01 - Line an 8x8 inch baking sheet with parchment paper and set aside.
02 - Set a heatproof bowl over a pan of gently simmering water to create a double boiler. Add the white chocolate and stir constantly until completely smooth and melted.
03 - Remove half of the melted white chocolate to a separate clean bowl, leaving equal portions in both bowls.
04 - Sprinkle the matcha powder into one bowl of melted chocolate. Stir vigorously until fully incorporated and the mixture turns a vibrant green color with no lumps.
05 - Pour the peppermint extract into the second bowl of chocolate. Mix thoroughly until evenly distributed.
06 - Pour the peppermint-infused white chocolate onto the prepared baking sheet. Use a spatula to spread it evenly until approximately 0.25 inch thick.
07 - Drizzle the matcha chocolate over the peppermint layer in parallel lines or scattered dollops. Drag a toothpick or skewer through both layers gently to create a marbled pattern.
08 - Immediately sprinkle the crushed peppermint candies evenly over the entire surface while the chocolate is still soft.
09 - Transfer the baking sheet to the refrigerator and chill for 30 minutes or until the bark is completely firm and set.
10 - Break or cut the bark into irregular pieces. Store in an airtight container at cool room temperature or refrigerate for longer shelf life.