INGREDIENTS
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1 recipe Flaky Pie Dough
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1/4 teaspoon cinnamon
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1 cup plus 1 Tbsp. sugar
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4 tablespoons unsalted butter, melted and cooled
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1 1/2 cups buttermilk
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4 large egg yolks
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1/4 cup all-purpose flour
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1 teaspoon vanilla extract
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1/4 teaspoon salt