Place all the ingredients in a blender - first the bananas, then the milk, vanilla, and cinnamon, and finally the ice cream.
Blend until smooth and creamy or to your desired consistency. Taste test and adjust any of the ingredients if needed.
Pour into glasses, optionally top with whipped cream, dried banana chips, or your favorite toppings, and enjoy!
Video
Notes
To store: The milkshake is best as soon as it's ready. If needed, leftovers can be stored in the fridge for several hours.Check the blog post for more tips!