Melt butter. Mash bananas. Add eggs, vanilla and melted butter to your bananas.
3
Mix dry and wet ingredients with a wooden spoon or spatula until combined.
Add chocolate chunks and pecans.
4
Divide into 12 muffin liners. Bake for 175-180 C for about 20 minutes, but check your muffins after 15 minutes. A toothpick should come out fairly clean, melted chocolate excepted.
Let cool.
5
Beat the room temp butter, cream cheese, powdered sugar, vanilla and cinnamon until light and fluffy, about 5-7 minutes. Pour into piping bag.
Wait until the muffins cool slightly before piping the frosting.
Buon apetito!