1 c. butter
1 c. water
4 tbsp. cocoa
2 c. flour
2 c. sugar
1/2 tsp. salt
2 eggs
1/2 c. sour cream
1 tsp. baking soda

Bring the first three ingredients to a boil. Put in a mixing bowl and add the next three ingredients and beat. Add last three ingredients and mix well. Pour into greased and floured 18 x 12 inch cookie sheet (with edge).

Bake at 325 degrees for 25 minutes. (If you don't have an 18 x 12 inch cookie sheet, you can use a standard jelly roll pan - but your baking time will be longer. Cake is done when it springs back in center).

FROSTING:

1/2 c. butter
4 tbsp. cocoa
6 tbsp. milk
1 box confectioners' sugar
1 tsp. vanilla
Chopped walnuts (optional)

While cake is baking, make frosting. Bring the first three ingredients to a boil, then add the last three. Frost the cake immediately upon removing it from the oven.