INGREDIENTS
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1 1/4 cups cake flour (not self-rising), sifted
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3/4 teaspoon baking powder
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1/2 teaspoon coarse salt
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1/4 cup milk
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1 vanilla bean, halved lengthwise, seeds scraped and reserved
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4 tablespoons (1/2 stick) unsalted butter, room temperature, cut into pieces
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3 large whole eggs plus 3 egg yolks, room temperature
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1 cup sugar
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Coffee-marsala syrup
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Mascarpone Frosting
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Unsweetened cocoa powder, for dusting
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Coffee-marsala syrup
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1/3 cup plus 1 tablespoon freshly brewed very strong coffee (or espresso)
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1 ounce marsala
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1/4 cup sugar
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Mascarpone frosting
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1 cup heavy cream
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8 ounces mascarpone cheese, room temperature
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1/2 cup confectioners' sugar, sifted