Ingredients

• 1 cup salted butter
• 1 cup water
• 3 tablespoons cocoa powder
• 2 cups all-purpose flour
• 2 cups white sugar
• 0.5 teaspoons salt
• 0.5 cups buttermilk
• 2 large eggs
• 1 teaspoon baking soda
• 1 teaspoon vanilla extract

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C). Grease and flour a 10x15-inch cake pan.
2. 2 Prepare the cake: Combine butter, water, and cocoa powder in a saucepan over medium heat. Cook until butter has melted and mixture comes to a boil. Remove from the heat and cool slightly.
3. 3 Meanwhile, mix flour, sugar, and salt together in a large bowl. Beat buttermilk, eggs, baking soda, and vanilla extract together in a separate bowl.
4. 4 Add melted butter mixture to flour mixture, then add buttermilk-egg mixture and beat until thoroughly combined. Pour into the prepared cake pan.
5. 5 Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 20 minutes. Remove cake from the oven and cool on a wire rack for 5 minutes.
6. 6 While the cake bakes, make the frosting: Combine butter, milk, cocoa powder, and vanilla extract in a saucepan over medium heat. Stir until butter melts, then stir in powdered sugar.
7. 7 Spread frosting over the warm cake.

Nutrition per serving