1/2 c. shortening
1 c. sugar
2 egg yolks
1 tsp. vanilla
2 c. flour
1 tsp. baking powder
1 tsp. baking soda
1/2 tsp. salt
4 tbsp. cocoa
1 c. sour milk

Cream shortening and sugar. Add egg yolks and vanilla. Add sifted dry ingredients alternately with sour milk. Place by tablespoonfuls onto greased cookie sheet. Bake at 400 degrees for 10 minutes. Cool cookies before filling.

FILLING:

2 egg whites
3/4 c. shortening
2 c. powdered sugar
1 tsp. vanilla
Salt

Beat egg whites until light and fluffy. Cream shortening and sugar until smooth and add to beaten egg whites. Add vanilla and a pinch of salt. Fill between 2 cookies sandwich-fashion.