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PERFECT Au Gratin Potatoes

Perfectly creamy, cheesy and flavorful, these are au gratin potatoes at their very best!

Prep Time
10 mins
Cook Time
1 hr 10 mins
Total Time
1 hr 40 mins
Servings: 6 servings
Calories: 397 kcal
Course: Side Dish
Cuisine: French

Ingredients

  • 2 pounds moderate starch potatoes , thinly sliced (Russets will absorb more liquid while Yukon Golds will result in a "saucier" au gratin; it's a matter of personal preference)
  • 3 tablespoons butter
  • 3 tablespoons all-purpose flour
  • 1/2 cup finely chopped yellow onion
  • 2 cloves garlic minced
  • 2 cups whole milk
  • 1/2 cup heavy cream
  • 1 1/2 teaspoons salt
  • 1/4 teaspoon freshly ground black or white pepper (optional)
  • 1 1/2 cups shredded cheddar cheese (do not use pre-shredded, it's dusted with cellulose and doesn't melt as well; another fabulous option is half Gruyere/half Emmentaler)
  • 1/3 cup grated Parmesan cheese divided in half
  • Chopped parsley for garnish

Instructions

    Cup of Yum
  1. Preheat the oven to 350 degrees F.Heat the butter in a large saucepan over medium-high heat and add the onions and cook until soft and translucent, 5-6 minutes.  Add the garlic and cook for another minute.  Add the flour and stir to combine.  Cook for a minute or two.  Add the milk and cream, stirring continually to prevent clumping. Slowly bring to a boil, reduce the heat and simmer until slightly thickened.  Add the cheddar cheese, parmesan cheese and salt and stir until melted.  Add the potatoes and stir until thoroughly combined.
  2. Pour the mixture into a 2 quart casserole dish.  Sprinkle with the remaining Parmesan cheese.  Cover with foil. Bake for 1 hour or until the potatoes are tender (time can vary depending on how thickly the potatoes are sliced).Uncover and bake for another 20 minutes or until the top is lightly browned.Let sit for about 5 minutes before serving.  Sprinkle with some chopped parsley for garnish if desired.  

Notes

  • *Make Ahead: See section in blog post about making this dish ahead of time.

Nutrition Information

Calories 397kcal (20%) Carbohydrates 28g (9%) Protein 16g (32%) Fat 26g (40%) Saturated Fat 16g (80%) Cholesterol 83mg (28%) Sodium 837mg (35%) Potassium 793mg (23%) Fiber 4g (16%) Sugar 4g (8%) Vitamin A 915IU (18%) Vitamin C 18.6mg (21%) Calcium 407mg (41%) Iron 5.3mg (29%)

Nutrition Facts

Serving: 6servings

Amount Per Serving

Calories 397

% Daily Value*

Calories 397kcal 20%
Carbohydrates 28g 9%
Protein 16g 32%
Fat 26g 40%
Saturated Fat 16g 80%
Cholesterol 83mg 28%
Sodium 837mg 35%
Potassium 793mg 17%
Fiber 4g 16%
Sugar 4g 8%
Vitamin A 915IU 18%
Vitamin C 18.6mg 21%
Calcium 407mg 41%
Iron 5.3mg 29%

* Percent Daily Values are based on a 2,000 calorie diet.

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