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

Combine water, butter, and cocoa. Bring to boil. Remove from heat and add sugar and flour. Beat well. Add eggs, beat well again. Add sour cream and soda. Pour into 12x17 inch cookie sheet. Batter will be thin. Bake at 350 degrees for 20 minutes.

ICING:

1/3 c. milk
5 tbsp. butter
1 c. sugar
1 sm. pkg. (6 oz.) chocolate chips

Boil milk, butter, and sugar 1 minute. Add chocolate chips. Stir until melted. Spread on warm cake.

My pan measurements are slightly different. I pour the hot mixture into a bowl before I add the sugar and flour.