Making candy can be fun, but making candy that glows in the dark? I think that is super-fun.
This is a project you'll definitely need a partner to help with - because it involves high heat and dangerous hot sticky sugar that can burn you - and because this is the kind of fun that is best when shared.

Here's a list of tools and ingredients (I'll talk about substitutions later)

-250 g sugar
-A vitamin B2 pill (just ask in your pharmacy, or on (half a pill is enough)) (the one I used had 15mg per capsule and I used three capsules, don't use more than that, it will not enhance the effect)
-green food coloring
-mint oil (or any other type of oil to give your candy a nice taste)
-aluminium foil and/ or powdered sugar and quartz crystals (or something else to make the forms)
-UV light
-a small pot
-candy thermometer

Got everything? Great. I’ve included the steps below, or you can refer to my photo walkthrough here:

Step 1

First gather your ingredients: sugar, electric green food coloring, your favorite flavored oil, and the magic touch, vitamin B2 capsules to make them glow.
To make the candy you'll also need a stove, pot, candy thermometer, aluminum foil, quartz crystals to make the molds with, and rice to hold up the molds.
Before cooking, prepare your molds by covering the quartz crystals in aluminum foil, then carefully pulling the foil apart, leaving an impression.

Step 2

You can also make long strips of candy by folding the foil lengthwise and curling up the ends so the candy doesn't leak out.
Set your molds into the pan of rice to maintain their shape.

Step 3  

Dissolve three capsules of vitamin B2 in 150mL of water (5/8 cup), and measure out 1.25 cups of sugar.
Using your candy thermometer, mix in the sugar and B2/water mix until the solution gets to 200 degrees. Then stop mixing and wait for the temperature to reach 300.

Step 4  

Now it's time to work fast. Add your food coloring and flavoring and quickly stir, then start pouring your molds with a ladle.

Step 5

Wait until the candy has solidified, and carefully pull them from the molds.
Congratulations, you've made UV-sensitive Kryptonite candy. Hold them under a UV light for the best effect, and enjoy!

We’ll be talking more about glowing candy in a Hangout today at noon PST, so tune in. And don’t forget to take pictures of yoru candy before you eat it! 

Special thanks to those who taught me how to do this: +Becky Stern  and +Michael Colombo  (And the man who held my hand, +Nick Raymond )
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