Rock Candy

"Rock Candy"
photo by a user photo by a user
Ready In:
1hr 45mins
3 jars


  • 1 12 cups water
  • 6 cups sugar, divided
  • food coloring (optional)
  • candy flavoring
  • 3 lengths of string (6-inch)


  • * Candy flavoring is carried by a lot of grocery stores, near the baking aisle with candy-making and cake decorating supplies.
  • Bring the water to a boil in the saucepan.
  • Remove from heat; add 3 cups of sugar, stirring until dissolved.
  • Slowly add the remaining sugar, reheating the water if necessary.
  • When all the sugar is dissolved, pour the mixture into 3 heat proof jars or glasses.
  • Stir 3 drops of liquid food coloring and 1/2 teaspooon candy flavoring into each jar.
  • Tie each length of string around a pencil.
  • Lay one string on top of each jar so the strings hang down into the liquid.
  • Crystals will begin to form in 1 hour, and continue to solidify for several days.
  • If a layer forms on the surface of the jar, break it.
  • When liquid completely evaporates, candy is ready.

Questions & Replies

Got a question? Share it with the community!


  1. hey, we did this in 6th grade science class! but there is something you can do to mess it up, it's very simple but i cant remember what it is. i've also done this with my nieces. fun for kids with a little patience
  2. I had my niece and nephews over and we decided to try out hand at making this. The kids had fun mixing the colors and I had fun showing them what to do. They each went home with a baggie full of candy. I thought their mothers were going to kill me for making them all sugar candy, but I look at it like this...It was something memorable for us all to do together and we all had fun!
  3. This was tasty and easy to do, though I moved the string too soon and it didn't come out of the heat-proof canning jars I used. I then had to chip it all out to get at the candy. The next batch I made I used flat, greased pans. Then as it cooled, I poured it onto wax paper. They didn't make long chunks of candy but individual crystals. That was fine with me because I was looking for a space rock kind of looking candy and that's what I got. I also colored the candy with food coloring for a cool effect. Neato!


I'm just a person who likes to eat.
View Full Profile

Find More Recipes