Make your witch hats. Unwrap a Hershey kiss and add a drop of black decorating gel to the bottom. Stick it to the Grasshopper cookie and set to the side to fully set.
Make your witch brooms. Using kitchen scissors, cut the marshmallow ends ¾ of the way up to make the fringe of the broom. Poke a mini marshmallow to the end of a pretzel stick.
Pour the candy melts into their own bowls and melt according to package instructions.
Spread a sheet of wax paper or parchment paper over the counter.
Once melted, drop small dots of the candy melts over the paper.
Using a skewer, drag it through all of the colors until your desired pattern appears.
Sprinkle with sugar crystals if desired.
Gently press the witch hats and brooms into the bark.
Allow to set for 30 minutes.
Break into pieces and enjoy.