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Simple Au Gratin Potatoes

These homemade au gratin potatoes are always welcome at our dinner table, and they're so simple to make. A perfect complement to ham, this homey potato gratin also goes well with pork, chicken and other entrees. —Cris O'Brien, Virginia Beach, Virginia
  • Total Time
    Prep: 20 min. Bake: 1-1/2 hours
  • Makes
    8 servings


  • 3 tablespoons butter
  • 3 tablespoons all-purpose flour
  • 1-1/2 teaspoons salt
  • 1/8 teaspoon pepper
  • 2 cups 2% milk
  • 1 cup shredded cheddar cheese
  • 5 cups thinly sliced peeled potatoes (about 6 medium)
  • 1/2 cup chopped onion
  • Additional pepper, optional


  • Preheat oven to 350°. In a large saucepan, melt butter over low heat. Stir in flour, salt and pepper until smooth. Gradually add milk. Bring to a boil; cook and stir 2 minutes or until thickened. Remove from heat; stir in cheese until melted. Add potatoes and onion.
  • Transfer to a greased 2-qt. baking dish. Cover and bake 1 hour. Uncover; bake 30-40 minutes or until the potatoes are tender. If desired, top with additional pepper.

Potatoes Au Gratin Tips

Why did my potato au gratin curdle?

Curdling can occur when high heat affects the fat in dairy. In this recipe, we thicken the milk with flour to prevent curdling. Starch will also help, so make sure to use a high starch potato like a russet. If you've got leftover russet potatoes, use them up in any of these russet potato recipes!

How do you keep potatoes au gratin from becoming watery?

If your au gratin is watery, replace the milk with heavy cream, which has a higher fat content, next time you prepare the recipe. Also, russet potatoes have less water and more starch, making them ideal for au gratin recipes.

What goes well with au gratin potatoes?

Lemon thyme chicken is easy and delicious—and bakes at the same temperature as the potatoes! Feeling more like a steakhouse dinner? Try a garlic grilled steak or any of our other steak recipes.
Nutrition Facts
3/4 cup: 224 calories, 10g fat (7g saturated fat), 35mg cholesterol, 605mg sodium, 26g carbohydrate (4g sugars, 2g fiber), 7g protein.


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  • Charles
    Sep 15, 2020

    I like au gratin potatoes and was raised on the Betty Crocker boxed ones, problem is my wife hates the consistency of boxed ones. Made these yesterday and we both loved them. Simple and easy to make, we had the leftovers with tonight's dinner and may even have tasted better rewarmed. Definitely keeping this recipe!

  • Cindy
    Aug 17, 2020

    As another reviewer stated. First time followed the recipe to the letter. It turned out ok, was just a little too bland for our taste. Tweaked this time with a little more seasoning and a tad more cheese. Oh, and I topped with breadcrumbs after uncovering.

  • sscripter
    Jul 10, 2020

    I have made this twice, the first time I followed the rescipe but T and to the t and although very delicious my husband and I thought we would add more cheese so stay tuned will let everyone know how they turned out

  • Marika
    Jul 8, 2020

    No comment left

  • Sherin
    Jul 4, 2020

    Excellent recipe altered the timing but over all great thanks for sharing

  • Lkemeralds
    Jul 1, 2020

    I just made these for the first time today. I mixed part sharp cheddar and a Mexican mix. That's what I had. Very good.

  • Deb
    Jun 13, 2020

    Very tasty. I used bits of several different cheeses and reduced the salt. Cooking a hour

  • Dave
    May 28, 2020

    Great the salt, I found it to be too much.

  • Ray
    May 25, 2020

    Why would you cook potatoes for an hour and 40 minutes?

  • Abelardo
    May 24, 2020

    No comment left