Gather your ingredients.
I used Peppermint Extract since it tastes good and is pretty clear, so it won't alter the desired color of the finished product.
Line a baking sheet with foil and spray the foil with nonstick cooking spray. The smaller the pan, the thicker the rock candy. Large pans will make a thin sheet of rock candy.
I added the two teaspoons of flavoring extract with the two drops of food coloring to have it ready for later.
You will also need a Candy Thermometer, I used a $10 off coupon at Sur La Table to get this one for $5. Bed Bath and Beyond also has similar ones.
In a medium saucepan, combine the water, corn syrup, and granulated sugar.
Place the pan over medium-high heat, and stir until the sugar dissolves.
Bring the mixture to a boil, then stop stirring and insert a candy thermometer.
Cook the candy without stirring until it reads 285 degrees Fahrenheit, then take the pan off the heat. Note: A lower temp produces sticky candy, while a higher temp produces green candy.
Let it sit for a few moments, then add the flavoring and 2 drops of food coloring, and stir everything together. Note: the candy starts to get hard quick and the mixture makes a strong vapor.
Pour the candy onto the prepared baking sheet and tilt it so that it runs into a thin layer. Let it set completely at room temperature.
After it sits for a while, you can easily remove it from the foil.
Now you can, break it into small pieces.
I wrapped the pieces in the same foil and then hit it with a meat tenderizer.
You can keep breaking it up to your desired size.
Store the candy in an airtight container or zip-lock bag at room temperature. Now you "Breaking Bad" fans can open up a "Los Pollos Locos" and use it as a front to mass produce "Blue Sky" Rock Candy!