Perfect Potatoes Au Gratin

5 from 6 votes
Jump to Recipe

This post may contain affiliate links. Please see my disclosure policy

Potatoes Au Gratin – thinly sliced potatoes layered with a deliciously thick cream sauce and topped with cheddar cheese.  Such a great side dish for any type of meal and so much easier to make than you think!  

Cheesy potatoes are one of those foods that everyone loves.  It doesn’t matter what form they are in, when you say that is what is for dinner people get excited.  Loaded Twice Baked Potato Casserole is a version that has mashed potatoes with cheese and bacon and is over the top amazing.  These Au Gratin Potatoes are thinly sliced and then topped with cheese that gets all melty and delicious. 

Cheesy Au Gratin Potatoes are a great holiday side dish


I love this potatoes au gratin recipe because of how simple it is.  It really is just a few ingredients and not much work.  The hardest part is slicing the potatoes.  If you have a mandoline this is the time to break it out!  You want the potatoes sliced as close to the same thickness as possible, so they cook at the same rate. 

Scalloped Potatoes vs Au Gratin Potatoes

This is the big question that gets asked every time one of these recipes is made.  The main difference comes down to the cheese.  Scalloped potatoes are cooked in a very similar cream sauce they are just not topped with cheese.  Au Gratin Potatoes always have melted cheese on top.  Both use thinly sliced potatoes that are arranged in a casserole dish and baked until soft and tender.  

Nothing beats cheesy potatoes and these potatoes au gratin are the perfect side dish

The Best Potatoes for Potatoes Au Gratin

Russet potatoes are my favorite to use.  They contain the most starch, so as they cook down it makes for the creamiest sauce.  You can use red potatoes as well if you have them, but russets are my favorite. 

How to Make Potatoes Au Gratin

  1. Thinly slice the potatoes.  This is the time to break out your mandoline slicer.  If you don’t have one, you can get a relatively inexpensive one for under $20 at Amazon.  Trust me, it is worth the investment even if you only break it out a couple times a year.  
  2. Arrange the potatoes in a casserole dish.  You don’t want to just stack them tall, you want to have space between them and make them somewhat pretty.  In addition to appearance, it allow the sauce to get into all the open areas and really cover the potatoes. 
  3. Cover with the delicious cream sauce.  You just pour over the potatoes trying to make sure that everything is covered. 
  4. Bake – these do take awhile to bake.  I start with them covered so that potatoes can actually cook without burning.  Then cover with cheese to finish baking.
Cheesy, creamy and delicious! Au Gratin Potatoes are way easier to make than you think and a great additional to almost any meal.

Homemade au gratin potatoes are so much easier to make than they appear.  They are perfect for your next holiday meal or even Sunday dinner.  They do take awhile to bake, but really most of the time involved is hands off. These are perfect to make if you have leftover ham from the holiday, just mix it in when you layer the potatoes and it will blend with everything and be absolutely delicious!  

What to Serve with Potatoes Au Gratin

Potatoes Au Gratin - thinly sliced potatoes layered with a deliciously thick cream sauce and topped with cheddar cheese.  Such a great side dish for any type of meal and so much easier to make than you think!  

More Great Potato Side Dish Recipes

A bowl of cheesy potatoes, with Dinner and Gratin
5 from 6 votes

Perfect Potatoes Au Gratin

By Erin
Potatoes Au Gratin – thinly sliced potatoes layered with a deliciously thick cream sauce and topped with cheddar cheese.  Such a great side dish for any type of meal and so much easier to make than you think!  
Prep: 10 minutes
Cook: 1 hour
Total: 1 hour 10 minutes
Servings: 8


  • 1 Tablespoon unsalted butter, diced into small pieces
  • 4 medium russet potatoes
  • 1 cup heavy cream
  • 1 cup milk
  • 2 Tablespoons all-purpose flour
  • 3 garlic cloves, minced
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 3/4 cup sharp cheddar cheese, shredded
  • 2 green onions, thinly sliced


  • Preheat the oven to 400º F. Spray a large baking dish with non stick spray.
  • Thinly slick potatoes, and arrange in the bottom of the baking dish. Best to use a mandolin to get even slices.
  • In a liquid measuring cup combine milk and cream. Whisk in flour, garlic, salt and pepper.
  • Pour over potatoes. Spread diced butter over the top of the mixture.
  • Cover, and bake for 60 minutes. Uncover, and bake for 20 more minutes.
  • Sprinkle with cheese, and return to oven until the cheese is melted.
  • Garnish with green onions to serve.


Adapted from The Pioneer Woman


Serving: 1g | Calories: 418kcal | Carbohydrates: 46g | Protein: 13g | Fat: 20g | Saturated Fat: 12g | Polyunsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 61mg | Sodium: 477mg | Fiber: 3g | Sugar: 2g

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Author: Erin
Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes
Course: Side Dish Recipes
Cuisine: American
Servings: 8
Calories: 418
Like this recipe? Leave a comment below!

I created a fun group on Facebook,and I would love for you to join us! It’s a place where you can
share YOUR favorite recipes, ask questions, and see what’s new at Dinners, Dishes and Desserts (so that you never miss a new recipe)!

Be sure to follow me on Instagram and
tag #dinnersdishes so I can see all the wonderful DINNERS, DISHES, AND DESSERTS
recipes YOU make!

Be sure to follow me on my social media, so you
never miss a post!

Facebook | Twitter | Pinterest | Instagram 

Did you know there is a Dinners,
Dishes, and Desserts SHOP
? Lots of different E-Books for sale. Or you can buy me a
to say thanks!


About Erin S

Welcome to Dinners, Dishes, & Desserts where my love of food meets my busy life. My name is Erin and I’m a casual home cook who loves to feed people. On this blog, you’ll find hundreds of quick and easy recipes made mostly from scratch. My days are spent in the kitchen, creating new recipes to share with family and friends.

Other Recipes You Might Like:

Leave a comment

Your email address will not be published. Required fields are marked *

Recipe Rating

This site uses Akismet to reduce spam. Learn how your comment data is processed.


  1. I LOVE potatoes au gratin! And I love that you lightened yours up a little – makes them seem totally do-able for any time, not just special occasions!

  2. I love potatoes au gratin. These look wonderful and will be making their way on my dinner table soon!!

  3. I think I saw this post over at Crunchy Creamy Sweet for Pass the Cook Book club! So yummy and tasty! I’m ga-ga over potatoes au gratin. Actually, any au gratin works too!

  4. I love au gratin potatoes, Erin. These look so good. Nothing like some classic comfort food potaotes!

  5. I love potatoes au gratin so this is a great choice! These look creamy, cheesy, and delicious!

  6. Love how you modified it…thats what I would do..just use what I have on hand. It looks amazing and delicious!