Preheat oven to 350F.
Line an 8” x 8” cake pan or loaf pan with baking paper, or lightly oil and dust with flour, shaking out excess.
Put the milk, oil, maple syrup, vanilla, and bananas in a blender and blend until smooth.
In a large bowl combine dry ingredients. Add banana mixture and combine using as few strokes as possible. Fold in nuts and chocolate.
Pour into a cake pan and smooth the top. Sprinkle with flaky salt (if using). Bake until a toothpick inserted in the centre comes out clean and is very dark, dark brown. The time varies greatly according to oven, ingredients, and location – mine takes about any where between 45 mins and 2 hours. Check at 45 mins and then regularly after that. Remove from the oven and let cool completely before slicing. Enjoy!