Aunt Pam's Chocolate Sheet Cake

Melt together and bring to a boil:

1 cube margarine

1/2 C cooking oil

1 C water

3 T cocoa

Remove from heat and add:

2 C sugar

2 C flour

1 tsp soda

1 tsp vanilla

2 eggs

1 C buttermilk or 1 C milk with 1 T vinegar added

Cook at 375 for 15 minutes. Frost while hot.

Frosting:

1 cube margarine

3 T milk

3 1/2 T cocoa

Melt together and add one box powdered sugar.