Ingredients
Method
Instructions
- Preheat your oven to 350°F (175°C). Grease a 15x10x1-inch jelly roll pan or a standard baking sheet with sides.
- In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt. Set aside.
- In a medium saucepan, combine the butter, water, and cocoa powder. Bring to a boil over medium heat, stirring constantly. Remove from heat and pour over the dry ingredients. Mix until well combined.
- In a separate bowl, beat the eggs, buttermilk, and vanilla extract. Add this to the chocolate mixture and stir until smooth and well incorporated.
- Pour the batter into the prepared pan and spread evenly. Bake for 20-25 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake is baking, prepare the icing. In a medium saucepan, combine the butter, milk, and cocoa powder. Bring to a boil, then remove from heat. Whisk in the powdered sugar and vanilla until smooth. Stir in nuts if using.
- Pour the warm icing over the hot cake as soon as it comes out of the oven. Spread evenly with a spatula. Allow the cake to cool completely before cutting into squares.
Notes
For best results, make sure all ingredients are at room temperature. Don't overmix the batter. Pour warm icing over hot cake to create signature texture. Cake tastes better the next day as flavors develop.
