In a small bowl combine flour, salt, and baking powder. Set aside.
In a medium bowl or stand up mixer stir together cocoa powder, sugar, applesauce, oil, extracts, and peppermint candies (if using) until well blended. Add flour mixture and mix until just combined.
Wrap the dough in plastic wrap and chill for 2 hours.
Preheat the oven to 350 degrees F. Line two baking sheets with parchment paper. Place the granulated and powdered sugars in two separate bowls.
Remove chilled dough and roll into balls about one tablespoon each. Toss first in the granulated and then second in the powdered sugar, coating fully.
Bake for 12-13 minutes (cookies should be slightly underbaked). Remove from oven and allow to cool for 2-3 minutes before transferring onto a wire rack to cool completely.