Mud Cookies

Directions

1. 1
   Preheat oven 350.
2. 2
   Chop bittersweet and unsweetened chocolates.
3. 3
   Place chocolate and butter in large heatproof bowl over slightly smaller saucepan of hot (not boiling) water.
4. 4
   Melt, stirring until about three-quarters melted.
5. 5
   Remove from heat and let finish melting; stir until smooth.
6. 6
   Whisk in sugar, then eggs, 1 at a time, and vanilla.
7. 7
   In separate bowl, whisk together flour, baking powder and salt.
8. 8
   Pour over chocolate mixture; stir just until combined.
9. 9
   Sprinkle chocolate chips, and marshmallows (optional) and walnuts (optional) over batter; stir to combine.
10. 10
    Drop by heaping tablespoonful about 2 inches apart onto parchment paper-lined or ungreased rimless baking sheets.
11. 11
    Bake, 1 sheet at a time, in centre of oven for 10 to 12 minutes or until firm around edges but still soft in centre.
12. 12
    Let firm up on pan on rack for 5 minutes; transfer cookies to rack to finish cooling.