Spoon some dipping chocolate into a sugar cone. Use a mini offset spatula to coat and cover the inside of the sugar cone with chocolate. Repeat with remaining sugar cones. Place upright in the freezer for about 2 minutes to set chocolate.
Fill sugar cones with coconut ice cream. Add a scoop on top. Place back in the freezer until ice cream is solid. Meanwhile, pour dipping chocolate into a wide mouth drinking glass. Prepare desired toppings.
Remove coconut sundae cones from the freezer. Working quickly, dip sundae cones into dipping chocolate. Immediately coat with desired toppings. Repeat with remaining cones. Place sundae cones in the freezer to set chocolate. Enjoy immediately, or store in the freezer until ready to eat.