Home>Side Dishes>Potatoes Au Gratin>Parmesan-Crusted Au Gratin Potatoes and Onion

Parmesan-Crusted Au Gratin Potatoes and Onion

Parmesan-Crusted Au Gratin Potatoes and Onion is a delicious and indulgent side dish that is perfect for any special occasion or holiday dinner. This dish takes classic au gratin potatoes to the next level by adding a crispy Parmesan crust on top, which adds a delightful texture and flavor to the creamy and cheesy potatoes underneath. The addition of sweet and caramelized onions further enhances the overall flavor profile, making this dish a standout addition to any meal.

Prep Time:

25 mins

Cook Time:

50 mins

Total Time:

1 hr 15 mins

Servings:

Yield:

10 servings

Ingredients

4 pounds russet potatoes, cut into 1/4-inch slices

salt and ground black pepper to taste

6 tablespoons butter

6 tablespoons all-purpose flour

1 ½ cups whole milk

1 cup heavy whipping cream

2 ½ cups shredded mild Cheddar cheese

1 cup shredded Asiago cheese

1 sweet onion, sliced into rings

¾ cup sliced green onions

⅓ cup shaved Parmesan cheese

7 buttery round crackers (such as Ritz®), crushed

2 tablespoons chopped fresh parsley

Directions

Step 1

Place potatoes into a large pot and cover with water; add salt and bring to a boil. Reduce heat to medium-low and simmer until just beginning to soften, 15 to 20 minutes; drain.

Step 2

Melt butter in a saucepan over medium heat; add flour and whisk until the mixture thickens, 1 to 2 minutes. Pour milk and heavy cream into the saucepan; cook and stir until smooth, 2 to 3 minutes. Melt Cheddar and Asiago cheese into the butter mixture; cook while stirring continually until the mixture is smooth and creamy, 1 to 2 minutes. Season the sauce with salt and pepper.

Step 3

Preheat oven to 400 degrees F (200 degrees C). Butter a 9x13-inch casserole dish.

Step 4

Layer about half the sliced potatoes into the bottom of the baking dish. Top the potatoes with sweet onion slices and green onions; pour about 1/3 of the cheese sauce over the onions. Arrange the remaining potato slices into the dish; pour remaining cheese sauce over the potatoes. Sprinkle Parmesan cheese and crushed crackers over the top.

Step 5

Bake in the preheated oven until hot in the center and beginning to brown at the edge, about 30 minutes. Sprinkle parsley over the top of the dish to serve.

Nutrition Facts (per serving)

507

Calories

31g

Fat

42g

Carbs

17g

Protein

Complement

The creamy and tender potatoes are layered with a rich and savory cheese sauce, then baked until bubbly and golden brown. The addition of Parmesan on top creates a crispy and flavorful crust that adds a satisfying crunch to every bite. The caramelized onions bring a touch of sweetness and depth of flavor that perfectly complements the richness of the potatoes and cheese. This Parmesan-Crusted Au Gratin Potatoes and Onion dish is sure to be a crowd-pleaser and will elevate any meal to a new level of deliciousness.