Preheat oven to 180°C (350°F). Line or grease a 20 cm (8-inch) loaf pan.
In a large bowl, mash bananas until smooth.
Stir in egg, egg white, maple syrup, vanilla, cinnamon, and salt.
Add oat flour and baking powder. Gradually mix in the milk until batter is thick but moist.
Pour into the pan. Bake 30–40 minutes or until a toothpick inserted comes out clean.
Let cool in pan 15 minutes, then cool completely before slicing.
See full steps with tips & photos → https://theboatshedcafe.com/low-calorie-banana-bread/