Combine in a large bowl:
2 c. sugar and 2 c. flour
Bring the following to a boil and pour over first 2 ingredients:
1 stick of margarine, 3 tbsp. cocoa, 1/2 c. oil, 1 c. water, add to first 2 ingredients and mix well.
Add the following ingredients:
1/2 c. buttermilk, 1 tsp. baking soda, 1 tsp. vanilla, 1/2 tsp. cinnamon, 2 eggs (slightly beaten) mix well
Bake at 300º for 25 mins. in a 8 X 13 greased and floured pan
2 tbsp. coca, 1 stick margarine, 2 tbsp. milk, bring to a boil and add 1/2 box powdered sugar.
Mix well and pour over cake as soon as it comes out of oven.