Preheat the oven to 350˚F.
In a large bowl, beat together the butter, brown sugar, white sugar, milk and vanilla until fully combined. Beat in egg.
In a medium bowl, mix together the flours, salt and baking soda. Slowly mix into the wet mixture until fully incorporated.
Fold in 1/2 cup crushed candy canes. Shape into 1-inch balls and place 2-inches apart on an ungreased baking sheet.
Bake for 8 to 10 minutes or until lightly browned. Remove to rack to cool completely.