INGREDIENTS
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3 cups all-purpose flour
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1/2 teaspoon baking powder
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1/4 teaspoon salt
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1 cup (2 sticks) unsalted butter, softened
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1 cup confectioners' sugar, plus 2 more cups for rolling
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1 egg yolk
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1/4 cup freshly squeezed lemon juice
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1 heaping tablespoon lemon zest
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1/2 teaspoon vanilla extract