1 c. shortening
2 c. sugar

2 egg yolks
1/2 c. cocoa
1 tsp. salt
2 tsp. vanilla

1 c. sour milk
4 c. flour

1 c. hot water
2 tsp. baking soda

Drop from spoon onto gagged cookie sheet. Bake at 350 degrees oven until done.

FILLING:

2 stiffly beaten egg whites
2 tsp. vanilla
4 tbsp. flour
1 c. shortening
4 tbsp. milk
2 c. powdered sugar

Mix and beat until fluffy. Spread between the cookies.