My favorite is the one that use to be on the old metal can of Hershey's cocoa.
10 T melted oleo
6 T cocoa
2 c sugar
1 T vanilla
2 T vinegar
2 c cold water
3 c sifted flour
2 t. baking soda
2 t. salt
Frosting
5 T flour
1 c milk
1/2 c oleo, softened
1/2 c vegetable shortening
1 c granulated sugar
1 t. vanilla
1/2 t salt
2 - 4 T cocoa