4 c. brownie mix
1/2 c. butter
1 c. water
1/2 c. sour cream
2 eggs, slightly beaten
1 tsp. baking soda

ICING:

3 c. powdered sugar
1/2 c. evaporated milk
1/2 c. butter
3 tbsp. cocoa
1 c. chopped nuts
1 tsp. vanilla

Preheat oven to 375 degrees. Grease a 15 x 10 or larger baking pan. Put brownie mix in a large bowl. In a small saucepan, bring butter and water to a boil. Add to brownie mix. Add sour cream, eggs, and baking soda; blend well. Pour into prepared pan. Bake 20-25 minutes until a toothpick inserted in center comes out clean. Prepare cocoa icing. Frost cake while still hot.

For Icing: In a small saucepan, bring evaporated milk, butter, and cocoa to a boil, stirring constantly. Remove from heat. Add to powdered sugar in a medium bowl. Stir in nuts and vanilla.