"The secret to this sensational cake is spiraling the cake and buttercream layers around each other for a stunning reveal inside...."
INGREDIENTS
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8 large eggs, whites and yolks separated
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2/3 cup plus 3½ tablespoons granulated sugar, divided
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1 tablespoon lemon juice
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3/4 teaspoon finely grated lemon zest (from 1 small lemon)
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1/2 cup plus 1 tablespoon all-purpose flour
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1/8 teaspoon salt
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Powdered sugar, for dusting
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12 ounces blackcurrants, fresh or frozen and defrosted, divided
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1/4 cup granulated sugar
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1/4 cup light corn syrup
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1/2 cup plus 1 tablespoon granulated sugar
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1/2 vanilla bean, seeds scraped and reserved
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4 large egg yolks
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1¼ cups plus 1 tablespoon unsalted butter, cut into 1-inch cubes, softened
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1/2 cup blackcurrant pureé (recipe above)