Scalloped Potatoes Au Gratin

Scalloped Potatoes Au Gratin are a combination of two classic potato casseroles – Potatoes Au Gratin and Scalloped Potatoes. This is an easy and classic recipe that is perfect to share with family and friends over Thanksgiving, Christmas or Easter. 

Scalloped Potatoes Au Gratin

Looking for more holiday side dishes? You’ll love my Sweet Potato Casserole, my Baked Homemade Mac and Cheese, and my Cheesy Corn Casserole

Scalloped Potatoes Au Gratin

Why You’ll Love Scalloped Potatoes Au Gratin

In this Scalloped Potatoes Au Gratin side dish, we combine thinly sliced potatoes with layers of onions and smother them in a creamy cheese sauce. It’s seasoned to perfection and then baked until tender, bubbly and golden brown. 

Lusciously creamy and decadently cheesy thin gold potatoes, this is one side dish that’s a must on your holiday table. If I had to choose between mashed potatoes and gravy and scalloped potatoes au gratin, I’d choose these every time! 

Not only are these a crowd-favorite, they look stunning and impressive on the table and they are surely worthy of a special occasion. 

Scalloped Potatoes Au Gratin

Key Elements 

  • Potatoes – The best option for this side dish is Yukon gold potatoes. They have a tender skin that won’t require any peeling. You can also use red potatoes, Russet or Idaho potatoes but Yukon’s tend to hold their shape without crumbling.
  • Onions – We couldn’t prepare these scalloped potatoes without thinly sliced onions. Not only are they a classic in this recipe, they add lots of flavor.
  • Cream-Cheese Sauce A quick cream sauce made with flour, butter, milk and plenty of sharp and flavorful cheeses and plenty of seasoning. 
  • Seasonings Simple seasonings in this recipe include salt, pepper, fresh garlic and a little mustard powder. 

Scalloped Potatoes Au Gratin

What Potatoes are Best for Scalloped Potatoes?

When choosing a potato for these scalloped potatoes au gratin, I recommend Yukon gold or red potatoes. They are starchy enough to help thicken the cheesy cream sauce but will also turn out soft and tender without crumbling the way russet/baker potatoes will. 

To ensure even cooking, use a mandoline to slice your potatoes and onions. This will keep the thickness at 1/8 – 1/4 inch and will all be uniform in size.

Scalloped Potatoes Au Gratin

How to Make Scalloped Potatoes Au Gratin

Before you start, be sure to scrub the skin on the potatoes all over since we are leaving the potato skins on in this recipe. For the full detailed and printable Scalloped Potatoes Au Gratin recipe, see recipe card further down the page.

Step 1: Use a mandoline to cut the potatoes to a uniform 1/8-1/4″ thickness. Repeat with the onions, cutting them in rings as thin as possible. Stack them in layers with onion rings in between each potato slice. Plate the stacks upright in a buttered baking dish (2.5 – 3 quart).

Scalloped Potatoes Au Gratin Scalloped Potatoes Au Gratin

Step 2: Make the cream-cheese sauce by melting butter in a saucepan with garlic and saute. Whisk in flour and cook 2-3 minutes. Add in the seasonings and half and half, whisking until smooth. Allow to simmer until it reduces. Stir in the cheeses. 

Scalloped Potatoes Au Gratin

Step 3: Spoon over the cream-cheese sauce over the potatoes and onions in the casserole dish. Cover with foil that’s been sprayed with nonstick spray and bake covered for 1 hour. Remove the foil and bake an additional 20-30 minutes or until it’s browned and bubbly.  Scalloped Potatoes Au Gratin

Tools I Love:

Round 3 QT Casserole Dish

Staub Red Casserole Dishes

Mandoline Slicer

Scalloped Potatoes Au Gratin

Looking for More Holiday Recipes?

Cheesy Jiffy Corn Casserole
Jiffy Corn Casserole

Baked Homemade Macaroni & Cheese
Homemade Macaroni and Cheese

Sweet Potato Casserole
Southern Sweet Potato Casserole

Scalloped Potatoes Au Gratin

Looking for More Holiday Dishes?

I hope you enjoy this easy recipe for Scalloped Potatoes Au Gratin. Be sure to comment below with any questions or feedback!

If you make these or any other recipes, don’t forget to tag me on IG @BadBatchBaking to be featured on my story. Seeing your recreations makes my day!

Scalloped Potatoes Au Gratin

Scalloped Potatoes Au Gratin
Print Recipe
5 from 1 vote

Scalloped Potatoes Au Gratin

Potato paired with cream and cheese are baked to perfection in this delicacy. This is THE perfect potato dish, combining elements of scalloped potatoes and au gratin potatoes, making this the most luxurious of all potato casseroles
Prep Time30 minutes
Cook Time1 hour 30 minutes
Course: Side Dish
Servings: 8 servings
Author: Mallory Austin


  • 2.5-3 pounds red potatoes
  • 1 onion
  • 4 tablespoons butter
  • 4 cloves garlic minced
  • 3 tablespoons flour
  • 1.5 teaspoons dry mustard powder
  • 2.5 cups half and half
  • 1.5 cup cheddar cheese shredded
  • 1 cup gruyere cheese shredded
  • salt & pepper to taste


  • Preheat oven to 400°F.
  • Scrub potatoes well then slice into ⅛" thin slices using a mandoline. Slice onion as thin as possible, using a mandoline for uniform slices.
  • Layer potatoes and onions in little stacks and place upright in a buttered/greased 2.5-3 quart casserole dish.
  • Melt butter in a saucepan then add garlic and saute until fragrant. Add the flour and cook for 2-3 minutes over medium low heat, stirring constantly.
  • Add the seasonings and whisk in the half and half. Continue whisking until thick and bubbly. Remove from heat and stir in cheeses until melted.
  • Spoon cheese sauce over potatoes. Cover with foil (sprayed with cooking spray) and bake for 1 hour.
  • Remove foil and bake an additional 20-30 minutes or until lightly browned and potatoes are cooked. Cool 15 minutes before serving.
Rate This

You Might Also Like


  • Reply
    Veronica Hanson
    November 21, 2023 at 6:06 am I'm just starting to consider what I'll do for food on Thursday while living abroad. This looking amazing and you make me actually feel like I can cook it!

    5 stars

    • Reply
      November 21, 2023 at 10:27 pm Hi Veronica - this is such a wonderful compliment. I try to make all of my recipes attainable for people of all skill levels in the kitchen. Good luck on Thursday, let me know how this dish turns out (if you decide to make it). God bless!

    Leave a Reply

    Recipe Rating

    CommentLuv badge