INGREDIENTS
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2 sticks (1 cup) salted butter, cut into small cubes, plus more for buttering the pan
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2 cups all-purpose flour
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1/2 cup granulated sugar
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1/4 teaspoon kosher salt
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3/4 cup granulated sugar
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1/4 cup all-purpose flour
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4 large eggs
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Zest and juice of 4 oranges (making about 1 cup of juice)
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Powdered sugar, for sifting