"To keep these cookies flaky and light, do not overmix the butter and sugars; they should be combined but not be too soft when you add the remaining ingredients...."
INGREDIENTS
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3/4 cup (1 1/2 sticks) unsalted butter
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1/4 cup granulated sugar
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1/4 cup confectioners' sugar
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2 tablespoons grated lime zest, (2 medium limes)
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2 tablespoons fresh lime juice
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1/4 teaspoon salt
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1 1/2 cups all-purpose flour
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3/4 cup confectioners' sugar
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5 teaspoons fresh lime juice
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1 teaspoon grated lime zest