Ingredients:

  • 2 cups (250g) all-purpose flour
  • 2 cups (400g) granulated sugar
  • 3/4 cup (75g) unsweetened cocoa powder
  • 2 tsp (10g) baking soda
  • 1 tsp (5g) baking powder
  • 1 tsp (5g) salt
  • 1 cup (240ml) buttermilk
  • 1/2 cup (120ml) vegetable oil
  • 2 large eggs
  • 2 tsp (10ml) vanilla extract
  • 1 cup (240ml) boiling water
  • 4 oz (115g) semi-sweet chocolate, chopped
  • 1/2 cup (120ml) heavy cream
  • 1 tbsp (15g) unsalted butter

Instructions:

  1. Preheat oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with parchment paper.
  2. In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until no large lumps remain.
  3. Add the buttermilk, oil, eggs, and vanilla extract to the dry ingredients. Whisk by hand until the batter is smooth and cohesive.
  4. Carefully stir in the boiling water with a spatula until combined; the batter will be thin.
  5. Pour the batter into the prepared pan and bake for 30–35 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
  6. Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
  7. Place chopped chocolate in a bowl. Heat heavy cream in a pot until it begins to simmer, then pour the hot cream over the chocolate.
  8. Let the chocolate and cream sit for 5 minutes, then stir gently from the center outward until glossy and smooth.
  9. Stir in the butter until melted and pour the glaze over the cooled cake.