I had a dream last night that I actually ate one of these. I was hired by someone and they sent me to a separate room. In this room were KK donuts, patties, and hamburger buns.
Much like this image:
I started eating the burger with the regular bun, and noticed the KK donuts so I cut one in half, and placed the pattie in between.
I never thought I'd actually dream of the stuff I read here