"Come to the Dark Side, we have cookies." Because it turns out, powering the dark side burns a LOT of calories. Cookies are actually a necessity , and really help when suffering from blood loss.
So obviously, rage-machine-with-a-murder-boner Kylo Ren has to carry a baggy of cookies with him everywhere he goes.

HARD MODE: Ren actually HATES the cookies he has to eat - he's on a strict athletic diet (abs don't shred themselves), so the cookies are more like overly-sweet vitamin disks...