Death by Chocolate Cupcakes

Bahan-bahan (12 porsi)

• 1/2 cup (8 Tbsp; 113g) unsalted butter
• 2 ounces semi-sweet baking chocolate
• 1/2 cup (41g) unsweetened cocoa powder (not Dutch processed)
• 3/4 cup (94g) all-purpose flour* (spooned & leveled)
• 1/2 teaspoon baking soda
• 3/4 teaspoon baking powder
• 1/4 teaspoon salt
• 2 large eggs, at room temperature*
• 1/2 cup (100g) granulated sugar
• 1/4 cup (50g) packed light brown sugar
• 1 teaspoon pure vanilla extract
• 1/2 cup (120ml) buttermilk*
• 2 and 3/4 cups (330g) confectioners’ sugar
• 2/3 cup (55g) unsweetened cocoa powder
• 6 Tablespoons (85g) unsalted butter, softened to room temperature
• 6 Tablespoons (95ml) heavy cream
• 1 teaspoon pure vanilla extract
• optional: 1/3 cup (60g) semi-sweet chocolate chips for decoration