1 c. shortening
2 c. sugar
1 c. sour milk
1 c. hot water
4 c. flour
3/4 c. cocoa
1/2 tsp. salt
1/2 tsp. baking powder
2 tsp. baking soda
2 whole eggs plus 2 egg yolks

Mix shortening and sugar. Add all eggs and yolks. Beat well and add 1 cup flour, and all other dry ingredients. Add sour milk, hot water and rest of flour alternately. Mix well and drop by teaspoons onto greased cookie sheet. Bake at 400 degrees for 10 minutes. Put 2 cookies together with the filling.

FILLING:

2 egg whites
4 tbsp. flour
4 tbsp. milk
2 tsp. vanilla
2 tbsp. confectioners' sugar
1 c. butter
4 c. confectioners' sugar

Mix all ingredients together and beat well then add 4 cups confectioners' sugar and mix thoroughly. Spread between 2 cookies.