Preheat oven to 350 degrees. Cream butter, sugar and brown sugar until completely blended. Beat in one egg at a time, until well blended. Beat in one egg at a time until combined. Stir in vanilla. In a seperate bowl, combine flour, baking powder, salt & cocoa. Add the dry ingredients to the butter mixture, beating until combined. Fold in the Peppermint Bark Baking Bits. Drop dough by rounded tablespoons onto a lightly greased cookie sheet. Bake for 12-14 minutes.