Ingredients for Cake:
- 2 cups all-purpose flour
- 2 cups white sugar
- 1 tsp. baking soda
- ½ tsp. salt
- ½ cup sour cream
- 2 eggs
- 1 cup butter
- 1 cup water
- 5 Tbsp. unsweetened cocoa powder
Ingredients for Icing:
- 6 Tbsp. milk
- 5 Tbsp. unsweetened cocoa powder
- ½ cup butter
- 4 cups confectioners’ sugar
- 2 tsp. vanilla extract
- 1 cup chopped walnuts
Directions:
- Preheat the oven to 350 F. Grease and flour a 10-by-15-inch jelly roll pan.
- To make the cake, combine flour, sugar, baking soda and salt in a mixing bowl. Beat in sour cream and eggs. Melt butter in a saucepan over low heat. Stir in water and cocoa powder. Bring mixture to a boil and then remove from the heat.
- Allow to cool slightly and then stir cocoa mixture into the flour and egg mixture until blended. Pour batter into prepared pan.
- Bake in 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. Bring to a boil and then remove from heat.
- Stir in confectioners’ sugar and vanilla, then fold in walnuts, mixing until blended.
- Spread icing over warm cake.