INGREDIENTS
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5 ounces (about one heaping cup) hazelnuts, blanched to remove dark skins*
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1/2 pound unsalted butter (plus 1 tablespoon melted extra for greasing the pan)
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1/2 vanilla bean
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1 1/3 cups powdered sugar, plus extra for dusting the cake
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1/3 cup all-purpose flour
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5 extra-large egg whites (I used 6 since I was using
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large eggs)
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3 tablespoons granulated sugar