01 - Line a baking sheet with parchment paper or a silicone baking mat.
02 - Place the semi-sweet chocolate in a heatproof bowl and melt gently over simmering water (double boiler) or in the microwave in 30-second intervals, stirring until smooth.
03 - Dip each pretzel rod about two-thirds into the melted chocolate, allowing excess to drip off.
04 - Place dipped pretzels on the prepared sheet and sprinkle lightly with flaky sea salt while the chocolate is still wet.
05 - Melt white chocolate using the same method and drizzle over the chocolate-coated pretzels for decoration.
06 - Let pretzels set at room temperature for 30 minutes or refrigerate for 15 minutes until firm.
07 - Store set pretzels in an airtight container at room temperature for up to one week.