I bought a brain-shaped jelly mould a couple of years back and it’s always great to use for a bit of Halloween desert, although it can be a little off-putting at times.
I found a video on Youtube where a guy has used the same type of mould to do something a little more creative.

I don’t personally think that the result are amazing, but with a little more time and care, you could probably use the same technique to good effect.

As an alternative, you could skip the DIY, and go for something like this:

I have only been able to find it being sold in the US, but if you live there, it would probably even work out cheaper!