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This cheese scalloped potatoes recipe uses both yellow potatoes and sweet potatoes along with onions, white sauce, and lots of cheese to make the ultimate cheesy au gratin potatoes.

Sweet Potato Au Gratin (with Yellow Potatoes & Gruyère)

Leah Beyer
This cheese scalloped potatoes recipe uses both yellow potatoes and sweet potatoes along with onions, white sauce, and lots of cheese to make the ultimate cheesy au gratin potatoes.
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Prep Time 20 minutes
Cook Time 1 hour
Total Time 1 hour 20 minutes
Course potatoes, Side Dish
Cuisine American
Servings 12 servings
Calories 364 kcal

Ingredients
  

Instructions
 

  • Slice potatoes with a mandoline. Slice the onions. Mix together in a bowl and season with salt and pepper.
    Peel and slice your potatoes. I used a rotary cheese grater and mandoline to slice these potatoes up. Slice onions. Put them in a bowl and season with salt and pepper.
  • Melt butter in a sauce pan with the minced garlic. Stir in the flour and let cook for one minute.
    Butter, garlic, and flour making a roux for white sauce for scalloped potatoes.
  • Slowly add the heavy cream, stirring constantly. Then pour in the milk. Season with salt and pepper. When the white sauce just begins to boil, remove from heat and stir in thyme.
    Make the cream sauce by melting the butter with minced garlic in a saucepan over medium heat.
  • Make the casserole. Start with a quarter of the white sauce and shredded Grueyere cheese. Layer a single layer of 1/3 of the potatoes and onions. Pour the next quarter of the what sauce and cheese, then potatoes and onions. Repeat again. Then top off with the cheddar cheese as well.
    Follow up with a layer of 1/3 of the yellow potatoes, sweet potatoes, and onions. Then, follow up with 2 more layers of sauce, gruyere cheese, and potatoes. End with the sauce.
  • Cover with aluminum foil and bake for one hour. Remove the foil for the last 10 minutes of baking.
    Top the final layer of white sauce with the shredded cheddar cheese.
  • If potatoes are not soft to a fork at an hour, keep cooking until potatoes are soft.
    This cheese scalloped potatoes recipe uses both yellow potatoes and sweet potatoes along with onions, white sauce, and lots of cheese to make the ultimate cheesy au gratin potatoes.

Nutrition

Calories: 364kcalCarbohydrates: 27gProtein: 14gFat: 23gSaturated Fat: 14gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gTrans Fat: 0.2gCholesterol: 72mgSodium: 300mgPotassium: 578mgFiber: 3gSugar: 5gVitamin A: 6156IUVitamin C: 17mgCalcium: 386mgIron: 1mg
Keyword au gratin potatoes, scalloped potatoes, Sweet Potatoes, yellow potatoes
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