01 - Line an 8x8 inch baking sheet with parchment paper and set aside.
02 - Place white chocolate in a heatproof bowl set over a pan of gently simmering water, stirring frequently until completely smooth and melted.
03 - Transfer half of the melted chocolate to a separate clean bowl, leaving equal portions in both bowls.
04 - Whisk matcha powder into one bowl of melted chocolate until fully incorporated and vibrantly green with no lumps remaining.
05 - Stir peppermint extract into the remaining bowl of chocolate, mixing thoroughly to distribute evenly.
06 - Pour the peppermint-infused chocolate onto the prepared baking sheet and spread with an offset spatula to create an even layer approximately 1/4 inch thick.
07 - Drizzle the matcha chocolate over the peppermint layer in diagonal lines, then gently swirl with a toothpick or skewer to create a marbled pattern without over-mixing.
08 - Immediately sprinkle crushed peppermint candies evenly over the surface while chocolate is still soft to ensure proper adhesion.
09 - Refrigerate for 30 minutes or until completely firm and set throughout.
10 - Break into irregular pieces or cut into squares, then store in an airtight container at cool room temperature or refrigerate for longer shelf life.