Line a baking sheet with parchment paper.
In microwave save bowl, add semisweet chocolate and microwave in intervals of 30 seconds.
Stir very well between each interval and when it starts looking pretty melted, shorten the intervals to 15 seconds.
Once melted, pour onto prepared baking sheet, spreading out with a spatula.
Immediately place pretzels close to one another on top of the chocolate.
Repeat melting process with white chocolate.
Drizzle white chocolate all over the pretzels.
Top with crushed candy canes.
Place into refrigerator and let set for 15-20 minutes.
Once set, cut into squares and enjoy!