INGREDIENTS
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6 large egg yolks
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1 tablespoon finely grated lemon zest, plus 1/2 cup fresh lemon juice (about 3 lemons total)
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3/4 cup granulated sugar
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Pinch of salt
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1/2 cup (1 stick) cold unsalted butter, cut into pieces
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3 large egg whites, room temperature
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1/2 cup sugar
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1/4 cup (1/2 stick) unsalted butter, melted
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2/3 cup confectioners' sugar, sifted
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2 large egg whites, room temperature
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1/2 cup sifted all-purpose flour
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1/2 teaspoon pure vanilla extract