Preheat oven to 425° F. and spray a 12-cup muffin pan with cooking spray or add muffin liners to it.
In a large bowl whisk together the dry ingredients. In a smaller bowl mash the bananas then whisk in the remaining wet ingredients. Pour the wet in with the dry and stir them together with a rubber spatula until you no longer see streaks of flour. Don’t over-mix.
Divide the muffin batter evenly into the muffin pan. Place on the middle rack of the oven and bake for 5 minutes at 425° F. then lower the heat to 375° F. and bake for another 10-13 minutes or until a toothpick inserted in the center of a muffin comes out clean or with a few crumbs attached.
Let the muffins cool in the pan for several minutes before removing them onto a wire cooling rack to finish cooling.
Notes
Once cooled, the muffins will keep for up to 3 days at room temperature in an airtight container. You can also freeze them for up to 3 months.