01 - Line an 8x8-inch square baking pan with parchment paper and lightly oil the surface.
02 - In a small bowl, sprinkle gelatin over 1/2 cup cold water and allow it to bloom until softened. Set aside.
03 - In a saucepan, add orange juice, orange zest, granulated sugar, corn syrup, and 1/4 cup water. Stir over medium heat until the sugar completely dissolves.
04 - Increase heat and bring the mixture to a boil. Using a candy thermometer, cook until it reaches 240°F (soft-ball stage), approximately 10 minutes.
05 - Remove the saucepan from heat and immediately stir in the bloomed gelatin until fully dissolved and the mixture is smooth.
06 - Pour the hot mixture into the prepared pan and let cool at room temperature until completely set, about 2–3 hours.
07 - Once firm, remove the candy slab from the pan and cut into small squares or desired shapes with a sharp knife.
08 - Toss each piece in extra granulated sugar to ensure an even coating. Store in an airtight container, layering with parchment as needed.