Preheat oven to 350 degrees. In a large mixing bowl, cream together softened butter, shortening, brown sugar and granulated sugar until light and fluffy. Add eggs, vanilla, and peppermint extract. In a separate bowl, combine baking powder, baking soda, salt, flour and cocoa powder. Add to the butter/sugar mixture and combine. Fold in chocolate chips. Chill dough in the refrigerator for 30-60 minutes to avoid cookies from flattening.
After your dough has chilled, drop by rounded tablespoons onto an ungreased cookie sheet. Bake for 8 minutes or until set up but the centers are still soft. Let the cookies cool for 1-2 minutes. Top each cookie with an unwrapped Candy Cane Kiss. Allow to cool long enough for the Kisses to harden.