• 
• 2 cups water
  
• 1 cup white corn syrup
• 3 1/2 cups sugar
• 1/4 tsp cream of tartar
• 1/4 tsp vanilla extract
• 3 drops of blue gel food coloring

I boiled the mixture and then continued stirring it on the heat until it reached 300 degrees F (used a candy thermometer to measure the temp). At that point, I poured it into a tray to cool. It hardened up in about an hour and then I smashed it to pieces. via reddit