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Baked cheesy scalloped potatoes served in a dish for a hearty side dish

Cheesy Scalloped Potatoes

Indulge in layers of tender Yukon Gold potatoes smothered in a creamy cheese sauce, topped with bubbly perfection for a comforting side dish that's a crowd-pleaser.
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Prep Time 20 minutes
Cook Time 1 hour
Total Time 1 hour 20 minutes
Servings: 8 servings
Course: Comfort Food, Side Dish
Cuisine: American
Calories: 350
Ingredients Method Notes

Ingredients
  

For the cheese sauce
  • 2 tablespoons unsalted butter
  • 1 small yellow onion, finely chopped
  • 2 cloves garlic, minced
  • 2 tablespoons all-purpose flour
  • 1 1/2 cups whole milk
  • 1 cup heavy cream
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon dried thyme
  • 1 1/2 cups shredded sharp cheddar cheese
  • 1/2 cup grated Parmesan cheese
For the potatoes
  • 2 pounds Yukon Gold potatoes, thinly sliced
  • optional Chopped fresh parsley for garnish

Method
 

Preparation
  1. Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish.
  2. In a medium saucepan, melt butter over medium heat.
  3. Add onion and cook for 3–4 minutes until soft.
  4. Add garlic and sauté for 30 seconds.
  5. Whisk in flour and cook for 1–2 minutes.
  6. Gradually whisk in milk and cream.
  7. Add salt, pepper, and thyme. Simmer for 3–5 minutes until thickened.
  8. Remove from heat and stir in 1 1/2 cups cheddar cheese until melted and smooth.
Assembling
  1. Layer half of the thinly sliced potatoes in the dish. Pour over half the cheese sauce.
  2. Repeat with remaining potatoes and sauce. Top with remaining 1/2 cup cheddar and all the Parmesan cheese.
Baking
  1. Cover with foil and bake for 30 minutes.
  2. Remove foil and bake for an additional 25–30 minutes until golden and bubbly. Potatoes should be fork-tender.
  3. Let rest for 10 minutes before serving. Garnish with fresh parsley if desired.

Notes

For best results, use a mandoline slicer for even potato slices. You can also substitute with other cheeses like Gruyère or fontina for varied flavors. Gluten-free options are available using almond flour or a gluten-free blend.