A few things came together in my mind one day and I decided that it would be a cool idea to make fluorescent chocolate. I haven't seen it anywhere before and wondered if it would be possible whilst making it natural, edible and more importantly taste good.
I knew that chlorophyll from plant leaves is fat soluble so I started with infusing cocoa butter with different sources of chlorophyll like green tea, mint tea and chlorella. The best option is mint tea in tea bags so you can remove all of the particulate matter. The chlorella is a powder and takes a long time to settle out and is slow to filter. Green tea doesn't seem to have that much chlorophyll so it wasn't as bright. Extraction into cocoa butter lead to a greenish cocoa butter which fluoresced orange under UV light. First step achieved!
I then investigated infusing turmeric into cocoa butter. The curcumin in turmeric is fat soluble and fluoresces brightly. This worked outstandingly well, the turmeric easily settled out and the cocoa butter was a very bright yellow in normal light and then highly fluorescent yellow under UV. One other source of natural UV visible compounds is cinchona bark which contains quinine, which has a bright blue fluorescence; think tonic water.
The next stage was to transform the infused cocoa butters into chocolate and see if the chocolate maintained the bright fluorescence. I chose the very bright turmeric infused one to begin with and it worked very well in a white chocolate formulation. I ended up making a bunch of different things with the tempered chocolate but by far the most effective were the little poison arrow chocolate frogs I made using the turmeric white chocolate and a black malt chocolate that I had previously made. This is a very visual product so check out the pics. I am in the process of turning the chlorophyll infused cocoa butter into chocolate and am trying to get hold of some cinchona bark to try and make a fluorescent blue chocolate.