Lancaster County, the birthplace of the Whoopie pie, offers a simple and easy-to-follow recipe to make these delicious Amish treats in your own home. The recipe requires first making the cookies and then the filling.
To make the cookies, mix 4 coups flour, 1 cup cocoa, 1 pinch of salt, and 2 teaspoons of baking soda in a large bowl. In a separate bowl, mix 2 cups of sugar, 1 cup of shortening and 2 eggs. Beat for two minutes before combining with the dry ingredients. Add 1 cup of warm water and 1 cup of milk, and beat on medium speed for two to three minutes. Add 2 teaspoons of vanilla until well-blended. Drop even amounts of batter on a non-stick baking sheet, and bake for 10 to 12 minutes in a preheated oven at 375 degrees Fahrenheit. After removing from the oven, place them on a wire rack to cool.
To make the filling, beat 2 egg whites until stiff. In a separate bowl, combine and beat thoroughly 4 tablespoons of flour, 1 1/2 cups of vegetable shortening, 4 tablespoons of milk, 2 teaspoons of vanilla and 4 cups confectioner's sugar. Gently fold in the beaten egg whites.
Spread as much filling as desired on a cooled cookie, and top with another cookie. For storage, you can wrap them individually in plastic.
For a variation, substitute the cocoa for chocolate chips to make chocolate chip cookie Whoopie pies, or add red food dye for red velvet Whoopie pies.