Preheat oven to 356F (180C) and prepare a loaf pan (1lb).
Add all dry ingredients (almond flour, all-purpose flour or gluten-free blend, baking soda, baking powder, and cinnamon) to a medium-sized bowl, whisk, and reserve.
Add the butter to a large bowl and melt it in the microwave in 30-second increments.
Add the brown sugar to the melted butter and whisk until thoroughly mixed.
Add the eggs, mashed bananas, and Greek yogurt to the wet mixture and whisk until well combined.
Slowly add the dry mixture to the wet and mix until there are no lumps of flour.
Fold in the dark chocolate chips.
Transfer the banana bread mixture to the prepared loaf pan and sprinkle more chocolate chips.
Bake for 60 min or until a toothpick comes out clean.