DAIRY FREE: use dairy-free chocolate chips; my favorite DF brand is
Enjoy Life.
If your dough is sticky, I recommend chilling it for 5-10 minutes before rolling & baking; this also keeps the cookies from spreading. Alternatively, I throw my bananas in the fridge about an hour beforehand -- then, when you mix them into the dough, it has a similar effect and you likely won't even need to chill your dough.
Feel free to replace the chocolate chips with walnuts (if you're into that kind of thing).