1 c. shortening
2 c. sugar
2 whole eggs plus two yolks
1 c. cocoa
2 tsp. baking soda
1/2 tsp. salt
4 c. flour
1 c. sour milk
1 c. hot water
1 tsp. vanilla
1 tsp. baking powder

Cream shortening, sugar and eggs until smooth, add dry ingredients alternately with liquids, using first water then milk. Drop by teaspoons onto cookie sheet and bake at 350 degrees for 10 minutes. Remove from oven and let cool a little. Have filling ready.

FILLING:

2 unbeaten egg whites in a bowl

2 tsp. vanilla
4 tbsp. flour
2 tbsp. powdered sugar
2 tbsp. milk
1 c. vegetable shortening

Beat until very light and smooth. Gradually, add 1 box powdered sugar. Beat until light and fluffy. Spread on cookie and top with another one.