Ingredients
Method
Instructions
- Preheat oven to 350°F (175°C). Grease and flour a 15x10-inch jelly roll pan
- Whisk together flour, sugar, baking soda, and salt in a large bowl
- Combine butter, cocoa powder, and water in saucepan, bring to boil, then remove from heat
- Pour hot chocolate mixture over dry ingredients and stir until combined
- Whisk buttermilk, eggs, and vanilla together, then add to chocolate batter
- Pour batter into prepared pan, spread evenly, bake 20-25 minutes
- While cake bakes, combine butter, cocoa powder, and milk in saucepan, bring to boil
- Remove icing from heat, stir in powdered sugar and vanilla until smooth, add nuts if using
- Pour warm icing over hot cake immediately after removing from oven, spread evenly
- Allow cake to cool completely before cutting into squares
Notes
Use correct pan size for even baking; pour warm icing over hot cake for signature fudgy texture; buttermilk substitute: 1 tbsp lemon juice/vinegar + 1 cup milk; cake tastes better next day as flavors meld
