Cookies:
2 c. Flour
1/3 c. Unsweetened Cocoa
1 tsp. Baking Powder
1 tsp. Soda
1/2 tsp. Salt
1 c. Granulated Sugar
1/2 c. Shortening
2 Egg Yolks
1 tsp. Vanilla
1 c. Milk

In a small mixing bowl combine flour, cocoa,baking powder, soda and salt, set aside.
In another mixing bowl cream sugar, shortening, eggs and vanilla.
Gradually add flour mixture to creamed mixture alternating with milk.
Drop by small spoonfuls onto parchment lined cookie sheets.
Bake 10-12 minutes at 375°F.
When cool sandwich together two cookies at a time with frosting.

Frosting:
2 c. Powdered Sugar
1/2 c. Shortening
2 Egg Whites
1 tsp. Vanilla
1/4 tsp. Salt

Beat together all ingredients until smooth and creamy.