Line a medium baking sheet with parchment paper.
Crush candy canes into small pieces for the topping. Finely crush mini candy canes for mixing into the chocolate.*
Melt milk chocolate in the microwave. Stir about half of the finely crushed mini candy canes into the chocolate, then pour onto the baking sheet and spread into an even layer.
Melt white chocolate in the microwave. Stir the remaining finely crushed mini candy canes into the chocolate, then pour on top of the milk chocolate.
Swirl the two chocolates together using a knife, then top with crushed candy cane pieces.
Let sit at room temperature for about 4 hours, or until chocolate is completely solidified.*
Break bark into pieces and store in an air-tight container for up to 2 weeks.*