Line a 9x13 inch baking sheet with parchment paper.
Chop your dark chocolate and place it into a microwave-safe bowl.
Chop your white chocolate and place it into a separate microwave-safe bowl.
First, melt your dark chocolate; melt the chocolate on HIGH setting in 30-second intervals. Stir the chocolate every 30 seconds. It took me four cycles to have it completely melted.
Remove the dark chocolate from the microwave and place in the white chocolate. Melt the white chocolate in 30-second intervals, stirring after each interval.
Spread the dark chocolate over the baking sheet with an offset spatula.
Once your white chocolate is melted, stir in peppermint extract.
Drizzle the white across the dark chocolate, creating lines. You can do this from the shorter or longer side.
Take a bamboo skewer and drag it through the surface of the white chocolate to make swirls.
Finally, add crushed candy or peppermint candies. Cool the peppermint bark in a fridge for 20 minutes.
Break into pieces before serving.
Notes
I used classic chocolate, but if you want to skip the chopping part, you can use chocolate chips. Always choose quality chocolate if you want good results.