Texas Sheet Cake

I have great memories of sunday afternoons and a texas sheet cake...this was always one of my favorites! And of course, this famous cake gets its name from the great state of Texas...everything's bigger in Texas!
2 cups flour
2 cups sugar
1 cup margarine-2 squares
1/4 cup cocoa
1 cup water
1/2 cup buttermilk
1 tsp. baking soda
2 eggs
1 tsp. vanilla

Mix flour and sugar in mixer. Heat margarine, cocoa, and water to a boil then pour over flour and sugar. Then add buttermilk, baking soda, eggs and vanilla. It will be thin. Bake at 350 degrees for 20 minutes, using a large cake pan.

ICING:
1/2 cup margarine
6 tbsp. evaporated milk
1/4 cup cocoa
2 cups powdered sugar
vanilla
1 cup nuts
Boil margarine, milk and cocoa then cool. Add powdered sugar, vanilla and 1 cup nuts.

Ingredients: flour, sugar, margarine, cocoa, water, buttermilk, baking soda, eggs, vanilla, evaporated milk, powdered sugar, nuts if desired