Ingredients:
- 1 1/2 cups (192g) all-purpose flour
- 3/4 cup (75g) unsweetened cocoa powder
- 1 1/2 teaspoons baking soda
- 3/4 teaspoon baking powder
- 3/4 teaspoon salt
- 1 1/2 cups (300g) granulated sugar
- 3/4 cup (180ml) vegetable oil
- 3 large eggs
- 3/4 cup (180ml) buttermilk
- 1 1/2 teaspoons vanilla extract
- 3/4 cup (180ml) boiling water
- 8 ounces (227g) semi-sweet chocolate, finely chopped
- 1 cup (240ml) heavy cream
- 4 ounces (113g) white chocolate, finely chopped
Instructions:
- Preheat oven to 350°F (175°C). Line a 12-cup muffin tin with cupcake liners.
- In a large bowl, whisk together flour, cocoa powder, baking soda, baking powder, and salt.
- In a separate bowl, whisk together sugar, oil, eggs, buttermilk, and vanilla extract.
- Gradually add the wet ingredients to the dry ingredients, mixing until just combined.
- Carefully stir in the boiling water (batter will be thin).
- Fill each cupcake liner about 2/3 full.
- Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
- Let the cupcakes cool in the muffin tin for a few minutes, then transfer to a wire rack to cool completely.
- Heat heavy cream in a saucepan over medium heat until just simmering. Pour over the chopped chocolate in a heatproof bowl. Let stand for 1 minute, then whisk until smooth and glossy.
- Once the cupcakes are completely cooled, frost them with the chocolate ganache.
- Melt the white chocolate in a microwave or double boiler.
- Transfer the melted white chocolate to a piping bag or Ziploc bag with a small corner snipped off. Pipe a spiral of white chocolate on top of each cupcake.
- Using a toothpick or skewer, draw lines from the center of the spiral outwards to the edge of the cupcake, creating a spiderweb effect.
- Let the cupcakes chill in the refrigerator for at least 30 minutes to set the ganache and spiderweb.