Black Velvet Cupcakes

Bahan-bahan (14 porsi)

• 1 cup (125g) all-purpose flour (spooned & leveled)
• 1/2 cup (42g) black cocoa powder (a dark, Dutch-process cocoa)*
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (200g) granulated sugar
• 1/2 cup (120g/ml) buttermilk*, at room temperature
• 1/3 cup (75g/80ml) vegetable oil
• 1 large egg, at room temperature
• 1 teaspoon pure vanilla extract
• 1/2 teaspoon distilled white vinegar
• 1/2 cup (120g/ml) hot coffee* (decaf is fine) or hot water
• 1 cup (16 Tbsp; 226g) unsalted butter, softened to room temperature
• 3 and 1/2 cups (420g) confectioners’ sugar
• 1/2 cup (42g) black cocoa powder (a dark, Dutch-process cocoa)*
• 4 –5 Tablespoons (60–75g/ml) heavy cream or milk, at room temperature
• 2 teaspoons pure vanilla extract
• 1/8 teaspoon salt