01 - Line an 8x8-inch square baking pan with parchment paper and lightly oil the surface.
02 - Sprinkle gelatin over 1/2 cup cold water in a small bowl and allow to bloom until softened. Set aside.
03 - In a saucepan, stir together orange juice, orange zest, 2 cups granulated sugar, corn syrup, and 1/4 cup water. Heat over medium, stirring until sugar dissolves.
04 - Increase heat and bring mixture to a boil. Cook until mixture reaches 240°F on a candy thermometer (soft-ball stage), about 10 minutes.
05 - Remove saucepan from heat. Immediately add bloomed gelatin and stir until completely dissolved and smooth.
06 - Pour hot mixture into the prepared pan. Allow to cool at room temperature until fully set, about 2 to 3 hours.
07 - Once firm, lift candy slab from pan and cut into bite-sized squares or desired shapes using a sharp knife.
08 - Toss each candy piece in extra granulated sugar to coat. Store in an airtight container with parchment layers if needed.