Whoopie Pies
["1 c. shortening", "2 c. sugar", "2 eggs", "1 c. sour milk", "2 tsp. vanilla", "4 c. flour", "1 scant c. cocoa", "2 tsp. salt", "1 c. hot water", "2 tsp. soda"]
["Note:", "Make filling before cookies and icing when warm."]
["shortening", "sugar", "eggs", "sour milk", "vanilla", "flour", "cocoa", "salt", "water", "soda"]