How to make your very own Rock Candy at home

DIY Rock Candy!

Who knew that making such beautiful, tasty, sugary Rock Candy at home would be so easy and FUN! It also doubles as a bit of a Science Experiment too!

Using only 3 ingredients, the goodies made from this fun ‘experiment’ can be used for kids parties, wedding favours or just a fun treat!

Now I wanted to make a HUGE batch of these for my son’s party, but you don’t need to make the amount I did! The general rule of thumb is 2 – 3 cups of sugar to 1 cup of water. I ended up using 10 cups of sugar and 4 cups of water. I will give you the basic recipe and you can double it, triple it, whatever you like!

You will need:

2-3 cups white sugar

1 cup water

Food colouring

Flavouring (optional) I had some ‘Bubblegum Essence’ so I used that

You will also need:

Jars/champagne flutes



Large saucepan


DIY Rock Candy!

Add your water to the saucepan and bring to the boil

Start adding the sugar a 1/2 cup at a time, until it no longer dissolves (making a saturated sugar solution). The more sugar you add, the longer it will take to dissolve. Be patient and try to get as much to dissolve as possible.

DIY Rock Candy!

Add a few drops of your flavouring.

Take your mixture off the heat and allow to cool – approximately 15 minutes.

DIY Rock Candy!DIY Rock Candy!DIY Rock Candy!

While you are waiting, take a plate and add some sugar to it. Get your skewers and dip them into the liquid sugar mixture then dip it into the plain sugar to coat the stick. This will give your Rock Candy something to ‘grow on’. Let them dry for a few minutes until they are completely dry – if they are still too wet when you put them into the hot sugar solution, all of the sugar coating will fall off, and the new crystals will have nothing to grow on.

DIY Rock Candy!

Set out your champagne flutes/jars and add a few drops of food colouring to the bottom of each.

DIY Rock Candy!

Carefully add the sugary solution to each glass/jar and give it a little stir. I happened to have a baster on hand which made this task much easier, but you could use a gravy boat, funnel or small cup.

DIY Rock Candy!

Take your sugary skewers & place a peg at the top of each and place into the glasses (make sure they do not touch the bottom or sides as this will hinder the ‘growing process’.

DIY Rock Candy!

Now it’s time to be patient. The crystals will start growing in 2 – 3 days, but depending on how big you want your Rock Candy sticks will depend on how long you will need to keep them in the glasses (we let ours grow for 2 weeks). The kids loved checking in on the candy to see how much it had grown each day!

DIY Rock Candy!

We also used a food cover to cover the glasses to stop any nasties venturing in!

When you are ready to remove them, gently break the top with a butter knife or other sharp object. Gently remove the skewer and hang it upside down until the excess liquid drips off and it dries. You can pour out the liquid from the glass and use the glass to hang the skewer and catch the excess liquid.

DIY Rock Candy! DIY Rock Candy! photo 4 DIY Rock Candy!

Ta Da! Beautiful, home grown rock candy!

You may also like some of our other Fun Science Ideas:

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