INGREDIENTS
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For the Crust:
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1/2 cup (4 ounces) cold unsalted butter, cut into small cubes
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1 1/2 cup all-purpose flour
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2 teaspoons granulated sugar
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1/2 teaspoon salt
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1/3 cup cold buttermilk
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For the Filling:
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2 cups mashed cooked sweet potatoes, from 2 medium sweet potatoes
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3/4 cup packed brown sugar
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1 1/4 teaspoon ground coriander
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1/2 teaspoon freshly grated nutmeg
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1/2 teaspoon cinnamon
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1/4 teaspoon salt
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1/4 cup (2 ounces) unsalted butter
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1 1/4 cup (10 ounces) evaporated milk, divided
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1/3 cup granulated sugar
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3 large eggs
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1 tablespoon pure vanilla extract