moms famous chocolate cake

2 - sticks of margrine (softened)
2 - cups sugar
2 - eggs beaten
1 - cup coco
2 - tsp vanilla
2 - cups hot water
2 - tsp baking soda (put in last)

mix all ingredents together. pour into a 9x13 cake pan.
bake at 350* need to keep checking with a toothpick.
atleast 30 mins before 1st check. (all ovens are differ)