does anyone know if fondant or buttercream or any other cake/edible material would glow in a black light at a halloween party? I was thinking it would be neat to create a birthday cake for someone that had glowing parts For someones birthday on halloween.

Tonic water glows under blacklight. If you add a little tonic water to your buttercream, or brush a little tonic water on your fondant it should glow under blacklight.

http://www.ehow.com/list_7222083_tips-cake-glow-black-light.html

you can add tonic water to clear piping gel as well

Thank you so much!! Im amazed and so excited to try this!!!

Here's an old thread on the subject: http://cakecentral.com/modules.php?name=Forums&file=viewtopic&p=6786753#6786753