Kuih koci is that little black or green pyramid wrapped in banana leaf, with a soft glutinous skin around a sweet coconut and gula melaka filling. It is the heavyweight of the everyday kuih at around 175 calories, because coconut shows up twice, in the dough and in the inti (filling), on top of the palm sugar.
One is a satisfying treat. The pulut hitam (black glutinous) version is about the same. Just know this one is denser than the pretty layered kuih next to it on the tray, so one koci is plenty.