01 -
Line a 23 x 33 cm tray with parchment paper. Prepare toppings by sorting and lightly crushing some of the M&Ms and readying candies and sprinkles.
02 -
Melt the white chocolate in a heatproof bowl over gently simmering water or in the microwave using 20-second intervals, stirring until smooth. Allow to cool slightly, then mix in drops of orange food coloring until the desired shade is achieved.
03 -
Melt the dark chocolate using the same gentle method, ensuring a smooth, glossy texture.
04 -
Pour the melted dark chocolate evenly into the prepared tray and spread into an even layer with a spatula. Drizzle orange-tinted white chocolate over the surface. Use a toothpick or skewer to gently swirl the chocolates to create a marbled effect without overmixing.
05 -
Immediately scatter M&Ms, assorted Halloween candies, and sprinkles over the surface. Lightly press larger sweets into the chocolate so they adhere without damaging the marbling. Optionally, add edible glitter or extra eyeballs for decoration. Let set at room temperature, or refrigerate for 20–30 minutes if needed, keeping watch so the candies retain their color vibrancy.
06 -
Once fully hardened, lift the chocolate slab from the tray and remove the parchment. Break into shards by hand for rustic edges. Serve as desired or package for gifting.