Preheat the Oven: Preheat your oven to 350°F (175°C). Grease or line a 9x5-inch loaf pan with parchment paper.
Mix Wet Ingredients: In a medium bowl, whisk together the mashed bananas, eggs, maple syrup, Greek yogurt, oil, and vanilla extract until smooth and well combined.
Mix Dry Ingredients: In a large bowl, whisk together the cake flour, whole wheat flour, baking soda, and salt.
Combine Wet and Dry Ingredients: Pour the wet ingredients into the bowl with the dry ingredients. Using a spatula, gently fold the mixture until just combined—do not overmix.
Add Chocolate Chips: Gently fold in the dark chocolate chips until evenly distributed throughout the batter.
Bake: Pour the batter into the prepared loaf pan and spread it evenly. Bake for 40–45 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Cool and Serve: Allow the banana bread to cool in the pan for about 10 minutes, then transfer to a wire rack to cool completely. Slice and enjoy!