Make homemade rock candy with these tips and tricks and answers to frequently asked questions. A fun science experiment and treat for kids!
Homemade Rock Candy is easy to make, it just takes patience. There are so many variations using string, sticks, etc. It’s a beautiful science project and sweet treat all in one. It does take time, and the end results can vary. We found that some colors grew really well and others didn’t grow as much. There’s a science to it and that’s all part of the fun! Scroll to the bottom for some frequently asked questions for making rock candy.
My son has a batch growing on our window sill right now as a little project for Cub Scouts. He used a string and didn’t color his sugar water, but the result is the same as the rock candy we made before. For us, it is more fun to watch the crystals grow than to actually eat it.
To make homemade rock candy on a stick, watch this video tutorial or scroll down for written directions! I’ve also included more tips and frequently asked questions at the end of the post.
- Sugar (lots of sugar)
- Food Coloring (concentrated for brighter colors)
- Wooden Candy Sticks or Bamboo Skewers
- Glass Jars
Note: We used 18-20 cups of sugar and 8 cups of water and it made a lot. So you can definitely half the recipe or create as little as you like as long as you keep the same sugar/water ratio. You are making a nice, sticky, sugary syrup. Mix until mixture starts to simmer. You do not need it to a rolling boil or bring it to a certain temperature with a candy thermometer. Easy.
It only takes 7 days to make homemade rock candy and it’s so much fun to watch and see the changes each day!
Frequently Asked Questions:
Can you make more than one stick of rock candy in each jar?
How do you drain the rock candy?
Do different colors grow faster than others?
How long will rock candy last?
Can I use a disposable foam cup for making rock candy?
Why didn’t my rock candy grow crystals?
Can you re-use rock candy syrup to make more crystals?
Here’s are a few more tips for making homemade rock candy:
- Make sure your glass/jars are clear and CLEAN.
- Make sure your sugar ratio is AT LEAST 2:1-3:1 When I said it will get to a point where it will not dissolve anymore, that does not mean that it will be gritty and super thick. It will still look like a clear syrup, but a little cloudy. That is when you will know that it is a saturated ratio. Just make sure you bought extra sugar so that if you get to a 2:1 or 3:1 ratio and it is still dissolving super quickly that you can add a little more.
- Place in a WARM, SUNNY location. I made this last batch in September when it was still 80+ degrees. I’m not sure if the time of year has anything to do with it or not.