Step 1: Prepare the Baking Sheet: Line a baking sheet with parchment paper. This is crucial for preventing the chocolate from sticking and makes it easy to remove the bark once it has set. Ensure the parchment paper covers the entire surface of the baking sheet to prevent any chocolate from dripping onto the sheet itself. Alternatively, you can use a silicone baking mat, which is reusable and also prevents sticking.
Step 2: Melt the Dark Chocolate: In a microwave-safe bowl, melt the dark chocolate in 30-second intervals, stirring well after each interval, until it is smooth and completely melted. This method prevents the chocolate from burning. If you prefer, you can melt the chocolate in a double boiler over simmering water, ensuring the bowl doesn't touch the water. The key is to melt the chocolate slowly and evenly to avoid any lumps or scorching.
Step 3: Spread the Dark Chocolate: Pour the melted dark chocolate onto the prepared baking sheet and spread it into an even layer using a spatula. Aim for a layer that is about ¼ inch thick. This provides a good balance between the dark and white chocolate layers. Make sure the chocolate is evenly distributed to create a uniform base for the bark.
Step 4: Melt the White Chocolate: In another microwave-safe bowl, melt the white chocolate in the same manner as the dark chocolate: 30-second intervals, stirring well after each interval, until smooth. Be extra careful with white chocolate, as it tends to scorch more easily than dark chocolate. Keep a close eye on it and stir frequently. Once melted, stir in the peppermint extract and green food coloring until you achieve your desired shade of green. Adjust the amount of food coloring to get the perfect festive green hue.
Step 5: Swirl and Top: Pour the green white chocolate over the dark chocolate layer. Use a toothpick or skewer to gently swirl the two chocolates together, creating a marbled effect. Be careful not to over-mix, as this can muddy the colors. The goal is to create beautiful swirls and patterns while keeping the colors distinct. Sprinkle the crushed peppermint candies or candy canes evenly over the top of the chocolate. Gently press them into the chocolate to ensure they adhere well.
Step 6: Chill and Break: Refrigerate the baking sheet until the chocolate is completely set, about 1-2 hours. Once set, remove the bark from the refrigerator and break it into irregular pieces. Use a sharp knife to score the chocolate before breaking it for more even pieces. Store the bark in an airtight container in the refrigerator to prevent it from melting.