Potato Gratin

Potato Gratin is one of my favorite sides for any meal and would be an excellent side or holiday dinners! Layers of creamy potatoes and lots of melty cheese in this irresistible casserole!

Potato Gratin is made in a shallow dish with thin slices of potatoes cooked in a creamy sauce and topped with cheese that gets all crispy and browned when baked.

A must-have side dish for entertaining guests or special occasions. We love it paired with Easy Marinated Pork Chops or Grilled Steaks. It’s also a staple with our favorite Peach and Ginger Glazed Ham.

Just take me to the Potato Gratin Recipe:

If you are just looking for the recipe, scroll on down to the very bottom where you will find the easy printable recipe card. Otherwise read on for my step by step instructions, plus tips and tricks for this easy side dish.

How to Make Potato Gratin:

1. Slice potatoes thin using a mandoline and set aside.
2. Sauté half of a diced onion and minced garlic in butter until translucent. Whisk in flour and salt and cook about 2 minutes.
3. Whisk in milk, broth and heavy cream. Continue to cook, whisking constantly until thickened. Remove from heat.
4. Alternate layers of potatoes, cream sauce and shredded cheese into a shallow dish, ending with cheese.
5. Bake potato casserole about 1 hour 25 minutes or until potatoes are tender and top is starting to brown.
6. Garnish with fresh herbs such as thyme. Allow to rest 15 minutes before serving.

The key to a delicious Potato Gratin is to give it plenty of time to cook and it’s best if it has time to rest before serving.

I am so looking forward to Thanksgiving this year.  I plan to actually take the day off and enjoy the time with my family.

I hope y’all have a wonderful Thanksgiving with lots of delicious food and good times with your family and friends!

More Side Dish Recipes to Try:

Cheesy Hashbrown Casserole goes with any meal of the day and it’s a favorite for the holidays.

Creamy Coleslaw is a great addition to just about every meal. This slaw is flavorful and delicious. Easy to make ahead of your dinner.

Creamy Dill Potato Salad is a favorite for cookouts and holiday dinners. Made with red potatoes and a super simple dill dressing.

Roasted Garlic Asparagus with Lemon Sauce is a fantastic vegetable dish to add to any holiday dinner.

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Helpful Tools for Potato Gratin:

• Fiesta Pie Plate
• Oxo Mandoline
• Box Grater
• Flat Whisk

If you love this Recipe as much as I do, please leave a comment and a five star review, and be sure to help me share on Pinterest!

Print Recipe

4.70 from 10 votes

Potato Gratin

Prep Time20 minutes mins

Cook Time1 hour hr 15 minutes mins

Total Time1 hour hr 35 minutes mins

Servings: 5 -6

Author: Milisa

Ingredients

• 6-7 medium potatoes washed, peeled and thinly sliced
• 3 tablespoons butter
• 1/2 large onion diced
• 1 teaspoon minced garlic
• 1 teaspoon kosher salt
• 3 tablespoons all purpose flour
• 1 cup milk
• 1/2 cup heavy cream
• 1/2 cup broth
• 1 cup grated Swiss cheese
• 1 cup grated Dubliner cheese or white cheddar
• fresh thyme for garnish

Instructions

• Preheat oven to 375 degrees.
• Grease a baking dish and set aside. (I used a deep pie dish)
• Add butter to a saucepan and add onions and garlic. Place over medium heat and cook, stirring often until onions are translucent. Add flour and salt and whisk together, cooking for about 2 minutes. Add milk, cream and broth and continue whisking until sauce thickens. Remove from heat.
• Add a layer of potato slices to cover bottom of dish. Pour about 1/3 of sauce over potatoes and spread evenly.
• Mix the shredded cheese together. Sprinkle about 1/3 of cheese over sauce. Continue layering ending with cheese.
• Bake for 1 hour 15 minutes to 1 hour 25 minutes or until potatoes are cooked through. Garnish with fresh thyme.
• Allow potato gratin to set 15 minutes before serving.
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