Cookie Dask is one of the many Dask clones created by the Combinatron. He was created by fusing Dask as a base with one of many materials, in this case cookies.
Cookie Dask has a split personality. One second he's a sweet creature that is loved by all. The next he's a crazed psychopath that will kill us all!! There's no telling when he will switch, either. Cookie Dask is likely the second-weakest Dask clone, behind Stupid Dask, and he can only emit good fragrances. That's it, really. For some reason, he likes toast.
After Creation
To begin with, Cookie Dask was quite nice, and very friendly, too. Well, until people started trying to eat him. He shrugged it off at first, until one day he snapped and killed anyone that got near him. He now switches between the two randomly. Befriending him is still perfectly fine. Just don't get too close...