1 c. shortening
2 c. sugar
4 eggs (save 2 whites)
1 tsp. vanilla
1 c. sour milk
1 c. hot water
2 tsp. baking powder
4 1/2 c. flour
2/3 c. cocoa
2 tsp. baking soda

Mix thoroughly together, shortening, sugar, eggs and vanilla. Stir in sour milk, hot water, baking powder, flour, cocoa and soda. Mix together and drop by teaspoonfuls on ungreased cookie sheets.

Bake at 350 for about 10 minutes.

Filling:

1 c. shortening
3 c. powdered sugar
2 tsp. vanilla
4 tbsp. milk
2 egg whites

Beat together until light and fluffy. Spread about 1/2 inch thick between cookies.