Preheat oven to 375°F and line your baking trays with muffin liners.
Melt butter. I do this in microwave to save time.
In a bowl combine flour, baking soda, baking powder, salt and cinnamon.
In a bowl or mixer mash the ripe bananas and add sugar, egg, butter, and vanilla and combine.
Slowly mix in flour mixture into the banana mixture until just moist.
Add the chopped up chocolate orange and mix in.
Spoon into muffin liners and bake for 25 minutes or until golden on top. I always double check the muffins are cooked by using a toothpick.
Allow to cool on wire rack for a few minutes before serving!
Notes
You can also make this as a loaf instead of muffins by pouring mixture into greased loaf pan.Variations - instead of chocolate orange add - chocolate chips or peanut chips. Nuts are also a lovely addition.