Line a cookie sheet with parchment paper. Set aside.
Fill two saucepans about ⅓ of the way full with water. Pop them on the stove and bring to a boil, lower the temperature a bit so it's a low boil. Place a heat safe glass bowl over top of each saucepan. Be sure the bottom of the bowl does not touch the top of the water.
Place one kind of chocolate in each of the two bowls. Keep the water hot so the chocolate can melt. This double boiler method is my favourite way to melt chocolate.
Once each chocolate is smooth you can spoon them alternately onto the cookie sheet. Continue to spoon onto the cookie sheet until all the chocolate is gone. Now take a butter knife and drag it slowly though the colours to create the marble effect. I go in one direction, then the other until I get the effect I want.
Toss the peppermints over top. I love having some broken pieces, and some larger pieces. It just makes for fun bites.
Pop the bark in the fridge for an hour or two to allow it to set up. Snap the pieces by hand, or cut with a knife.
Serve with a big old chocolate and peppermint loving smile!
Video
Notes
You can also melt the chocolate in the microwave if you prefer.