Au Gratin Potatoes are a family favorite casserole recipe with layers of thinly sliced spuds drenched in a cheesy cream sauce. This potato side dish must be on your holiday table it’s perfect with ham, turkey, pork, chicken and other entrees.

We love a good cheesy potato dish. This recipe pairs perfectly with our Amazing Pulled Pork, Glazed Pork Tenderloin, Flank Steak Sliders, or on any holiday table.

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Potatoes au gratin on a plate

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Au Gratin Potatoes

Potatoes are a staple at any family gathering, especially during the holidays and these au gratin potatoes are always my go-to dish to bring. What can I say, I’m a sucker for anything full of cheesy goodness, so these cheesy covered potatoes will always be a weakness for me. 

This classic dish is simple to throw together in a flash and is enough to feed the whole family and more. So whether you need an easy side to bring to Thanksgiving, or you really want to wow your co-workers at the holiday office party, this is the recipe you’ll want in your back pocket. 

Everyone will be drooling over the amazing cheese sauce, that covers every inch of the thinly sliced russet potatoes. I’m craving some just thinking about it!

Potatoes au gratin in a red casserole dish

What Is The Difference Between Au Gratin Potatoes and Scalloped Potatoes?

The age-old question that you might be asking yourself right now is “What is the difference between scalloped potatoes and au gratin potatoes?”.

It’s not a crazy question because they are both very similar recipes, considering both are made up of potatoes that are baked in a creamy cheese sauce. The main difference is that au gratin potatoes have a sauce that is mostly cheese-based and scalloped potatoes are baked in a cream-based sauce. 

How To Make The Best Au Gratin Potatoes

This simple recipe for au gratin potatoes never fails to impress in any situation. With only 20 minutes of prep time needed, it’s the perfect recipe to throw together last minute. 

All you have to do is, preheat the oven and spray a 9×13 casserole dish with no-stick spray, then layer the potato slices in overlapping rows in the prepared casserole dish.

Once all the potato slices have been placed in the dish, melt the butter in a large saute pan, add the garlic and onions and saute until fragrant. Next, you’ll add the flour, whisk to combine, stir and cook. To finish up making the sauce just add seasonings and milk and whisk over medium heat until thick and bubbly. Remove from heat and stir in cheeses until melted.

Finish preparing the dish, and spoon the cheese sauce over potatoes. Place the casserole dish on a baking sheet and cover casserole with aluminum foil that has been sprayed with cooking spray and bake. Lastly, remove the foil and continue baking until potatoes are tender and cheese is browned and bubbly.

What To Serve With Au Gratin Potatoes

When it comes to a classic staple like these au gratin potatoes, you can serve them up with just about anything you like. I think that pair perfectly with just about any thanksgiving dish, making them a great alternative to the typical mashed potatoes and gravy.  

You don’t just have to save this recipe for holidays though, it’s great served for weeknight dinner along with lemon rosemary grilled chicken, and a simple Italian salad.

Potatoes au gratin in a red dish with a wooden spoon

Tips For Making Perfect Au Gratin Potatoes

  • Pick the right potatoes: For best results, you’ll want to use Yukon gold potatoes. Russet potatoes are still fine to use, but they may become a tad mushy during the baking process. 
  • Use a potato slicer: To be sure all your potatoes are the same size slices, pick up a slicer and you will have perfectly sliced potatoes in a fraction of the time. 
  • Prepare the potatoes in advance: To ease some of the prep and baking stress, prepare all of the ingredients the night before, cover with tinfoil and refrigerate overnight. Return to room temperature before baking. 

How Do I Store Au Gratin Potatoes? 

To store your leftovers ( if you manage to make it out with any) it’s pretty simple. Either cover your casserole dish with foil, and place it into the refrigerator, or scoop the leftovers into an airtight container and place that into the refrigerator.

You can also store the leftover potatoes in the freezer, if say, want to save half a batch for another occasion. Just make sure the potatoes are completely cooled, and place them into an airtight container before storing in the freezer. 

How Long Do Au Gratin Potatoes Keep?

The au gratin potatoes will last about 3-4 days in the refrigerator when properly stored and they will last in the freezer for up to 4 months. 

Potatoes au gratin on a white plate with a fork

Be Sure To Check Out More Crowd-Pleasing Side Dish Recipes

Sauteed Green Beans With Bacon – Made with bacon, garlic, and fresh green beans for the perfect side dish and is ready in under 15 minutes! Great compliment for a weeknight dinner at home or a holiday meal.

Pecan Pie Glazed Carrots – A dish with a festive holiday feel, making it ideal alongside roasted turkey or glazed ham. Brown sugar and maple-glazed carrots have a nice crunch from the cinnamon toasted pecans, making them sweet as pie.

Acorn Squash Mashed Potatoes – Nutty acorn squash and buttery Yukon gold potatoes are mashed to creamy perfection. The result is a festive, flavorful side dish everyone will love.

Maple Braised Butternut Squash – A side dish that will cozy up just about any meal.  Butternut squash is braised with turkey broth, butter, and maple syrup and seasoned with fresh thyme for the ultimate fall side dish. 

Easy Baked Parmesan Risotto – This oven-baked version of the favorite Italian rice dish requires hardly any stirring making it convenient enough for any night of the week. Serve as a side or entree. Either way, the whole family is going to fall in love with this recipe.

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Tools Used To Make These Easy Au Gratin Potatoes

Vegetable Slicer

This easy to use slicer is a lifesaver when you need to slice a large number of ingredients. It gets the job done efficiently, saving you time and hassle.

Saute Pan

My non-stick saute pan is my most used of all my pots and pans, and I can’t recommend it enough. You can use it for just about anything!

Rectangle Casserole Dish

A rectangle casserole dish is a necessity in the kitchen, I can’t get through a single holiday season without breaking it out last least a dozen times. 

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Potatoes au gratin in a red casserole dish

Au Gratin Potatoes

Yield: 8-10 servings
Prep Time: 20 minutes
Cook Time: 1 hour 30 minutes
Total Time: 1 hour 50 minutes

Potatoes au gratin is a casserole recipe with layers of thinly sliced spuds baked in a cheesy cream sauce.


  • 6 medium potatoes, thinly sliced
  • 1 cup diced onion (I use frozen)
  • 3 tablespoons butter
  • 1 tablespoon minced garlic
  • 3 tablespoons flour
  • 1 teaspoon dry mustard
  • 2 cups evaporated milk
  • 1 cup sharp cheddar cheese
  • 1/2 cup gruyere cheese
  • 1 teaspoon salt
  • 1/2 teaspoon paprika
  • 1/8 teaspoon ground pepper


  1. Preheat oven to 400° F and spray a 9x13 casserole dish with no-stick spray.
  2. Layer potato slices in overlapping rows in the prepared casserole dish.
  3. Melt butter in a large saute pan over medium-low heat. Add garlic and onions, saute until fragrant, 2 minutes. Add flour, whisk to combine, stir and cook for 2 minutes. Add seasonings and milk and whisk over medium heat until thick and bubbly. Remove from heat and stir in cheeses until melted.
  4. Spoon cheese sauce over potatoes. Place dish on baking sheet and cover casserole with aluminum foil that has been sprayed with cooking spray and bake for 1 hour. Remove foil and continue baking until potatoes are tender and cheese is browned and bubbly, 20 to 25 minutes.

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Nutrition Information:
Yield: 10 Serving Size: 1
Amount Per Serving: Calories: 333Total Fat: 17gSaturated Fat: 10gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 53mgSodium: 493mgCarbohydrates: 32gFiber: 3gSugar: 7gProtein: 14g

Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin, and freshness of ingredients used.

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cheese potatoes in a red pan and a wooden spoon