Cheesy Au Gratin Potatoes

This easy Cheesy Au Gratin Potatoes recipe is made with russet potatoes, cheese, milk, butter and onion. They’re loaded with flavor and deliciously cheesy.

Our Cheesy Au Gratin Potatoes make a delicious side dish to serve with just about anything you want. It’s easy enough to make on weeknights or for Sunday dinners with the family, and they’re also great for holiday meals and special occasions.

Why We Love This Recipe

• Flavor. These au gratin potatoes are rich, cheesy and loaded with flavor.  
• Quick and Easy. This is a recipe that our family has made for as long as I can remember. It’s a simple side dish that comes together in a pinch.
• Budget Friendly. These au gratin potatoes are made with simple ingredients that I’m betting you may already have on hand.

Cheesy Au Gratin Potatoes Recipe Ingredients

• Russet Potatoes. We use russet potatoes for this recipe. 
• Onion. Thin slices of yellow onion adds a lot of flavor to these potatoes.
• Cheese We use both extra sharp and Jack cheese.
• Milk. We use whole milk.
• Butter. You’ll need a little unsalted butter to dab throughout the potatoes.
• Seasoning. We use just a little salt and black pepper for seasoning.

Find printable recipe with the measurements below.

Variations

• Add 1-2 cloves minced garlic to the milk and warm it over the stove to infuse the garlic flavor into the milk before pouring it over the potatoes.
• Slice about 4-6 turkey hot dogs and layer them in with the potatoes before you bake them for a quick and easy kid-friendly meal. It’s SO good!

How To Make Easy Au Gratin Potatoes

• Preheat Oven. Preheat oven to 350°F.
• Slice Potatoes. Peel the potatoes. You can use a mandoline if you like, but we use the wide grate on a box grater to slice the potatoes. This method slices the potatoes very thin so they cook quicker.
• Grate Cheese. Grate the cheese and set aside.
• Slice Onion. Slice the onion very thin and set aside.
• Layer Potato Bake. Spread 1/3 of the potatoes on the bottom of the baking dish. Add a few dabs of butter over the potatoes, sesason with salt and pepper, then sprinkle some sliced onion over the potatoes, and then sprinkle cheese over the onions. Repeat layering with potatoes, salt and pepper, dabs of butter, sliced onion and cheese. You should end with a top layer of sliced potatoes. Season them with salt and pepper and add dabs of butter to the top.  
• Add Milk. Pour the milk over the potatoes and sprinkle the top of the potatoes with the remaining cheese.
• Bake Potatoes. Cover the baking dish with foil and transfer the baking dish to the oven and bake for 45 minutes. Remove the foil and bake for another 15-20 minutes or until the potatoes are fork tender and the cheese is melted and golden on top.

Storing And Reheating Leftovers

• Store leftovers in an airtight container in the refrigerator. If properly stored, it should last up to 5 days.
• To reheat, add 1-2 tablespoons butter or milk to a skillet and reheat the potatoes on low heat until warmed through. You can also reheat them in a preheated oven at 350°F for 10-15 minutes.

What To Serve With Au Gratin Potatoes

• Air Fryer Chicken Thighs
• Baked BBQ Chicken Thighs
• Grilled Lemon Chicken Thighs
• Baked Boneless Chicken Thighs

More Potato Side Dish Recipes

• Garlic Parmesan Mashed Potatoes
• Parsley Potatoes Recipe
• Make Ahead Mashed Potatoes
• Boursin Mashed Potatoes
• Basil Mashed Sweet Potatoes
• Mashed Sweet Potatoes 
• Coconut Curry Scalloped Sweet Potatoes

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Yield: 8 Servings

Cheesy Au Gratin Potatoes

Prep Time 10 minutes

Cook Time 1 hour

Additional Time 5 minutes

Total Time 1 hour 15 minutes

This Cheesy Au Gratin Potatoes recipe is made with russet potatoes, cheese, milk, butter and onion. They're loaded with flavor and deliciously cheesy, and you'll want to serve them with just about everything.  

Ingredients

• 2-1/2 pounds russet potatoes, grated on the wide grate on a box grater
• 1 small yellow onion, cut in half or quarters and sliced thin
• 6 tablespoons unsalted butter, diced
• 2 cups whole milk
• 1-1/2 cups cheddar cheese, grated
• 1/3 cup Monterey Jack cheese, grated
• 1 teaspoon sea salt
• 1/2 teaspoon black pepper

Instructions

1. Preheat Oven. Preheat oven to 350°F. Grease a 9x13 baking dish. Spread 1/3 of the potatoes on the bottom of the baking dish. Add a few dabs of butter over the potatoes, season with salt and pepper. Sprinkle 1/3 of the sliced onions over the potatoes, and then sprinkle 1/3 of the grated cheese over the onions. Repeat layering with 1/3 of the potatoes, salt and pepper, dabs of butter, the remaining sliced onion and 1/3 of the grated cheese. You should end with a top layer of sliced potatoes. Season them with salt and pepper and add dabs of butter to the top.  
2. Pour the milk over the potatoes until the milk is level with the top layer of potatoes.
3. Cover the baking dish with foil and transfer the baking dish to the oven and bake for 40 minutes. Remove the foil and sprinkle the remaining cheese over the top of the potatoes and return to the oven uncovered. Bake for another 15-25 minutes or until the potatoes are fork tender and the cheese is melted and golden on top.

Nutrition Information:

Yield:

8

Serving Size:

1
Amount Per Serving: Calories: 142Total Fat: 12gSaturated Fat: 8gUnsaturated Fat: 5gCholesterol: 33mgSodium: 358mgCarbohydrates: 4gFiber: 0gSugar: 4gProtein: 4g

theharvestkitchen.com attempts to provide accurate information, however, this nutritional information is provided as a courtesy and is an estimate only. The nutritional information provided comes from online sources and calculations. See full disclaimer on About page.