1 c. water
1/2 c. oil
3 tbsp. cocoa
1 stick butter
2 c. flour
2 c. sugar
1 tsp. baking soda
2 eggs
1/2 c. buttermilk or sour milk (1/8 c. vinegar and 7/8 c. milk)
1 tsp. vanilla

Bring first 4 ingredients to a boil. Add flour, sugar, soda, eggs, buttermilk or sour milk, and vanilla. Bake in a greased sheet pan at 325 degrees for 25 minutes.

ICING:

3 tbsp. cocoa
1 stick butter
1/2 c. milk
1/2 c. peanut butter; optional
1 box powdered sugar
1 tsp. vanilla

Bring first 4 ingredients to a boil. Add sugar and vanilla. Ice immediately after taking out of the oven. Let cool.