Instructions

  1. Heat oven to 350°F.
  2. Spray cookie sheets with cooking spray.
  3. Beat butter and sugars with electric mixer until creamy.
  4. Add eggs and vanilla; beat well.
  5. Add coffee if using or milk substitute and mix well.
  6. Add combined flour, baking soda and salt; mix well.
  7. Stir in oats (and extra flour if using old fashioned), chocolate chips and walnuts.
  8. To shape cookies, flatten 1 heaping Tbsp of dough in palm of hand.
  9. Arrange 4 marshmallows in center; wrap dough around marshmallows to cover completely.
  10. Repeat with remaining dough and marshmallows.
  11. Space cookies 2" apart on cookie sheets.
  12. Bake 10-12 minutes or until edges are golden brown.
  13. (Do not overbake; centers of cookies should still be soft.) Let stand 2 minutes on cookie sheets; remove to wire racks.
  14. Cool completely.
  15. Store tightly covered.