Potato Gratin or Potato au Gratin is a hearty potato side dish that will complement many dishes from chicken to beef. What I like about this Potato Gratin recipe is it’s easy to make and quick enough that you can cook it for busy weeknight dinners. My kids love Potato Gratin. They love the cheesy, potato casserole- who doesn’t right? I serve Potato Gratin every few weeks, it’s a staple side dish in my menu planning.

Potato Gratin can also be easily elevated and served as a side dish for fancy dinner parties and milestone dinners such as birthday dinners and anniversary dinners at home. You can add truffle oil to Potato Gratin to elevate it. Or serve it in individual casseroles to up the food presentation.

Potato Gratin Recipe

Below is the recipe for my Potato Gratin. I also made a video below that you can watch if you prefer it over reading the recipe. 

Potato Gratin Video

Ingredients:

1 lb. Potatoes

1 cup Heavy Cream

1 tsp. Garlic Powder

Salt

1 TB Butter (room temperature)

Grated Parmesan Cheese or Gruyere Cheese

Instructions:

1. Preheat oven to 375 F (191 C). 

2. Peel and slice potatoes

3. Smear butter all over the inside of your baking dish. Make sure your butter is at least room temperature or warmer (you can zap it in the microwave for a few seconds to warm up).

4. Add the heavy cream, garlic powder, and salt to the baking dish. Mix well.

5. Arrange the potato slices in the baking dish or if you are lazy, just dump it in the baking dish, it will still taste delicious!

6. Mix the heavy cream and potato slices. Make sure all potato slices are coated with heavy cream.

7. Top the potato slices with grated parmesan cheese or gruyere cheese. If you don’t have that, you can use any shredded cheese you like.

8. Bake in the oven for approximately 30 minutes. Keep an eye on it, the key is to get the cheese bubbly and brown. 

9. Remove from the oven. Serve and enjoy. 

What Type of Potato Should You Use for Potato au Gratin?

You can use Yukon Gold or Russet potatoes for Potato au Gratin. Both will keep their shape and absorb the creamy flavor well. However, if you don’t have Yukon Gold or Russet potatoes, go ahead and just use what you have. You will still have delicious potato gratin.

Can You Use Milk if You don’t have Heavy Cream to Make Potato Gratin?

If you substitute the heavy cream with milk, your potato gratin will be a little bit too watery. If you don’t mind that, then it’s okay. However,  I suggest making a bechamel sauce with milk, flour, and butter. The bechamel sauce will give you the same creamy consistency as heavy cream. Check out my bechamel sauce recipe. 

Can You Keep Leftover Potato Au Gratin?

Yes, you can keep leftover Potato au Gratin. Store it in the fridge for up to 5 days. Potato Gratin is an easy make-ahead casserole that you can have for weeknight dinners. 

What’s the Best Way to Heat Up Leftover Potato Au Gratin?

The easiest way to reheat leftover potato au gratin is to use the microwave oven. Depending on the quantity 1 or 2 minutes in the microwave is sufficient to heat up leftover potato au gratin.

Try my other Pasta Dishes

Authentic Spaghetti Bolognese (no bottled pasta sauce)

Parmesan Chicken Pasta (no bottled pasta sauce)

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