01 - Line a large baking sheet with parchment paper to prevent sticking and ensure easy removal.
02 - In a heatproof bowl set over simmering water or using a microwave in 30-second intervals, melt the semisweet or bittersweet chocolate, stirring until smooth.
03 - Pour the melted chocolate onto the prepared baking sheet and evenly spread it using an offset spatula or spoon to achieve a 1/4-inch thickness.
04 - Before the chocolate sets, evenly distribute the mini pretzels, candy corn, peanut butter cups, candy-coated chocolates, and gummy worms over the chocolate surface.
05 - Melt the white chocolate in a separate bowl, then drizzle it decoratively over the bark as desired.
06 - Scatter Halloween-themed sprinkles across the top for festive color and texture.
07 - Place the baking sheet in the refrigerator for at least 30 minutes, or until the bark is completely firm.
08 - Once set, break the bark into uneven pieces and transfer into an airtight container.
09 - Store at cool room temperature for up to one week.