Ingredients:
- Potatoes: 2 pounds, peeled and sliced thinly
- Butter: 2 tablespoons, softened
- All-purpose flour: 2 tablespoons
- Milk: 2 cups, warmed
- Heavy cream: 1 cup
- Gruyère cheese: 1 cup, grated
- Parmesan cheese: 1/2 cup, grated
- Garlic powder: 1/2 teaspoon
- Onion powder: 1/4 teaspoon
- Salt: 1/2 teaspoon
- Black pepper: 1/4 teaspoon
- Nutmeg: 1/4 teaspoon
Instructions:
- Preheat oven: to 375°F (190°C).
- Butter the dish: Grease a 9×13 inch baking dish with butter.
- Layer potatoes: Arrange a layer of potato slices in the bottom of the baking dish.
- Make the sauce: In a saucepan, melt the butter over medium heat. Whisk in the flour until smooth. Gradually whisk in the warm milk and heavy cream until the sauce thickens. Stir in the Gruyère cheese, Parmesan cheese, garlic powder, onion powder, salt, pepper, and nutmeg.
- Pour sauce: Pour the cheese sauce over the potatoes.
- Repeat layers: Repeat the layers of potatoes and cheese sauce until all the ingredients are used, ending with a layer of cheese sauce.
- Bake: Bake in the preheated oven for 45-50 minutes, or until the potatoes are tender and the top is golden brown.
- Broil (optional): For a more crispy top, broil for a few minutes until golden brown.
- Serve: Let cool for a few minutes before serving.
Enjoy your creamy, cheesy, and delicious Au Gratin Potatoes!