1/2 c. butter
1 c. sugar
1 egg
1/4 c. milk
1 tsp. vanilla
1 3/4 c. flour
1/2 tsp. salt
1/2 c. cocoa

Cream butter and sugar; add egg, milk, and vanilla. Add flour, salt, and cocoa. Drop by teaspoon onto greased sheet. Bake 8 minutes at 350 degrees. Remove from oven and press 1/2 marshmallow on top of each cookie. Cool, then frost.

FROSTING:

2 c. powdered sugar
5 tbsp. cocoa
1/8 tsp. salt
3 tbsp. melted butter
4-5 tbsp. milk

Mix until smooth.