Rock candy is made from pure sugar.
Rock candy is a candy made from large pieces of sugar that are grown on a string or stick. Because it’s made from pure sugar, this candy will be naturally clear and extremely sweet. It can be consumed alone, dissolved in sugary drinks or as a dessert garnish. As the candy making process is very simple, many people like to make it at home and some teachers use it to illustrate crystal formation for young students.
Excessive consumption of sugary substances like rock candy can cause cavities.
To make rock candy, water and sugar are combined to form a supersaturated sugar solution. The solution is so rich in sugar that no more sugar can dissolve in it, causing the added sugar to sink. A substrate for crystal growth, such as a stick or string, is placed in the solution and left undisturbed for a few days to a week, allowing crystals to form on the substrate as the water evaporates. When the substrate is removed, it becomes covered with very large and irregular sugar crystals.
Many people add food coloring to their rock candy to make it more visually interesting. Flavorings can also be added, for people who want to try something other than pure sugar. Bars of this type of candy are often found in candy stores, by the sea and similar vacation spots. Candied sugar is also sold in bulk for use in restaurants as a decorative garnish.
To make mints, bring a cup of water to a boil and add two cups of sugar, stirring constantly and bringing the mixture back to a boil. These values can be easily increased or decreased if desired, as long as the same ratio is maintained. Once the sugar has completely dissolved, pour the water into a jar and dip a string or glue it into it. If you want to add color or flavor, do so after the sugar has dissolved, but before pouring it into a pitcher. When the rope is saturated, pull it out and let it dry. This will create seed crystals, allowing the sugar crystals to be larger and more uniform.
Once the toothpick or string is dry, dip it back into the pot of dissolved sugar and let it sit until large crystals form. Try to avoid moving or pushing the flask, as this can interfere with crystal formation. Once large, uniform crystals form, the candy can be removed from the jar and served or wrapped in parchment paper for later consumption.