Step 1

Grease your cookie sheet with vegetable oil. Set it close by the stovetop on a flat surface.

Step 2

Place a heavy saucepan on your burner. Add the granulated sugar, corn syrup and water. Turn the burner up to medium heat.If your burner runs cool, use medium high heat.

Step 3

Clip your candy thermometer to your saucepan. The tip should be submerged inside the syrup mixture.

Step 4

Stir continuously. The sugar mixture should reach boiling.

Step 5

Keep the mixture boiling. It should boil until it reaches 310 degrees Fahrenheit (154 Celsius). Be patient, since achieving this temperature can take a while.It is essential that the candy reach 300 to 310 degrees, which is considered “hard-crack.” At this point the sugar will change consistency.