Grandma always made and decorated this cake for each of us on our birthday. Now that Grandma has past on my brother and his family like for me to carry on the tradition. My children love it, also. (When I was a young girl Grandma taught me how to bake and cook. We tried this recipe and I forgot to put in the baking soda which helps it to rise and my cake had no life in it. It took us a little time to figure out what I'd done wrong. We had a good laugh!
Preheat oven to 350 F. Mix first 6 ingredients in a large bowl. Put oleo, cocoa and water in a sauce pan. Bring these 3 to a boil. Add the mixture in the sauce pan to the mixture in the bowl. Mix well. Pour into greased and floured cookie sheet. 15 1/2 x 12 1/2 inches.
Bring the oleo, cocoa and milk to boil in a sauce pan. Add to the powdered sugar in a medium bowl. Beat until smooth. Add vanilla. Frost while still warm.