Paige Grandjean's Peppermint Rock Candy is the holiday treat that makes for a fun at-home science project—the sugar crystals grow over the course of a few days into stunning glacier-like structures.

Making rock candy is a great way to watch crystals form in real time. It's also an exercise in thermodynamic equilibrium. Also, you can eat it. What's not to love?

Old-fashioned rock candy is a sweet and simple treat that evokes nostalgia. ... but it can take from five to seven days to develop the crystals that make rock candy an aesthetically pleasing treat.

Bring water to boil and start adding sugar, one-quarter cup at a time, until it no longer dissolves. The more you add, the longer it will take to dissolve.

If you don't have a candy thermometer or faith in your ability to not burn yourself, buy rock candy here, in bulk. * There is no shame in making this yourself if you are an adult. It's tasty and ...

How to Make Candy Magic at Home. The F&W guide to transforming sugar into this season’s most crackly, chewy, creamy, and covetable treats.