WHOOPIE PIES

Preheat oven to 375.
Sift together and set aside:
    2 C Flour    
    5 T. Cocoa
    1 t. baking powder
    1 t. baking soda
    1/2 t. salt

In a large mixing bowl beat together:
    1 C Sugar
    1/2 C shortening
    2 egg yolks(reserve whites to use for filling)
    1 t. vanilla

To creamed mixture gradually add sifted ingredients with 1 C milk.  
Beat all together until smooth.

Drop mixture by teaspoonfuls onto ungreased cookie sheet.
  Bake 8-10 minutes.  Remove to cooling rack.

Prepare filling.  Beat together until peaks form:
    2 egg whites
    1/2 C shortening
    1 t. vanilla
    2 C confectioners sugar

Make sandwiches with cooled cookie halves.  Makes 24-30.