INGREDIENTS
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3 cups all-purpose flour
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1 & 1/2 teaspoons baking soda
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3/4 teaspoon salt
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1 & 1/2 cups unsalted butter, softened
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1 & 1/2 cups granulated sugar
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1 & 1/2 cups firmly packed light brown sugar
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6 large eggs, at room temperature
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9 ounces unsweetened chocolate, melted
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1 & 1/8 cups buttermilk
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1 & 1/2 teaspoons vanilla extract
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3/8 cup sour cream
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1/3 cup unsalted butter, softened
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3 ounces cream cheese, softened
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3 & 3/4 cups sifted confectioners’ sugar
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3 tablespoons heavy cream
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1/2 teaspoon vanilla extract
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1/8 teaspoon salt
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2 tablespoons Frangelico
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2/3 cup unsalted butter, softened
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16 ounces cream cheese, softened
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1/2 cup Dutch-process cocoa powder
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3 cups sifted confectioners’ sugar
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2 tablespoons sour cream
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1 teaspoon vanilla extract