Cheesy Potato Gratin with Creamy Layers

1. 1

   Gather all ingredients. Preheat the oven to 400 degrees F (200 degrees C). Grease a 2-quart casserole dish with butter.

2. 2

   Layer 1/2 of the potatoes in the bottom of the prepared casserole dish; season with salt and pepper.

3. 3

   Arrange the onion slices on top, then add the remaining potatoes. Season again with salt and pepper.

4. 4

   Melt butter in a medium saucepan over medium heat. Whisk in the flour and salt; cook, whisking constantly, until the raw flour taste is gone, about 1 minute.

5. 5

   Gradually pour in the milk, about 1/4 cup at a time, whisking well after each addition to incorporate; adding the milk slowly while whisking helps prevent lumps in the sauce.

6. 6

   Cook, whisking constantly, until the mixture thickens, 3 to 5 minutes.

7. 7

   Stir in the cheese all at once; cook, stirring constantly, until melted, 30 to 60 seconds.

8. 8

   Pour the cheese sauce over the potatoes, then cover the dish with aluminum foil.

9. 9

   Bake in the preheated oven until the potatoes are tender and the sauce is bubbly, about 1 1/2 hours.

• Calories 591.43 kcal High
• Protein 24.42 g Good Source
• Carbs 53.79 g Moderate
• Total Fat 32.35 g High
• Saturated Fat 18.81 g High
• Trans Fat 0.0 g Low Source
• Cholesterol 90.33 mg High
• Sodium 516.52 mg High
• Fiber 3.48 g Moderate
• Sugar 7.53 g Moderate
• Added Sugar 0.0 g Low Source
• Calcium 678.9 mg Good Source
• Iron 1.87 mg Moderate
• Potassium 1153.53 mg Good Source
• Vitamin A 78.65 mcg_rae Low Source
• Vitamin C 36.94 mg Good Source
• Vitamin D 1.87 mcg Low Source

Values are per serving. Percent Daily Values are based on a 2,000-calorie diet.

• Milk 🥛
• Wheat 🌾
• Gluten
• Onions 🧅