One of the famous desserts for Samut Prakan is Khanom Jaak. I quite often see them selling it down by the market near the jetty for the cross-river ferry. The dessert is prepared inside the leaves of a nipa palm and then roasted over a charcoal fire.
Like anything, there are local variations, but here is a recipe that I managed to get hold off from a local person:
Sticky rice flour (1.5 kilos)
Palm sugar (half a kilo)
2 Shredded coconuts
Salt (2 teaspoons)
As you can see from the pictures, the mixture is spooned onto the leaves of a nipa palm which is then joined together with toothpicks. It is then roasted over a charcoal fire.
A bundle of khanom jaak costs about 20 baht. Now you know what it is, try some the next time you are in Thailand.
Don't forget to visit the forums to discuss Thai food!