Whoopie Pies

From the web: http://www.marshmallowfluff.com/pages/whoopie_pies.html

Ingredients for CAKES:

    * 1 egg
    * 1/3 c. vegetable oil
    * 1 c. sugar
    * 2 c. unsifted all-purpose flour
    * 1/3 c. unsweetened cocoa
    * 1 tsp. baking soda
    * 1/4 tsp. salt
    * 3/4 c. milk
    * 1 tsp. vanilla
    * Filling (recipe follows) 

 
Heat oven to 350 F. Grease two large cookie sheets and set 
aside. In a large bowl with mixer at medium speed beat egg 
and vegetable oil. Gradually beat in sugar and continue 
beating until pale yellow in color. In another bowl, combine 
flour, cocoa, baking soda and salt. In a measuring cup 
combine milk and vanilla. Add flour and milk mixtures alternately 
to eggs and sugar, beginning and ending with dry ingredients. 
Drop by tablespoons onto cookie sheet. These will spread a lot, 
so make 6 cakes per sheet at a time. Bake about 5 minutes or 
until top springs back when lightly touched with finger. 
Remove to wire racks to cool. When cool, use filling and two 
cakes to make sandwiches. Makes 15.

FILLING

    * 1/2 c. butter or margarine
    * 1 c. confectioners' sugar
    * 1 c. Marshmallow Fluff (about 1/2 of a 7 1/2-oz. jar)
    * 1 tsp. vanilla 

In a medium bowl with mixer at medium speed, beat butter and 
remaining ingredients until light and fluffy.

---------------------
Notes: it took more like 10 minutes per cake in my oven, but
I made them very large and used margarine, not butter.
It took two cookie sheets to make about 12 of the pies which
made six delicious "Whoopie Pies".  I have since made smaller
ones and usually make slightly more filling - works great!