Ingredients
- 8 tablespoons (1 stick) unsalted butter plus more for dish
- 6 slices good white bread crusts removed, torn into 1/4- to 1/2-inch pieces
- 5 1/2 cups milk
- 1/2 cup all-purpose flour
- 2 teaspoons salt
- 1/4 teaspoon freshly grated nutmeg
- 1/4 teaspoon freshly ground black pepper
- 1/4 teaspoon cayenne pepper or to taste
- 4 1/2 cups grated sharp white cheddar cheese (about 18 ounces)
- 2 cups grated Gruyere cheese (about 8 ounces) or 1 1/4 cups grated Pecorino Romano cheese (about 5 ounces)
- 1 pound elbow macaroni
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