INGREDIENTS
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8 tablespoons (1 stick) butter, softened at room temperature
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1/4 cup vegetable shortening
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2 cups sugar
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3 eggs
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2 teaspoons pure vanilla extract
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3/4 cup unsweetened cocoa powder
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1 teaspoon baking powder
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1 teaspoon baking soda
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1/2 teaspoon salt
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2 1/4 cups cake flour
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1 cup whole, 2 percent fat, or 1 percent fat milk
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Custard, recipe follows
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3 cups water
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2 1/2 cups sugar
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1 tablespoon corn syrup
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1 1/2 cups unsweetened cocoa powder
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Scant 2/3 cup cornstarch
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6 tablespoons (3/4 stick) unsalted butter, cut into pieces
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1/2 teaspoon pure vanilla extract