Scoop out the green ice cream onto individual plates, or on a baking sheet lined with wax paper
Freeze until good and firm
Meanwhile, coat your work surface with wax paper, and spray mist the sugar cones
if necessary - spray the cookie
Melt your chocolate melts
Squeeze a line of chocolate around the top of the sugar cone (about 1/4 inch down from the top)
If necessary, use a spreading knife to turn it into a wide line
Use some of the melted chocolate to secure the upside-down sugar cone to the cookie
Let the chocolate dry on the cone