Ingredients

• 2 cups all-purpose flour
• 2 cups white sugar
• 1 teaspoon baking soda
• 0.5 teaspoons salt
• 0.5 cups sour cream
• 2 eggs
• 1 cup butter
• 1 cup water
• 5 tablespoons unsweetened cocoa powder

Instructions

1. 1 Gather all ingredients.
2. 2 Preheat the oven to 350 degrees F (175 degrees C). Grease and flour a 10x15-inch jelly roll pan.
3. 3 Make cake: Combine flour, sugar, baking soda, and salt in a mixing bowl. Beat in sour cream and eggs.
4. 4 Melt butter in a saucepan over low heat. Stir in water and cocoa powder. Bring mixture to a boil then remove from the heat.
5. 5 Allow to cool slightly, then stir cocoa mixture into the flour and egg mixture until blended. Pour batter into the prepared pan.
6. 6 Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 20 minutes. While the cake is baking, make icing: Combine milk, cocoa powder, and butter in a large saucepan over medium heat.
7. 7 Bring to a boil, then remove from heat. Stir in confectioners' sugar and vanilla, then fold in walnuts, mixing until blended.
8. 8 Spread icing over warm cake.
9. 9 Serve and enjoy!

Nutrition per serving