Melt semisweet chocolate pieces in the microwave according to the directions on the package.
Spread melted chocolate out on the parchment paper.
Place baking sheet in the freezer for 30 minutes.
Crush candy canes while the semisweet chocolate is freezing.
Melt white chocolate pieces in the microwave according to the directions on the package.
Spread melted white chocolate out on top of the dark chocolate.
Sprinkle crushed candy canes over the top of the white chocolate while the white chocolate is still soft. Press the candy cane pieces into the white chocolate using a spatula.
Place baking sheet in the freezer for 30 minutes.
Remove the bark from the freezer and break into pieces.
Store in an airtight container.
Notes
This makes a little over 1 1/2 pounds and could easily be divided between two gift tins.