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.
If the heat is too high, the sugar mixture will caramelize and turn brown.
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.
Carefully mix in a few drops of food coloring to create a stained-glass appearance.
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.
Use a pin to pop any bubbles so the glass has a smoother and more convincing texture.
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.
The first nuclear bomb test in New Mexico created a crater 800 yards across and melted the desert sand into a gray-green glass shell called trinitite.