Hi, my partner and I are going to try WAM with a blacklight and the only thing i can think to do is using neon food colouring in icing/frosting/cake batter.

What are some other ideas/foods that will glow?

Tonic water glows under a blacklight.

The quinine in tonic water glows under uv light, make gunge or batter with that to have a safe/edible glowy slime!

Tonic water with quinine glows under blacklight. You could try using it as the liquid component of some gunge for a glowy, fizzly slop.

This is a great idea!

This year I throw a black light party.
Sorry if these aren't just substance ideas but I just thought it could help having a good time.
Here are some things I found out:

- There is nearly no edible food coloring which doesn't taste horrible in amounts needed for letting food glow.
- Quinine is the bitter tasting chemical which is in Tonic Water and Bitter. There are nearly no other edible things containing quinine, but you can buy that separately.
- Some energy drinks (I think Monster i. e.) glow under UV
- Amazon is selling black light body paint and clothing paint. Don't mix them up, letter won't be washed off easily but both are non-toxic.
- There is neon-duct tape, very cool to design the room.
- Definitely don't use the black light bulbs. Use black light fluorescent tubes (I suggest having two, from different sides). With Bulbs, everything won't fluoresce so bright as hoped for.
- Some merchants are selling fluorescent gunge powder. That really glows good.
- Make it completely dark, really, completely. Every bit of normal day light, even a small laptop screen will destroy the whole black light effect.
- Not everything in neon (or white) is glowing under UV! Best you grab a cheap ($10) black light key chain and take it to your shopping to test if the neon-thing you want to buy would really glow under black light!

So much for some ideas. Sorry to tell you that there really is hardly some edible thing glowing under UV. I hope I could help you!