Gather a saucepan, a candy thermometer, a heat-resistant spatula, and a baking sheet lined with parchment paper.

In a saucepan, combine sugar, light corn syrup, and water. Stir the mixture gently over medium heat until the sugar dissolves.

Attach the candy thermometer to the saucepan, ensuring it does not touch the bottom. Bring to a boil and cook until the mixture reaches hard crack stage (about 300°F or 150°C), which usually takes about 10-15 minutes.

Remove from heat and carefully add black food coloring, stirring well to achieve the desired coal appearance.

Quickly pour the mixture onto the prepared baking sheet and spread into a thin layer. Allow it to cool completely at room temperature for about an hour.

Once cooled, break the candy into chunks resembling lumps of coal or shape them with your hands for a polished look.

For extra flair, sprinkle edible glitter over the top of the still-warm candy.