Dad’s Creamy & Cheesy Au Gratin Potatoes


When I was growing up holidays were made incredibly special thanks to my Dad’s family; they had the best get togethers which included a massive array of food and I was always excited to get on my best dress and make an appearance.

Typically at these big gatherings with filled with laughter, you’d find my aunt cooking both ham and turkey (try my delicious turkey recipe!), creamy mashed potatoes sprinkled with paprika, green bean casserole, at least 4 different kinds of pies from Baker’s Square (ha!), and of course, my Dad’s cheesy, creamy au gratin potatoes filled with layers of thinly sliced potatoes, cheese, onions and a crispy cheesy topping. Always, always one of my favorite things to go overboard and load up on during the holidays!

Today I’m sharing the recipe inspired by my Dad, who passed away just over 13 years ago. He was the best cook, and I know his love of food needs to be shared with all of you. I hope you make these — we love them for Thanksgiving, but they’re also perfect for Sunday dinners with roasted chicken or my maple glazed salmon. Pure nostalgic love in this pan of creamy, cheesy potatoes.

cheesy au gratin potatoes in a baking dish with a spoon

Ingredients in au gratin potatoes

This cheesy au gratin potatoes recipe uses super simple ingredients and is easy to customize with your favorite cheeses. Here’s what you’ll need:

  • Yukon gold potatoes: the base of these au gratin potatoes is of course, potatoes! I like to use yukon gold potatoes in this recipe for the best buttery flavor.
  • Onion: we’re adding a little savory element to these au gratin potatoes with sliced onion. the onion gets delicious and slightly caramelized while the potatoes bake. Plus the cheese sauce infuses with incredible onion flavor.
  • For the cheese sauce: you’ll make a cheese sauce using salted butter, all purpose flour (whole wheat, all purpose, or gluten free 1:1 flour will all work), unsweetened almond milk (regular, skim or whole milk will also work) and sharp cheddar cheese, gruyere cheese & grated parmesan cheese. Very important to use sharp cheddar cheese for optimal flavor.
  • To season: you’ll add garlic powder, salt & black pepper to the cheese sauce to give it the perfect flavor.
  • For topping: add a little fresh chopped parsley for a hint of green on top!

sliced potatoes in a baking dish

What’s the difference between scalloped and au gratin potatoes?

Au gratin potatoes usually have cheese sauce between each layer of thinly sliced potatoes and breadcrumbs on top. Scalloped potatoes often use a cream sauce made of butter & broth and sliced potatoes. Truth be told, it doesn’t really matter what you call them!

In this au gratin potatoes recipe we’re skipping the breadcrumbs, adding some savory onions and making them extra cheesy with three types of cheese.

pouring cheese sauce onto unbaked au gratin potatoes

How to make au gratin potatoes

  1. Preheat the oven to 375 degrees F. Spray a 2 quart square baking dish (or an 8×12 is good) with nonstick cooking spray or grease with butter or oil.
  2. Place sliced potatoes in three tight slanted rows as indicated in the photos. You don’t want them to be overly tight, make sure you leave enough space so the sweet potato slices are slightly slanted. Add in onion slices in between the rows and on top of potatoes. Basically wherever you can fit them.
  3. Next make your sauce: add in 2 tablespoons of butter and place over medium heat. Once butter is melted, whisk in a little bit of the flour and then slowly add in milk, a little bit at a time, alternating with the flour and vigorously whisking away any lumps. Bring mixture to a simmer; it should be a similar consistency to creamy gravy.
  4. Turn heat to low and stir in shredded cheddar cheese, garlic powder, salt and pepper. Taste and add more salt and pepper, if necessary.
  5. Pour the sauce evenly over the potatoes and onions to cover them. Don’t worry, the sauce will get nice and creamy while baking. 
  6. Cover the pan with foil, then bake for 45 minutes. 
  7. After 45 minutes, remove foil, sprinkle top of potatoes with 1/2 cup shredded gruyere (or more cheddar) and ¼ cup parmesan. Return to the oven and bake for 30-45 more minutes or until potatoes are done and nice and golden brown on top. (Potatoes are done when the middle of the potatoes can be easily pierced with a fork.) Remove from the oven and garnish with fresh chopped parsley. Enjoy!

creamy au gratin potatoes in a baking dish

Customize your au gratin potatoes

  • Add bacon or ham. You read that right! Make them super savory and delicious by adding 6-8 ounces of cooked, chopped bacon or ham to the cheese sauce or onto the potatoes before pouring the sauce.
  • Switch up your cheeses. No stress if you don’t have gruyere, feel free to add extra cheddar or even mix it up with a smoky gouda or even a spicy cheese.
  • Add breadcrumbs. If you want a little crunchy topping, add some breadcrumbs or even crushed up Ritz crackers to the top after pouring the cheese sauce.

easy au gratin potatoes in a baking dish with a spoon

Can au gratin potatoes be made ahead of time?

You can absolutely make these cheesy au gratin potatoes up to three days ahead of time! Simply pour the sauce over the potatoes as directed, then cover the pan with foil and instead of baking, place in the fridge until ready to bake. They may take a bit longer, likely 15 minutes, to bake as the sauce will be cold.

spoon lifting up a scoop of au gratin potatoes from a baking dish

How to store au gratin potatoes

To store: simply store these au gratin potatoes in the refrigerator in individual, airtight containers or covering the entire pan and placing it in the refrigerator. They’ll stay good for up to 5 days.

To reheat: reheat individual portions in the microwave or place the pan back in the oven until heated through.

homemade potatoes au gratin in a baking dish with a spoon

What to pair with au gratin potatoes

Check out all of my Thanksgiving recipes here, plus a few suggestions on what to pair these au gratin potatoes with:

Lightened Up Brown Butter Mashed Sweet Potatoes (with a slow cooker option!)

The Best Cornbread Stuffing Ever (gluten free!)

Cheddar Broccoli Cauliflower Gratin

Lightened Up Healthy Sweet Potato Casserole with Pecan Oat Streusel

The Best Homemade Healthy Green Bean Casserole

See how to make the au gratin potatoes

I hope you love my dad’s cheesy, creamy au gratin potatoes! If you make them be sure to leave a comment and a rating so I know how you liked them. Enjoy, xo!

Dad’s Creamy & Cheesy Au Gratin Potatoes

Cook Time 1 hour 15 minutes

Total Time 1 hour 45 minutes

Cheesy, creamy au gratin potatoes made with three types of cheese for an incredible side dish everyone will love! My dad’s famous au gratin potatoes recipe is easy to make and filled with cheesy goodness in every bite. Perfect for holidays or anytime you need a delicious side!

  • 6-7
    medium yukon gold potatoes, thinly sliced into 1/8th inch rounds (3 pounds gold potatoes — by weight is a more accurate measure)
  • ½
    white or yellow onion, cut into slices
  • For the sauce:
  • 2
    tablespoons
    salted butter
  • ¼
    cup
    all purpose flour (whole wheat, all purpose, or gluten free 1:1 flour will all work)
  • 1 1/2
    cups
    unsweetened almond milk (regular, skim or whole milk will also work)
  • 8
    ounces
    sharp cheddar cheese (2 heaping cups shredded cheddar cheese)
  • ½
    teaspoon
    garlic powder
  • ¾
    teaspoon
    salt, plus more to taste
  • Freshly ground black pepper
  • For topping:
  • 1/2
    cup
    gruyere cheese (or sub more sharp cheddar)
  • ¼
    cup
    grated parmesan
  • To garnish:
  • Fresh chopped parsley
  1. Preheat the oven to 375 degrees F. Spray a 2 quart square baking dish (or an 8×12 is good) with nonstick cooking spray or grease with butter or oil.

  2. Place sliced potatoes in three tight slanted rows as indicated in the photos. You don’t want them to be overly tight, make sure you leave enough space so the sweet potato slices are slightly slanted. Add in onion slices in between the rows and on top of potatoes. Basically wherever you can fit them.

  3. Next make your sauce: add in 2 tablespoons of butter and place over medium heat. Once butter is melted, whisk in a little bit of the flour and then slowly add in milk, a little bit at a time, alternating with the flour and vigorously whisking away any lumps. Bring mixture to a simmer; it should be a similar consistency to creamy gravy.

  4. Turn heat to low and stir in shredded cheddar cheese, garlic powder, salt and pepper. Taste and add more salt and pepper, if necessary.

  5. Pour the sauce evenly over the potatoes and onions to cover them. Don’t worry, the sauce will get nice and creamy while baking.

  6. Cover the pan with foil, then bake for 45 minutes.

  7. After 45 minutes, remove foil, sprinkle top of potatoes with 1/2 cup shredded gruyere (or more cheddar) and ¼ cup parmesan. Return to the oven and bake for 30-45 more minutes or until potatoes are done and nice and golden brown on top. (Potatoes are done when the middle of the potatoes can be easily pierced with a fork.) Remove from the oven and garnish with fresh chopped parsley. Enjoy!

This recipe would be delicious with bacon. If you’d like, you can feel free to add in 8 ounces of chopped cooked bacon over the potatoes before adding the cheese sauce. Or just stir the chopped bacon into the cheese sauce. Mmmm!

To make ahead: feel free to make these potatoes up to three days ahead of time! Simply pour the sauce over the potatoes as directed, then cover the pan with foil and instead of baking, place in the fridge until ready to bake. They may take a bit longer, likely 15 minutes, to bake as the sauce will be cold.

To store: simply store these au gratin potatoes in the refrigerator in individual, airtight containers or covering the entire pan and placing it in the refrigerator. They’ll stay good for up to 5 days.

To reheat: reheat individual portions in the microwave or place the pan back in the oven until heated through.

Nutrition

Servings: 8 servings

Serving size: 1 serving (based on 8)

Calories: 256kcal

Fat: 12.6g

Saturated fat: 7.3g

Carbohydrates: 24g

Fiber: 3.5g

Sugar: 1.6g

Protein: 13.2g

Recipe by: Monique Volz // Ambitious Kitchen | Photography by: Eat Love Eats



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