Ingredients
Method
Instructions
- Preheat your oven to 350°F (175°C). Grease a 15x10-inch jelly roll pan or standard sheet pan with butter or cooking spray.
- In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt until well combined. Set aside.
- In a medium saucepan over medium heat, combine the butter, water, and cocoa powder. Stir constantly until the butter melts and the mixture comes to a gentle boil. Remove from heat immediately.
- Pour the hot chocolate mixture over the dry ingredients and mix until just combined. In a small bowl, whisk together the eggs, buttermilk, and vanilla extract. Add this to the batter and mix until smooth.
- Pour the batter into the prepared pan and spread evenly. Bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake bakes, prepare the icing by combining butter, cocoa powder, and milk in a medium saucepan. Bring to a boil, then remove from heat. Whisk in powdered sugar and vanilla until smooth. Stir in pecans if using.
- Pour the warm icing over the hot cake immediately after removing it from the oven. Spread evenly with a spatula. Allow the cake to cool completely before cutting into squares.
Notes
Buttermilk substitute: mix 1/2 cup milk with 1 1/2 teaspoons white vinegar or lemon juice. Let sit 5 minutes. Rotate pan halfway through baking for even cooking. Cake tastes better the next day - store covered at room temperature up to 3 days. Do not overmix batter for tender crumb.
