In a bowl, mash the bananas really well. Add the rest of the ingredients under wet and mix until the sugar is well combined.
In another bowl, whisk all the dry ingredients except the chocolate chunks, until well combined.
Mix the dry into the wet until well combined. Fold in the chocolate chunks.
Drop the batter into lined muffin pan.
Bake at 400 degrees F / 200ºc for 20 minutes, then reduce temperature to 375 and continue to bake for 5 to 7 minutes. Check at the 23 or 24 minute mark. Toothpick from the center should come out almost clean.
Let the muffins rest for 2 minutes then remove from the muffin pan and let them cool on a cooling rack lightly covered by a kitchen towel. Store on the counter for the day and refrigerate for upto 5 days
Notes
Variations, use pecans, walnuts or dried fruits.To make these with Spelt, wheat or other flour, mix in the baking soda, baking powder, salt and cinnamon into 1 cup of flour. Add to wet.Add more flour 1-2 tbsp at a time if needed to make a muffin life thick batter and bake.