In a large bowl, mix the olive oil and coconut sugar with a fork or whisk. Add the eggs, vanilla, and mashed bananas and whisk again until well mixed.

In another bowl, combine the almond flour, tapioca flour, coconut flour, baking soda, salt, and cinnamon. Mix with a fork until blended.

Pour the bowl of dry ingredients into the bowl of wet ingredients and mix until just combined.  Set banana bread batter aside.

In a small bowl, make streusel. Mix almond flour, cinnamon, cocoa powder, coconut sugar and olive oil together until it clumps.

Pour 1/2 of the banana bread batter into the loaf pan. Sprinkle 1/2 of the streusel on top. Pour the rest of the banana bread batter on top and smooth it out with rubber spatula so smooth. Top with remaining streusel.

Bake for 45-55 minutes, until golden brown and a toothpick comes out mostly clean. With my current oven, it takes 45 minutes, but it does depend on your oven.

Let banana bread cool for 10-15 minutes before taking it out of the pan by lifting up the parchment paper.