1/2 c. shortening
1 1/2 c. sugar
2 eggs
2 3/4 c. flour
1/2 c. cocoa
1/2 tsp. salt
1/2 tsp. baking soda
1/2 tsp. baking powder
1/2 c. sour milk (milk with 1 tsp. vinegar)
1/2 c. hot water

Filling:

2 egg whites
2 c. confectioners sugar
1 tsp. vanilla
1/2 c. shortening

Cream shortening, sugar and eggs. Sift dry ingredients and add alternately with sour milk and water. Drop by spoonful on cookie sheet. Preheat oven to 350°F and cook for 8 minutes.

Filling: Beat egg whites and shortening. Add sugar gradually. Add vanilla. Put filling between two cookies until all gone.