1. Preheat the oven to 375°F.

2. In a large mixing bowl mix the Butter, Sugar, and Brown Sugar. Cream it very well.

3. Add the Egg and mix well.

4. Add the Milk and the Cocoa and mix well.

5. Add the Salt, Baking Soda, and the Vanilla. Mix.

6. Add the Flour and mix it well.

7. On a greased baking pan, spoon the dough to make the cookies. I like to make large cookies, so I use a big spoon. See the picture.

8. Bake the cookies for 6 minutes. While the cookies are baking, cut the Marshmallows in half.

9. When the cookies have baked for 6 minutes, remove the pan from the oven. Place 1 or 2 of the marshmallow halves on each cookie. It depends on the size of your cookie whether you use 1 or 2 halves. Put the cookies back in the oven and continue baking for 2 more minutes.

10. Remove the cookies from the oven. Let them sit for 4-5 minutes. Remove the cookies from the pan and place them on a cooling rack. Cool completely.

11. Make frosting by mixing the Butter, Milk, Cocoa, Vanilla, and the Powdered Sugar.

12. Frost the cookies when they have cooled completely.

13. Serve and enjoy!