Potato Au Gratin

Potato Au Gratin

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Adjust Servings:
1 large Yam (Sweet Potato)
3 regular Yukon Gold Potatoes
1.5 cups Heavy Cream
1 cup, grated Gruyere Cheese
1 Egg
0.5 teaspoon Nutmeg
2 cloves, minced Garlic
2 teaspoon Kosher Salt
1 teaspoon Ground Black Pepper
6 Sprigs of Thyme

Potato Au Gratin

  • 90 minutes
  • Serves 6
  • Medium




Besides stuffing for the Thanksgiving holiday dinner, this potato au gratin is my second favorite side dish and a big crowd pleaser.

In fact, if I don’t bring this dish to my family’s Thanksgiving, I’m pretty sure I will be disowned. Jokes!

These cheesy potatoes also called the dauphinoise in France where it originated, is a simple and family style recipe typically made from potatoes and cream.

There are many variations, but suffice it to say you can’t do it without cream or cheese and potatoes.

Traditionally, only yellow potatoes are used but I love adding yams or sweet potatoes as well for color and a slight sweetness that goes so well with the cheesy goodness.

Gruyere cheese is the best cheese to use for this potato dish.

It is salty, slightly sweet and packed with flavor.

This dish is definitely very rich and decadent. But hey, it’s the holidays and you won’t regret making this, promise!

Watch me make this potato au gratin in the video below.



Preheat Oven & Prep The Potatoes

Preheat the oven to 350°F.

Next, wash & peel the potatoes then slice them into thin rounds and put aside.

I like using a mandolin slicer to ensure all slices are even.

If you are using a mandolin slicer, be sure to use the guard to prevent cutting your fingers off.


Grate The Cheese & Make The Cream Sauce

Using a cheese grater, grate the cheese and set aside.

In a small bowl or measuring cup, crack an egg, add the heavy cream and whisk well.

Next, add the salt, pepper, grated nutmeg and grated or crushed garlic cloves.

Whisk again.


Get Your Baking Dish

Lightly butter your oven safe dish and add one layer of the potatoes then a layer of the shredded cheese and top with some of the cream sauce.

I also like to add a bit of fresh thyme to each layer.

The leaves of 1 sprig per layer will do.

Repeat the layering process until the dish is full.

The top layer should be cheese and the remaining cream sauce.



Next, cover the dish with aluminum foil and bake for 45 minutes then remove the aluminum foil and bake for another 25-30 minutes.

The top should be golden brown and bubbly.

After removing the dish from the oven, allow it to settle and cool for at least 10 minutes before getting a big spoon and devouring these creamy potatoes!


Hi guys, so glad you are here! My food blog is about easy, colorful and mostly healthy recipes. I grew up in Germany and have been in the states since 2002. Currently, I am living in sunny Miami, FL! Please leave me a comment if you have questions or recipe requests and also follow me on social media via @foodbyjonister. Happy cooking and eating!

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