Preheat oven to 170 deg C.
In a bowl, mash ripe banana with a fork and keep it aside for later use.
Sieve together flour, almond flour, baking soda, baking powder, cinnamon powder and salt. Keep it aside.
In stand mixer add sugar and egg and beat in medium speed till the sugar is dissolved.
Add almond butter and mashed banana and beat again, mixture will still be lumpy due to mashed banana.
Gradually add flour mixture in two batches and stir until just combined. Don’t over stir it.
Grease the loaf pan or muffin tray and divide the mixture in prepared muffin tray or loaf pan.
Drizzle melted chocolate and give a swirl, and also sprinkle almond flakes on top.
Place the tray in preheated. oven. Bake for 17-18 minutes, until a toothpick inserted comes out clean and the tops turn golden.
Cool in the pan for 10 minutes then transfer it to a cooling rack to cool completely.