How a dormant grudge awakened.

Black Pearl Cookie, a Cookie transformed from extreme hatred and malice toward Cookie has gone out of her way for destruction, she starts to contemplate doing it after meeting a very late acquaintece, but afterwards, her malice erupts to levels of genocide. Will she succeed in her goal, or end up choosing peace over destruction?
The Cookies in this story are more humanoid, for violence purposes. Hopefully anatomy is good.
This story gets really dark at times, but to make it specific, chapter 5 mentions something really, really bad. You will have been warned when that comes out.