INGREDIENTS
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3 ounces semisweet chocolate, chopped
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1 1/2 sticks (3/4 cup) unsalted butter, softened
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1 1/2 cups granulated sugar
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1/2 cup firmly packed light brown sugar
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1 3/4 cups sour cream
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1 1/2 teaspoons vanilla extract
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3 large eggs
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2 cups all-purpose flour
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1/2 cup unsweetened cocoa powder (not Dutch-process)
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1 teaspoon baking soda
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1/2 teaspoon salt
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3 ounces semisweet chocolate, chopped
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2 cups sour cream
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1 cup heavy cream
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1 cup confectioners' sugar
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1 teaspoon vanilla extract
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3 ounces semisweet chocolate, chopped
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2 tablespoons unsalted butter
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1 cup semisweet chocolate chips and 1/2 cup semiseet chocolate shavings, shaved with a vegetable peeler from a bar of chocolate, for coating side of cake