INGREDIENTS
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3/4 cup (1 1/2 sticks) unsalted butter, at room temperature
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3/4 cup granulated sugar
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2 large egg yolks
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1/2 teaspoon pure vanilla extract
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1/4 teaspoon kosher salt
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2 cups all-purpose flour
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1 cup confectioners' sugar
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2 tablespoons fresh lemon juice, plus more if necessary
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1 teaspoon grated lemon zest