Preheat oven to 350 degrees F. Line an 8x4 inch loaf pan with parchment paper or spray pan.
In a medium bowl, combine flour, cinnamon, baking soda, baking powder, and salt. Whisk until well combined.
In a large bowl, mash bananas well. Add the melted coconut oil, sugar, vanilla, apple cider vinegar, and 1/4 cup of almond milk. Whisk until well combined.
Add dry ingredients to wet. Use a spatula and stir until combined. Careful not to over mix.
Pour half of the batter into the other bowl. In one of the bowls, add the black sesame powder and 2 Tbsp of almond milk. Use a spatula and mix until combined.
Alternate scooping a dollop of the regular batter alternately with the black sesame batter into the loaf pan. Using a knife, swirl batter a few times. Sprinkle the black and white sesame seeds on top. Bake for 50-60 minutes, or until a toothpick inserted in the middle comes out clean. The top will be a golden brown.
Let it cool in the pan for 15 minutes then remove and place on a cooling rack to cool completely. Slice and enjoy! Store in an airtight container on the counter for 3 days.