Cookies are too sweet
You might be able to overcome the sweetness by adding a tart glaze to the cookies (lemon or lime), but I don't know how well that'll go with the chocolate chips.  Another option would be to crush them up to make a yogurt parfait (made with plain, unsweetned yogurt).

You might also consider some of the options mentioned in What can I use hard, crunchy, leftover cookie-mistakes for?