Classic Potatoes Au Gratin

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Classic Potatoes Au Gratin

This Classic Potatoes Au Gratin with White Cheddar and Parmesan is a must-try for cheese lovers and comfort food fans. With a silky homemade cheese sauce, tender potato layers, and a golden crust, it’s the kind of dish that steals the show—whether on a holiday table or alongside your favorite weeknight main.

Prep Time20

Active Time1 30

Total Time1 50

Course: Side Dish

Cuisine: American

Keyword: cheesy, comfort food, from scratch, old fashioned

Yield:

Calories: 379kcal

Author: Sweet Ordeal

Materials

2 Tbsp. unsalted butter
1 small onion, chopped
2 cloves garlic, minced
2 Tbsp. all-purpose flour
1/2 cup chicken broth low sodium
1 cup milk or half and half
1/4 tsp. salt (or more to taste)
1/4 tsp. black pepper (or more to taste)
1 1/2 lbs. Red or Yukon Gold potatoes, thinly sliced (approx. 1/8")
1 cup white cheddar cheese, freshly grated
1/4 cup Parmesan cheese, freshly grated

Instructions

Preheat oven to 350°F and lightly grease an 8 x 8" baking dish with butter or nonstick spray.
In medium sauce pan, melt butter over medium-low heat. Add onion and cook until soft and translucent, about 5 minutes. Stir in the garlic and cook for another 30 seconds, just until fragrant. Sprinkle flour over the top and whisk for 2 minutes.
Gradually add the chicken broth and milk while constantly stirring to thicken. Whisk until smooth. Bring to a boil over medium heat while whisking, season with salt and pepper.
Layers: Place 1/3 of the sliced potatoes in the bottom of the prepared dish, followed by 1/3 of the sauce and 1/3 of the cheddar cheese. Repeat layers 2 more times: potatoes, sauce, cheese. Top with Parmesan cheese. Cover with foil.
Bake for 45 minutes. Remove cover and continue baking for another 45 minutes. The top should be a golden brown and the potatoes should be fork tender. Enjoy!

Notes

Easily double recipe in a 13 x 9" baking dish.

See blog for make-ahead instructions.

Nutrition