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a spatula pulling out au gratin potatoes from a casserole
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4.77 from 21 votes

Easy Potatoes Au Gratin

Easy Potatoes Au Gratin are a classic potato side dish that you can make more easily than you may think! Creamy homemade white sauce with melted cheddar make these cheesy potatoes a recipe the family will love.
Prep Time20 minutes
Cook Time1 hour
Total Time1 hour 20 minutes
Course: Side Dish
Cuisine: American
Keyword: cheesy potatoes, funeral potatoes, potatoes side dish
Servings: 8
Calories: 426kcal
Author: Julie Clark

Ingredients

  • 3 tablespoons salted butter
  • 2 tablespoons all-purpose flour
  • 3 cups half and half cream (or whole milk)
  • 1 teaspoon salt
  • 1/2 teaspoon ground black pepper
  • 3 cups cheddar cheese, divided (or Gruyere cheese)
  • 6 cups thinly sliced potatoes (about 2 1/2 pounds)
  • 1/4 cup diced onion
  • 1 tablespoon freshly snipped parsley
US Customary - Metric

Instructions

  • Melt the butter in a saucepan over medium heat. Add the flour and whisk until combined. Cook and stir constantly for 2-3 minutes. 3 tablespoons salted butter, 2 tablespoons all-purpose flour
  • Slowly stir in 1 cup of cream (or milk) and whisk until smooth. 3 cups half and half cream
  • Stir in the remaining cream, salt and pepper. Whisk constantly until the mixture starts to thicken. This will take 3-5 minutes. 1 teaspoon salt, 1/2 teaspoon ground black pepper
  • Add in 2 cups of the shredded cheddar cheese and stir until smooth. Remove the white sauce from the stove. 3 cups cheddar cheese, divided
  • Preheat the oven to 400º Fahrenheit. Spray a 9x13" baking pan with cooking spray.
  • Place half of the potatoes in the greased pan. Cover them with the onions and half of the sauce. 6 cups thinly sliced potatoes, 1/4 cup diced onion
  • Place the remaining potatoes in the pan and then pour the remaining sauce overtop.
  • Cover the pan with foil and bake for 40 minutes.
  • Uncover the pan, sprinkle the remaining cup of shredded cheddar over the top and bake uncovered for an additional 15-20 minutes or until the top of the potatoes are lightly browned, the cheese is metled and the potatoes are tender. The exact timing will depend on how thick you have cut the potatoes.
  • Top with fresh parsley, if desired. Serve warm. 1 tablespoon freshly snipped parsley

Video

Notes

The calories shown are based on the recipe serving 8 people, with 1 serving being about 1 cup of potatoes. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.

Nutrition

Calories: 426kcal | Carbohydrates: 26g | Protein: 17g | Fat: 28g | Saturated Fat: 18g | Cholesterol: 89mg | Sodium: 644mg | Potassium: 817mg | Fiber: 4g | Vitamin A: 875IU | Vitamin C: 19.1mg | Calcium: 449mg | Iron: 5.5mg