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Cheesy Scalloped Potatoes

This version is rich and cheesy with a velvety garlic-infused sauce that coats each layer of thinly sliced potatoes. It’s simple to prepare but delivers that “wow” factor every time. If you're looking for a classic side dish that pairs beautifully with almost anything, Cheesy Scalloped Potatoes are exactly what you need.
Prep Time20 minutes
Active Time1 hour 15 minutes
Total Time1 hour 35 minutes
Course: dinner
Cuisine: American
Keyword: Cheesy Scalloped Potatoes
Yield: 8

Equipment

  • Large saucepan (for making the cheese sauce)
  • Mandoline slicer or sharp knife (to evenly slice the potatoes)
  • 9x13 inch baking dish
  • Whisk
  • Cutting board and measuring cups/spoons
  • Aluminum foil (for covering while baking)

Materials

  • 2 pounds potatoes peeled and thinly sliced (Yukon gold or Russet are great)
  • ¼ cup butter
  • 1½ teaspoons minced garlic
  • 3 tablespoons all-purpose flour
  • 2 cups whole milk or half-and-half for richer flavor
  • 1½ cups shredded cheddar cheese plus extra for topping
  • Salt and black pepper to taste
  • Optional: chopped parsley thyme, or paprika for garnish

Instructions

Step 1: Preheat the Oven

  • Preheat your oven to 375°F (190°C) and lightly grease a 9x13-inch baking dish.
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Step 2: Prepare the Cheese Sauce

  • In a saucepan over medium heat, melt the butter.
  • Add the minced garlic and cook for 1 minute until fragrant.
  • Whisk in the flour and cook for 1–2 minutes, stirring constantly to remove the raw flour taste.
  • Gradually pour in the milk, whisking continuously to prevent lumps.
  • Cook until the mixture begins to thicken—about 4–6 minutes.
  • Stir in 1½ cups of shredded cheddar cheese until melted and smooth.
  • Season with salt and black pepper to taste.
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Step 3: Slice the Potatoes

  • Using a mandoline slicer or sharp knife, slice the potatoes thinly (about ⅛ inch thick). Try to keep the slices uniform so they cook evenly.
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Step 4: Assemble the Dish

  • Arrange half the sliced potatoes in the prepared baking dish.
  • Pour half the cheese sauce over the potatoes, spreading evenly.
  • Layer the remaining potatoes on top.
  • Pour the rest of the cheese sauce over the second layer of potatoes.
  • Top with an extra sprinkle of cheddar cheese for a bubbly, golden finish.
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Step 5: Bake

  • Cover the dish tightly with foil.
  • Bake for 45 minutes.
  • Remove foil and bake for another 25–30 minutes, or until the top is golden and bubbly and the potatoes are fork-tender.
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Step 6: Let Rest & Serve

  • Allow the dish to rest for 10 minutes before serving. This helps the sauce set slightly, making it easier to slice and serve.
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