01 - Wash the oranges thoroughly under running water. Using a sharp knife, slice off the top and bottom of each orange. Score the skin into four vertical sections and carefully peel away the rind, keeping a thin layer of white pith intact for texture.
02 - Slice the peeled rinds into uniform strips approximately ¼ inch (0.5 cm) wide for even candying and a polished appearance.
03 - Place the orange strips in a saucepan and cover with cold water. Bring to a rolling boil, then drain completely. Repeat this blanching process two additional times to draw out excess bitterness from the pith.
04 - In a clean saucepan, combine the granulated sugar and water. Stir over medium heat until the sugar fully dissolves and the mixture is clear.
05 - Add the blanched orange peels to the syrup. Simmer gently, uncovered, for 45 to 60 minutes, stirring occasionally, until the peels appear translucent and feel tender to the touch.
06 - Using tongs or a fork, lift each peel from the syrup and transfer to a wire rack set over a sheet of parchment paper. Allow to air-dry at room temperature for at least 2 hours, or ideally overnight, until the surface is no longer tacky.
07 - Place the chopped dark chocolate in a heatproof bowl set over a pot of gently simmering water, ensuring the bowl does not touch the water. Stir occasionally until the chocolate is completely melted and smooth.
08 - Dip each candied orange peel strip halfway into the melted chocolate, allowing the excess to drip back into the bowl. Arrange the dipped peels on a parchment-lined baking tray.
09 - Allow the chocolate coating to harden completely at room temperature, or place the tray in the refrigerator for 15 to 20 minutes to speed up setting.
10 - Once fully set, transfer the chocolate-covered orange peels to an airtight container. Store in a cool, dry place for up to 2 weeks.