Go for chabakia in the foodmarket on the Djemaa el fna. It's the only cake I've had the pleasure of encountering that you have to dunk into your bean soup. Such dunking is compulsory, and livens up an otherwise boringly healthy dish no end. We were reliably informed that chabakia is made of flour, rolled in lots of honey and sugar, and then fried, which sounds much more believable than it being starfish, as we first thought (not such a startling assumption as we were surrounded by diners merrily tucking into sheeps' heads and giant snails). It's the perfect, sticky cake to chew on while you give away your tourist credentials by drinking mint tea sans sucre and arguing with your boyfriend about whether or not to buy a Moroccan toy drum.
Djemaa el fna at the bean soup stall