Bake chocolate cookies according to desired instructions. Cool and set aside.
In a small saucepan, heat coconut cream to light simmer (do not boil).
Break up bittersweet chocolate into small pieces in a mixing bowl. Add sugar and vanilla to chocolate.
Pour hot coconut cream over chocolate. Stir until chocolate is melted and ingredients are blended together.
Place mixing bowl in refrigerator for 30 minutes to cool slightly.
Using a frosting bag or ziploc (with corner tip cut off), pipe ganache into center of one chocolate cookie. Top with additional cookie to form a sandwich.
Cut up Marshmallow into tiny triangles to resemble teeth. Place 3-4 “teeth” onto side of cookie sandwich.
Add two dollops of ganache to top of cookie sandwich. Press 2 Wilton candy eyes into ganache. Cool to set. Enjoy!