My mum used to make these alot when my brother and my primary classes had end of year parties and was always a hit with kids and teachers alike. Oysters are basically little cakes with jelly, coconut and cream. I hope you all like them, feel free to comment and post pictures :)
The quantities of ingredients really depends on how many you make. You can also make the cakes from scratch if you have a nice recipe. I have never tried this using chocolate cake or any other jelly flavors but I'm sure any combination would be nice.