It hardens on ice cream, why not a chilled banana? I gave it a go, and here is how I did it.
Step 1: Ingredients
Ripe bananas (as straight as you can find)
Magic Chocolate Shell (store bought or homemade)
Aluminum foil/ wax paper/ parchment paper
A bowl (preferably one with corners or a pour spout)
Step 2: Prep
Then you'll want to insert your skewer about two thirds of the way into your banana (my straight one broke in half inside the peel, so I had to get a replacement, not very straight). I use another skewer to judge approximately where the tip is.
Then place your banana on your tray and covering of choice.
Step 3: Time to Chill
Put your bananas in the freezer for about thirty minutes or until it's nearly frozen. You don't want it frozen solid, just cold enough that it will harden the chocolate later on.
When it's almost time to take them out, pour your chocolate shell into your bowl, and have a spoon ready. Don't forget to shake/mix your chocolate, because whether it's homemade or store bought, it contains oil, and things that contain oil separate over time if it's left untouched.
Step 4: Coating
Once the first coat hardens, feel free to add a second.
Then if you're doing more than one, place banana onto your papered or foiled surface and grab the next.
After that, more waiting. Put the bananas back into the freezer for about another ten minutes.