Preheat the oven to 425 degrees. Line jumbo muffin pan with paper liners.
In a medium bowl, mash the bananas and then whisk in the sugar, milk, eggs, vegetable oil and vanilla until combined.
In a large bowl, whisk together the flour, baking powder, salt and cinnamon.
Pour the banana mixture into the flour mixture and fold until just combined. Then fold in the chocolate chips.
Transfer batter to the prepared muffin pans and sprinkle with turbinado sugar.
Bake for 5 minutes, then lower the temperature to 375 and bake for 25 minutes.
Remove from the oven and let cool in the pan for 5 minutes before transferring to a wire rack to finish cooling.
Notes
1 cup of all purpose flour can be replaced with the same amount of cake flour (lighter muffin) or wheat flour (denser muffin)Dairy or non-dairy milk, as well as buttermilk, can be used in this recipe.