Add all of the ingredients to a blender
and blend until completely smooth.
Use 2 dates or 2 tablespoons maple syrup if you have a very sweet tooth. Otherwise one will be enough. If your bananas are really spotty and ripe you might get away with no sweetener at all.
Start with ¾ cup of milk, blend and see how the texture is for you. If you want it thinner add the rest of the milk and blend again for a couple of seconds.