Step 6: Garnish and Chill
If desired, sprinkle flaky sea salt, sprinkles, or chopped nuts over the melted chocolate. Let the bars cool at room temperature, then transfer to the refrigerator for 1-2 hours to set completely.

Step 7: Cut and Serve
Once fully set, lift the bars out of the pan using the parchment paper overhang. Cut into squares or rectangles and serve.