Preheat your oven to 350 degrees.
Butter or oil your loaf pans or line them with parchment paper.
Grind your flour and set aside.
Mix together flour, baking powder, baking soda, cinnamon, and salt.
In a separate bowl, mash your bananas well.
Add eggs, maple syrup, coconut sugar, vanilla to banana mixture and mix well.
Next, in the same bowl, add your melted butter, combine, and then lastly your milk.
Add wet ingredients to dry and mix well. Don't overmix.
If you are using walnuts, add them to the mixture.
Pour your batter into both greased loaf pans.
Bake at 350 degrees for 40-60 minutes depending on your loaf pan sizes. Keep an eye on it around the 40 minute mark. You can tell if it's done by putting a toothpick in the center. When it comes out clean, it's done.
Cool in the pan for at least 15 minutes before trying to remove it.