In a large pot, add the bananas cut into smaller pieces.
Add the milk and the cinnamon sticks.
Turn on the heat to medium-low, give everything a good stir and let it heat until it comes to a boil.
Once that happens, remove the cinnamon sticks.
Add the honey, the cocoa powder, the powdered milk and stir everything thoroughly until well combined.
Then, transfer everything to a blender and blend thoroughly until smooth and well combined.
Next, pour everything into a medium-sized baking dish, add the hazelnut cream and spread it evenly.
Place the mixture in the freezer and let it chill for at least 3 hours.
If you like, finish with chocolate syrup to taste.
Serve.