Whoopee Pies
["1/2 c. butter", "1 c. sugar", "1 egg", "1 tsp. vanilla", "1/2 c. milk", "2 c. flour", "1/2 tsp. baking powder", "1 1/2 tsp. soda", "1/2 tsp. salt", "1/2 c. cocoa"]
["Mix ingredients in order given. Beat until smooth. Drop by rounded teaspoon onto greased cookie sheet. Bake at 350\u00b0 for 7 minutes."]
["butter", "sugar", "egg", "vanilla", "milk", "flour", "baking powder", "soda", "salt", "cocoa"]