Preheat your oven to 350°F. Line a 1.5-quart glass or aluminum loaf pan with parchment paper and spray lightly with non-stick cooking spray. Set aside the loaf pan while you make the batter.
In a large mixing bowl, combine almond flour, cassava flour, coconut sugar, baking powder, and ground cinnamon. Use a whisk to stir together. Then, add the chopped dates and walnuts and use a spatula to stir together. Set the bowl aside
Place the eggs, vanilla extract, banana, and almond milk in a small high-speed blender and process on high until combined, about 15 seconds.
Pour the mixture from the blender into the bowl with the dry ingredients. Add the melted coconut oil and stir to combine.
Pour the batter into the baking dish and place in the oven for one hour, or until the bread turns golden brown. Remove the bread carefully from the dish and place onto a cooling rack.
Serve warm or at room temperature. Refrigerate any leftovers and serve within 5 days.