01 - Line an 8x8 inch baking sheet with parchment paper and set aside.
02 - Create a double boiler by setting a heatproof bowl over a pan of gently simmering water. Add the white chocolate and stir continuously until completely smooth and melted.
03 - Transfer half of the melted white chocolate to a separate clean bowl, leaving equal portions in both bowls.
04 - Whisk the matcha powder into one bowl until fully incorporated and vibrantly green. Mix the peppermint extract into the second bowl until evenly distributed.
05 - Pour the peppermint-infused white chocolate onto the prepared baking sheet. Use a spatula to spread it evenly to approximately 1/4 inch thickness.
06 - Drizzle the matcha chocolate over the peppermint layer in parallel lines or scattered dollops. Drag a toothpick or skewer through both layers in a swirling motion to create a marbled pattern.
07 - Immediately sprinkle the crushed peppermint candies evenly over the surface while the chocolate remains tacky.
08 - Refrigerate for 30 minutes or until completely firm throughout.
09 - Break or cut into 16 pieces. Store in an airtight container at cool room temperature or refrigerate for longer keeping.