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This retro casserole tastes kinda like potato mac and cheese. (We guarantee they'll haunt you for life!)
Ingredients
  • 3 medium russet potatoes (2 ½ to 3 pounds total), or1 (32-ounce) bag frozen shredded hash browns
  • 2 tablespoons apple cider vinegar
  • 1 tablespoon plus 2 teaspoons kosher salt, divided, plus more as needed
  • 1 medium yellow onion
  • 2 cloves garlic
  • 8 ounces extra-sharp cheddar cheese, preferably orange
  • 8 tablespoons (1 stick) unsalted butter, preferably cultured, divided, plus more for the baking pan
  • ¼ cup all-purpose flour
  • 2 cups low-sodium chicken broth
  • 1 cup whole milk
  • 1 teaspoon powdered ground mustard
  • 1 teaspoon freshly ground black pepper, plus more as needed
  • ½ teaspoon ground cayenne pepper
  • 1 cup sour cream
  • 4 cups cornflake cereal
Steps
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