1/2 c. butter
1 c. white sugar
1 egg
1 tsp. vanilla
1 c. milk
2 c. flour
1/2 tsp. baking powder
1/2 tsp. baking soda
1/2 tsp. salt
1/2 c. cocoa

Mix all ingredients together in order listed, beating until smooth after each addition. Drop by rounded teaspoon on buttered cookie sheet. Bake at 400 degrees for 7 minutes. Cool.

MARSHMALLOW FILLING:

1/2 c. white shortening
2 c. powdered sugar
1 c. marshmallow whip
1 tsp. vanilla
3 or 4 tsp. milk

Cream shortening and sugar together, and beat in other ingredients. Spread a large gob between 2 cookies.