Preheat oven to 350 F.

In blender add bananas, butter, sugar, eggs, vanilla, baking powder, baking soda, salt, cinnamon, flour, and milk. Blend on high until all is mixed, Pausing to scrape down the sides to make sure everything is mixed in.

If using a mixing bowl, Mash Bananas and mix with sugar, eggs and vanilla. In separate bowl combine Flour, baking soda, baking powder, salt and cinnamon, mix together. Add 1/2 of the dry mixture to the wet mixture, mix, then add half of the milk to the mixture, mix. Add the remaining dry mixture and then the remaining milk.

Pour batter mixture into muffin tin liners about 2/3rd's the way full. Bake for 15-20 minutes or until the mixture pops up.

It will make 26 muffins.