"Makes 12 cupcakes. Cupcakes stay fresh at room temperature in an airtight container for up to 4 days. Store covered in the refrigerator is desired for up to 1 week...."
INGREDIENTS
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1/2 cup (1 stick) unsalted butter
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2 ounces semi-sweet baking chocolate
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1/2 cup unsweetened cocoa powder (not Dutch processed)
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3/4 cup all-purpose flour
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1/2 teaspoon baking soda
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3/4 teaspoon baking powder
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1/4 teaspoon salt
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2 large eggs, at room temperature*
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1/2 cup granulated sugar
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1/4 cup light brown sugar
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1 teaspoon vanilla extract
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1/2 cup buttermilk*
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2 and 3/4 cup confectioners' sugar
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2/3 cup unsweetened cocoa powder
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6 Tablespoons unsalted butter, softened to room temperature
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6 Tablespoons heavy cream
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1 teaspoon vanilla extract
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1/3 cup semi-sweet chocolate chips for decoration, optional