Melt the semi sweet chocolate bar and 1 teaspoon canola oil in a medium sized microwaveable glass bowl for 1 minute.  Stir.  Put in microwave again and cook for another minute, or until completely melted and smooth when stirred.  Stir in ¼ teaspoon peppermint extract.

Pour melted chocolate into a parchment paper lined 8x8 baking dish.  Smooth chocolate so that it covers the space evenly.  Place dish in the fridge for 1 hour.

Melt the white chocolate bar and one teaspoon canola oil in a medium sized microwaveable glass bowl for 1 minute. Stir. Put in microwave again and cook for another minute, or until completely melted and smooth when stirred. Stir in ¼ teaspoon peppermint extract.

Pour melted white chocolate on top of the hardened semi sweet chocolate layer.  Smooth chocolate so that it covers the space evenly. Sprinkle the crushed candy canes evenly over the white chocolate layer.  Place dish in the fridge for 1 hour.

Break bark into pieces and enjoy!!