Preheat oven to 325°F/165°C. Grease a bread loaf pan and set aside.
In a medium bowl, whisk together the oil and maple syrup. Add the eggs and whisk. Then add mashed bananas, milk, and vanilla. Whisk until well combined.
In a large bowl, mix together the gluten-free flour, baking soda, salt, and cinnamon. Add the wet ingredients into the dry mixture and stir until mixed. Gently fold in the chopped walnuts.
Pour batter into the greased loaf pan. Bake 55-60 minutes (muffins 25 mins) or until done. Allow the bread to cool before slicing and serving.
