Can anyone please help me with a recipe to make the glow in the dark icing for cupcakes. I saw a recipe saying you must use Tonic Water - but it does not work. Any other ideas? Thanks.

FoodSnots.com has a whole blog post about it... It only works with white icing... though they give a method for doing lightly colored icings... And I believe it only glows under a blacklight...

I dont think anything will glow in the dark like the stars some put on the ceiling as children...

Most glow in the dark chemicals are NOT edible.

The one that is (quinine) is very bitter and works best when dissolved in something that has water, like jello or pudding NOT icing. It glows blue so you can get green or purple but not pink or yellow.

According to "The Big Book of Hacks" (which also mentions quinine), one of the B-vitamins is also fluorescent.

Fluroescein is not considered toxic in normal amounts, but it's listed as an acceptable artificial coloring for drugs and cosmetics, not for foods, and it can produce strong allergic reactions, up to and including anaphalaxis.

As to phosphorescence, while there are plenty of phosphorescent phosphors that are approved for use in children's toys, and in cosmetics (e.g., Halloween make-up), I'm not aware of any that constitute "good eats." Ditto for chemiluminescent and bioluminescent materials.

Ironically, white phosphorus (which is extremely toxic by ingestion and inhalation, and burns skin on contact -- definitely NOT "good eats") doesn't glow by phosphorescence, but by chemiluminescence, and more specifically, from oxidation.