Preheat oven to 350°.
Peel bananas and mash to make one cup.
In a bowl, beat the mashed bananas, eggs, sugar, butter
and vanilla until well blended.
In a larger bowl, combine flour, baking powder, cinnamon and salt.
Stir in chocolate chips and nuts.
Make a well in the center of the dry ingredients.
Pour in the banana mixture. Mix until just blended.
Spoon into greased and floured muffin pans.
Bake for 25-30 min.