Instructions

  1. Preheat the oven to 375 degrees F (190 degrees C). Grease cookie sheets.
  2. In a large bowl, cream together butter, brown sugar and white sugar until smooth.
  3. Beat in the eggs one at a time, then stir in the vanilla.
  4. Combine the flour, cocoa, baking soda and salt; stir into the creamed mixture.
  5. Mix in the chocolate chips and marshmallows.
  6. Drop by rounded spoonfuls onto the prepared cookie sheets about 2 inches apart. These will spread quite a bit, so make sure the cookies are not too big.
  7. Bake for 8 to 10 minutes in the preheated oven.
  8. Allow cookies to cool on baking sheet for 5 minutes before removing to a wire rack to cool completely.