How to Make Rock Candy

4.47 from 102 votes

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!).

Prep Time10

Cook Time10

Total Time20

Course: candy, Dessert, Snack

Cuisine: American

Servings:

½ cup water 114 grams
¾ cup light corn syrup 234 grams
2 cups granulated sugar 400 grams
2 teaspoons flavoring extract 8 grams (I chose raspberry, but there are lots of flavors to choose from!)
Food coloring optional (I used blue, but use any color!)

Mix all ingredients together in a medium saucepan set over medium heat.
½ cup water, ¾ cup light corn syrup, 2 cups granulated sugar, 2 teaspoons flavoring extract, Food coloring
Stir until boiling. Once the liquid begins to boil, do not stir until finished.
While the candy comes to a boil, line a baking sheet with aluminum foil and spray the foil with nonstick spray. Set aside.
Once boiling, place a candy thermometer in the liquid and monitor closely. when the liquid reaches 300°F, take off the heat and set aside.
Allow the mixture to cool until the bubbles quit breaking at the surface of the liquid.
Pour liquid onto the prepared baking sheet.
Allow to cool until fully hardened. Then, break apart to the size desired.

Storage: Store rock candy in an airtight container at room temperature for up to 1 month. Keep away from heat and humidity.