Preheat oven to 350°F. Wipe or spray a loaf pan with oil and line with a strip of parchment paper.
In a large bowl, mix the flours, baking powder, baking soda, cinnamon, nutmeg, and sea salt. In a separate bowl, combine the pureed banana, milk, maple syrup, and vanilla extract. Add the wet mixture to the dry, then add the chocolate chips, and stir through until just well combined (don’t overmix).
Pour batter into pan and bake for 43–48 minutes, until golden and a toothpick or skewer inserted in the center comes out clean.
Gluten-Free Option: Replace all the flour with 2 full cups of certified gluten-free oat flour, or with 13/4 cups gluten-free flour blend (ex: Bob’s Red Mill) plus 1/2 cup and 2 tablespoons almond meal and 3/4 teaspoon xanthan gum.
Banana Note: Puree several medium-large overripe bananas in a blender or with an immersion blender and deep cup, then measure to get your 1 cup.
Kitchen Tip: To make muffins instead of a quick bread, pour mixture into a 12-cup muffin pan fitted with cupcake liners. Bake for 17–20 minutes, or until a toothpick inserted comes out clean. Remove, let cool for a few minutes in pan, and then transfer to a cooling rack to cool completely.