Texas Sheet Cake

Stir together and bring to a boil:
4 T. cocoa
2 cubes margarine
1 C. water
Add in order, mixing after each addition:
2 C. sugar
2 C. flour
½ t/ salt
1 t. soda
2 eggs
½ C. sour cream
Bake in a greased jelly roll pan 20-30 minutes at 350 degrees.
Icing
Bring to a boil:
1 cube margarine
4 T. cocoa
6 T. milk
1 pound powdered sugar
1 t. vanilla
1 C. walnuts
Frost while hot.