Introduction: Heisenberg's Old Timey Blue Rock Candy

Picture of Heisenberg's Old Timey Blue Rock Candy

What you'll need:

3¾ cups of granulated sugar
1 cup of water
1¼ cups of light corn syrup
1 teaspoon of blue food coloring
1 teaspoon of vanilla extract
Large baking pan
Aluminum foil
Small food storage bag I used 3"x4" (from Micheal's)
Candy thermometer

Put water and corn syrup into sauce pan and heat on medium high and slowly add granulated sugar. Bring to a brisk boil and cover. Let mixture boil for 3 minutes covered.

While this is boiling, line your baking sheet with aluminum foil and spray with non stick cooking spray.

After these 3 minutes were up I tested the temperature and it was somewhere around 230 degrees. Turn the heat up until you can get the mixture to around 300 degrees. Stir in your food coloring and add any flavoring you desire, I used vanilla extract. Remove from the heat and wait for mixture to stop bubbling. Remember stir this stuff often.

As soon as the bubbling stops pour into your prepared baking pan. Put this somewhere out of the way for 2-3 hours hours to cool.

When the mixture is cool and ready to be bagged you will be able to touch it with out it sticking to your finger. Use the back of a metal spoon to break it up and put small amounts on a piece of paper folded in half to funnel it into your bags.

As an added touch I used Gimp to make the labels using the following tutorial (not mine)

I think this recipe ended up making somewhere around 45 bags of rock candy.


Mixture turns brown and has a burnt smell to it. You allowed it to get to hot and or forgot to stir often.

Mixture never sets, is always gooey to the touch. More than likely you did not allow if it to get to the right temperature of 300 degrees.


Mr Rancher made it! (author)2014-10-25

Took a bit of time to finally get to 300, but once I did I let it stay there for just one minute, then took it off the fire. Also, anyone reading this, I never stopped stirring mine once I uncovered it. And I ended up not burning any of it.

This worked GREAT. The candy came out awesome.

In my photo, it looks discolored, but that is a combination of my old pan and the cooking spray. The candy itself came out a brilliant blue.

Thanks so much for the post.

zoachshe (author)2014-06-15

Hey, the candy hardened and set last night, but this morning it was a little soft again. Any help?

knexinventer (author)2014-03-11

How many people would one batch serve if everyone got an equal amount?

gdhenson (author)knexinventer2014-03-12

This batch made 45 bags, about 1oz each.

knexinventer (author)gdhenson2014-03-12

Thank you. I am going to make a glowing batch for one of my classes.

mjones73 (author)2013-10-12

putting the pan in the oven for the last few degrees seems to have worked fine, cracked up beautifully...

mjones73 (author)2013-10-11

FYI, I used a gas stove and was only able to get to about 280F. so I cranked up the oven to around 400F and put the pan in the oven for about 6 min. before the candy thermometer read 300F. seems to be setting up well. will keep you posted.

gdhenson (author)mjones732013-10-11


poofrabbit (author)2013-09-17

Congratulations on your runner up prize win in the play with you food contest!

gdhenson (author)poofrabbit2013-09-18

thank you

groovymama (author)2013-09-02

I love this!

gdhenson (author)groovymama2013-09-06

thank you

ravenking (author)2013-08-26


kmelamdowitz (author)2013-08-14

Is that 300 degrees centigrade or fahrenheit?

gdhenson (author)kmelamdowitz2013-08-14

Fahrenheit - sorry about that mate

Hiyadudez (author)2013-08-06

Too awesome! Would be a little better if the blue was a bit brighter, but cool nonetheless.

astrofolk (author)2013-08-05

@Kiteman: It's a reference to the show Breaking Bad, whose main character Heisenberg makes meth.

blkhawk (author)astrofolk2013-08-06

I love the show! Breaking Bad and Sons of Anarchy are the best!

M3G (author)2013-08-06

Hahaha cool idea!

gdhenson (author)M3G2013-08-06


Kiteman (author)2013-08-05

Sounds nice.

(What's the story behind the title?)

About This Instructable




Bio: Software QA Test Engineer/Technical Writer
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