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Close up top view of au gratin potatoes on serving spoon.
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Au Gratin Potatoes

These Au Gratin Potatoes are the ultimate potato side dish. They're creamy, cheesy and incredibly delicious! A great side dish the entire family is going to go crazy over!
Course: Side Dish
Cuisine: American
Keyword: Au Gratin Potatoes, Easy Au Gratin Potatoes
Prep Time: 20 minutes
Cook Time: 1 hour 30 minutes
Servings: 12
Author: Heather


  • Mandoline



  • Peel potatoes and thinly slice them ⅛ inch thick.
  • Preheat oven to 375°F.
  • Melt butter in a large sauce pan over medium heat.
  • Whisk in the flour, garlic powder, onion powder, salt and black pepper. Cook for a minute.
  • Slowly whisk in 2 cups of the cream, followed by the milk.
  • Cook until thickened about 3-4 minutes. Whisk in ¾ cup of the shredded cheese then remove from heat.
  • Layer half of the potatoes in a greased 9x13 deep casserole dish.
  • Pour half of the cheese sauce over the potatoes.
  • Layer the remaining potatoes over the cheese sauce and then top with the rest of the cheese sauce.
  • Drizzle remaining ½ cup of cream over the entire casserole and top with the remaining shredded cheese.
  • Cover with aluminum foil and bake for 1 hour and 15 minutes.
  • Remove foil and bake an additional 15 minutes until the potatoes are fork tender and the edges are bubbly and browned.
  • Let rest for 10 minutes before serving.


Calories: 356kcal | Carbohydrates: 25g | Protein: 7g | Fat: 26g | Saturated Fat: 16g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 90mg | Sodium: 320mg | Potassium: 557mg | Fiber: 2g | Sugar: 2g | Vitamin A: 976IU | Vitamin C: 7mg | Calcium: 141mg | Iron: 1mg
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