melted butter in a small saucepan on a neutral blue-gray background.
  • Sprinkle ¼ cup all-purpose flour over top of garlic butter mixture. Whisk quickly until flour is fully incorporated, and continue whisking 2 to 3 minutes or until roux develops golden brown coloring.
  • Remove saucepan from heat and slowly pour in heavy cream. Whisk to incorporate, then return saucepan to heat and continue whisking until heavy cream and roux are fully combined. Reduce heat under saucepan to low and simmer cream mixture approximately 5 minutes or until thickened.
    Overhead view of a small silver saucepan filled with a heavy cream sauce on a neutral blue-gray background.
  • Once cream sauce has thickened, remove saucepan from heat. Add chopped thyme, salt, and pepper and whisk until spices are fully incorporated.
  • Pour cream sauce evenly over top of sweet potato arrangement in baking dish, then cover dish with aluminum foil.
    Overhead view of thinly sliced sweet potatoes covered with a creamy herb sauce in a large oval casserole dish.
  • Cover potatoes with foil and bake for 30 minutes. Then remove foil and sprinkle with parmesan cheese all over top. Bake for another for 10 minutes, or until golden brown and bubbly. Insert fork into center of sweet potatoes - potatoes are ready when fork inserts easily and smoothly.
  • Carefully remove baking dish from oven. Let dish rest 5 to 10 minutes, then garnish with sprigs of fresh thyme if desired and serve warm.
    Overhead view of scalloped sweet potatoes topped with golden brown parmesan cheese in a large oval casserole dish.

Recipe Notes

  • Use a mandoline for super easy and uniform potato slicing. Just watch those fingers!
  • Arranging Sweet Potatoes: Slices can be placed in any arrangement you desire - horizontally in rows, vertically in columns, in a large spiral, or overlapping concentric circles, or even in an intricate design if you feel adventurous. You can also lay them flat or line them upright and leaning against each other. If you stack the potatoes or overlap them a lot, I recommend first adding them to a large bowl with the prepared cream sauce and stirring until the potatoes are fully covered. After that, arrange them as desired. This ensures every bit of the potatoes is covered with the sauce.
  • Make it Gluten Free: Use gluten-free all-purpose flour. 
  • Parmesan: For best results, grate your own parmesan cheese from a block. Pre-packaged grated and shredded cheese contain added fillers to prevent clumping, which also prevent them from melting like they should.

Nutrition Info (Approximate)

Serving: 1serving | Calories: 434kcal | Protein: 6g | Fat: 32g | Saturated Fat: 20g | Trans Fat: 0.4g | Total Carbs: 32g | Fiber: 4g | Sugar: 7g | Net Carbs: 28g | Vitamin C: 5mg | Cholesterol: 95mg | Sodium: 361mg | Potassium: 534mg | Calcium: 147mg | Iron: 1mg