Ingredients
Method
Instructions
- Preheat your oven to 350°F (175°C). Grease a 12x17-inch jelly roll pan or sheet cake pan.
- In a large mixing bowl, whisk together flour, sugar, and salt. Set aside.
- In a saucepan, melt butter over medium heat. Add cocoa powder and whisk until smooth. Carefully add boiling water, bring to a boil for 30 seconds, then remove from heat.
- Pour the hot cocoa mixture over the flour mixture and stir until just combined.
- In a small bowl, whisk together buttermilk, eggs, baking soda, and vanilla. Add this to the chocolate batter and mix until smooth.
- Pour batter into the prepared pan and bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake bakes, prepare the icing. Melt butter in a saucepan over medium heat. Stir in cocoa powder and milk until smooth. Remove from heat and whisk in powdered sugar and vanilla until creamy.
- As soon as the cake comes out of the oven, pour the warm icing over the hot cake and spread evenly. Sprinkle with pecans if using. Allow to cool completely before slicing.
Notes
The key to that signature fudgy icing is pouring it over the hot cake. Don't overmix the batter – mix just until ingredients are combined. Use quality cocoa powder for best flavor. Store covered at room temperature for up to 3 days.
