[flir]

I tried this in the early 90s off the back of a short article in Scientific American about chocolate holograms which was almost certainly about the same company. It worked, and I think it would have worked a lot better if I knew more about tempering chocolate.

It struck me at the time that using holographic foil as a mould would be the natural next step.

I've got a vague memory of a chocolate record being made as an art project? The needle abraded the surface so it wasn't really playable more than once.