I think I find the 'cinnamon eyes' badfic cliche even more irritating than chocolate, though in both cases I am dubious about associating eyeballs with food. Not being a raven, I find the idea of nibbling eyes a bit icky.
But in any case: chocolate comes in a wide variety of shades, and yes, some of them are rather close to the colour of dark eyes.
Never met anyone who's eyes were cinammon coloured, though, and I find it hard to imagine it would be attractive. You might as well call them 'rust coloured' and be done with it!