Homemade Rock Candy

Step 1
Roll the edges of two 16-inch squares of heavy-duty aluminum foil to form a rim around the outside. Generously sprinkle confectioners' sugar onto each square.

Step 2
Heat sugar, corn syrup, and water in a large, heavy saucepan over medium-high heat, stirring constantly, until sugar dissolves and mixture is boiling, about 5 minutes. Stop stirring and boil until a candy thermometer reads 300 to 310 degrees F (149 to 154 degrees C), about 25 minutes.

Step 3
Remove from the heat and stir in cinnamon oil and food coloring. Pour hot mixture onto the prepared foil and allow to cool and harden, about 45 minutes. Crack cooled candy into pieces.