How to Make Sugar Glass

If the wonders of rock candy have lost their charm, this guide will turn that sweet candy confection into a clear pane or stained-glass work of art.

You will need

  • 2 c. water
  • 1 c. corn syrup
  • 3 1/2 c. white sugar
  • 1/4 tsp. cream of tartar
  • Candy thermometer
  • Sheet pan
  • Nonstick cooking spray
  • Silicone baking mat
  • Food coloring (optional)
  • Pin (optional)

Step 1 Combine ingredients Combine the water, corn syrup, sugar, and cream of tartar in a large saucepan. Stir to combine them and heat them slowly over low heat.

Step 2 Heat to hard-crack stage Use a candy thermometer to bring the mixture up to the hard-crack stage — around 290 to 300 degrees Fahrenheit.

Step 3 Spray sheet pan Spray a sheet pan liberally with a nonstick cooking spray or use a silicone mold if you have one.

Step 4 Pour the sugar mixture Pour the mixture into the pan quickly and evenly as it will start to set as soon as it is removed from the heat — be careful and avoid being burned.

Step 5 Shake the pan or mold Shake and tip the pan to get even coverage and to level the mixture. Wait an hour for the candy mixture to cool completely.

Step 6 Remove glass Remove the sugar glass from the pan by dragging a hot knife along the edges and then prying it up. A silicone baking mat should fold back and release more easily.

Step 7 Refrigerate until ready Refrigerate the sugar glass until it’s ready to use. Enjoy your prop glass while it lasts.