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easy au gratin potatoes

(4 RATINGS)
1.46K Pinches 10 Photos
nmetrick avatar
Canastota, NY
Updated on Oct 30, 2025

I make this as a side dish. You can also add about a cup of cubed cooked ham to make this a main dish.

Blue Ribbon Recipe

Oh, how we loved these rich and creamy au gratin potatoes. The cheddar cheese melts and combines with the heavy cream to form a thick and creamy sauce. Fresh onion gives a punch of flavor to the potatoes. Romano and cheddar cheese are sprinkled on top. Romano cheese is savory and is a nice touch. The hardest part of this side dish is peeling and slicing the potatoes. After that, it only takes a few minutes to prepare. This is the perfect potato side dish for when you want to indulge during the holidays.

— The Test Kitchen
prep time 15 Min
cook time 45 Min
method Bake
yield 8 serving(s)

Ingredients

  • 2 1/2 pounds potatoes, thinly sliced
  • 1 medium white onion, thinly sliced
  • 2 cups heavy cream
  • 8 ounces sharp cheddar, shredded and divided
  • 1/4 cup all-purpose flour
  • - salt and pepper, to taste
  • 1 cup grated Romano cheese

How To Make easy au gratin potatoes

  • Sliced onions and potatoes in a bowl.
    Step 1
    Preheat oven to 375 degrees. Peel and slice potatoes very thin. Slice onions thin as well. Place them both in a large mixing bowl.
  • Heavy cream, sharp cheddar cheese, salt, and pepper added to onions and potatoes.
    Step 2
    Add to the potato and onions, 2 cups of heavy cream, flour, and 1 cup of sharp cheddar cheese. Salt and pepper to taste. Toss until completely mixed.
  • Potatoes poured into a baking dish sprayed with non-stick spray.
    Step 3
    Spray a shallow baking dish with non-stick spray. Transfer the mixture to the baking dish and spread out evenly.
  • Shredded cheddar and Romano cheese sprinkled on top.
    Step 4
    Top with remaining cup of shredded cheddar and Romano cheeses.
  • Au gratin potatoes baking in the oven.
    Step 5
    Bake about 45 to 50 minutes until potatoes are tender and the top is nicely browned.
  • A serving of Easy Au Gratin Potatoes on a plate.
    Step 6
    Let stand 10 minutes before serving.
  • Last Step: Don't forget to share! Post a picture of your finished recipe here and on your favorite social network. Don't forget to tag Just A Pinch and include #justapinchrecipes!

Nutrition Facts

(per serving*)
calories: 495kcal, carbohydrates: 32g, cholesterol: 109mg, fat: 35g, fiber: 3g, protein: 16g, saturated fat: 21g, sodium: 554mg, sugar: 4g, unsaturated fat: 13g
*Daily Values are based on a 2,000 calorie diet. Nutrition information is estimated.

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