1 cup water
2 cups granulated sugar
2 tablespoons agar-agar powder
Food coloring, optional
Flavoring extract, optional
Combine the water and agar-agar powder in a saucepan
Bring to a boil over medium heat, stirring until fully dissolved
Add the sugar and stir until dissolved
Boil gently for 2 to 3 minutes
Remove from heat
Add food coloring or flavoring, if using
Pour the mixture into a shallow lined dish or silicone mold
Let it cool at room temperature until firm
Unmold or cut into crystal shapes
Place the pieces on a tray
Let them dry at room temperature for 3 to 7 days
Turn the pieces occasionally for even drying
Store in an airtight container once the outside is firm and slightly crunchy