Preheat oven to 425F. Prepare a 12 cup muffin tin by greasing or lining with muffin cups.

In a medium bowl mix together all the wet ingredients, adding the mashed banana at the end and mix just until combined.

In a large mixing bowl whisk together the dry ingredients. Make a well in the dry ingredients and add in the wet until combined. Fold in the chocolate chips. Your batter will be thick and lumpy.

Use an ice cream scoop to fill the prepared muffin tin. Fill each to the top.

Bake at 425 degrees for 5 minutes, then turn the heat down to 375 degrees and continue baking for an additional 25 minutes. T

Cool in the tins for 15 minutes and then remove and cool completely on a wire rack.