INGREDIENTS
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Yield: 2 dozen cookies
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Prep Time: 20 minutes, plus freezing and cooling time
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Cook Time: 15 minutes
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Total Time: 35 minutes, plus freezing and cooling time
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For the Cookies:
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2 1/2 cups all-purpose flour
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1/2 cup unsweetened cocoa powder
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1 stick, plus 5 tablespoons, unsalted butter, softened
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2/3 cup granulated sugar
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3/4 teaspoon fine sea salt
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1 large egg white
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1 teaspoon vanilla extract
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For the Filling:
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6 tablespoons unsalted butter, softened
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1 1/4 cups confectioners’ sugar
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2 teaspoons vanilla extract
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1/4 teaspoon fine sea salt