How to Make Rock Candy (Blue Rock Candy Recipe)

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Rock Candy is such a fun treat to make and eat for holidays, parties, or any fun occasion. Learn how to make rock candy at home (fast!) for something special you can make with the family. I chose to make a blue raspberry candy, but you can make any color or flavor you like with this easy homemade rock candy recipe!

pieces of rock candy in a bowl

Rock Candy Recipe

Learn how to make rock candy at home for parties, holidays, and special occasions. Such a fun thing to make with the family!

Making rock candy is surprisingly easy! I never thought I’d end up making my own candy, but this little DIY was so much fun. I wanted to make blue candy in honor of the Breaking Bad finale, and this recipe was just the thing.

It’s so simple to make a sheet of this hard candy, then smash it up into pieces. You can make larger pieces, or crush it up small, so it looks more like traditional rock candy. Really easy either way!

I made blue raspberry candy (which is a great flavor/color combo), but you can choose literally any color or flavor you want with this rock candy recipe. Follow the same simple method, and add in your preferred flavor extract and food coloring. 

Making this rock candy at home is such a fun experience, and it makes a really cool party treat! Both kids and adults love this stuff!

sheet of blue rock candy

pieces of shattered blue candy

Homemade Blue Rock Candy

This homemade rock candy recipe doesn’t require days of letting sugar crystals form around a stick…that sounds really cool, but we don’t have time for that!

This is a much faster way of making rock candy. We’re making sheets of hard candy (think jolly ranchers), then we can smash it and break it up into pieces however we want. 

It’s so fun and so delicious. Plus it’s just quick and easy!

What is rock candy made of?

  • Water
  • Sugar
  • Light Corn syrup
  • Flavoring Extract (any flavor you want)
  • Food Coloring (any color)

Blue Raspberry Candy

I chose to make blue candy this time, because I made it for the Breaking Bad series finale. It fit perfectly with the theme of the night and it was so fun! I also thought raspberry would be the perfect flavor.

You can choose any color and flavor combination you like!

  • Make green candy for St. Patty’s Day (with a lime or sour flavor).
  • Make orange and black rock candy for Halloween parties.
  • Make red strawberry candy for summer days.
  • Or just make your favorite flavor and color combo!

step by step photos how to make rock candy

How to Make Rock Candy

This easy recipe shows you how to make rock candy sheets in about 20 minutes. It’s a fast way to make it, and you can make any color or flavor with this method.

Here’s a quick overview (check the recipe card for full details):

  1. Mix together all of the ingredients.
  2. Heat on the stove, stirring until it boils.
  3. Once it starts to boil, STOP stirring, and wait until the temperature reaches 300°F (you’ll need a candy thermometer for this).
  4. Remove from heat and let it cool just until bubbles stop breaking at the surface.
  5. Then pour it onto a baking sheet (lined with foil and non-stick spray), and let it cool completely.
  6. Once it has cooled and hardened (takes about 30-45 minutes), you can break it apart and eat!

pieces of blue rock candy

close up on pieces of blue hard candy

Making Rock Candy (Top Tips!)

Here are some helpful tips on how to make rock candy at home.

How long does it take to make rock candy?

With this method, making rock candy takes only 20 minutes, plus cooling time (usually 30-45 minutes for it to harden).

How do you break up hard candy sheets?

  • To turn the sheet of hard candy into small pieces, it’s easiest to use a metal mallet (like a meat tenderizer). Just hit the sheet with it until it breaks into pieces.
  • If you want to make it look more like rock candy, place those pieces into a bag, and use a rolling pin to crush them up even smaller.

How do you stop homemade rock candy from sticking together?

Place the candy pieces into a resealable bag, pour in some powdered sugar, and shake it up to coat the candy. Do this before storing them, and they won’t stick!

How to store hard candy

The great thing about hard candy is that it really lasts! Well, assuming you don’t eat it all.

  • Place the candy in an airtight container to store it (try the powdered sugar tip above!).
  • Store it at room temperature, ideally in a pantry or cupboard where it’s slightly cooler.
  • You can keep it for weeks!

Why isn’t my candy hardening?

If your candy doesn’t harden, even after sitting for a long time (it should only take 45 minutes, not much longer), it might be that your liquid never got hot enough. 

It’s important that the temperature reaches 300°F while cooking the syrup. And the best (really only) way to make sure it gets hot enough is to use a candy thermometer to check.

a bowl of homemade rock candy

This was such a fun recipe to make! I can’t wait to make different colors and flavors for holiday parties, and it will definitely be a fun thing to make for kids’ parties.

See the recipe card for details on how to make rock candy. Enjoy!


Be sure to try these other fun homemade sweets and treats:



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