This moist, better-for-you banana cake uses whole wheat flour, Greek yogurt, and just a touch of maple syrup for natural sweetness—perfectly tender with warm cinnamon and an optional walnut crunch.
Preheat oven to 350°F. Grease a 9×13-inch baking pan and line with parchment, leaving an overhang for easy lifting.
In a large bowl, whisk flour, baking soda, baking powder, cinnamon, and salt until well combined.
In a separate bowl, whisk mashed bananas, Greek yogurt, maple syrup, coconut oil, eggs, and vanilla until smooth.
Add the dry ingredients to the wet mixture and fold gently with a spatula just until no dry streaks remain. Do not overmix.
Stir in walnuts if using. Spread batter evenly into the prepared pan and tap the pan lightly on the counter to release air bubbles.
Bake for 30 to 35 minutes, or until the top is set and a toothpick inserted in the center comes out clean or with a few moist crumbs.
Cool in the pan on a rack for 15 minutes, then lift out using the parchment and let cool completely.
Slice into 12 squares. Serve plain or with a dollop of Greek yogurt and a sprinkle of cinnamon.
Notes
For dairy-free, use a thick dairy-free yogurt. For nut-free, omit walnuts. Store covered at room temperature for up to 2 days or refrigerate for up to 5 days. Cake freezes well for up to 2 months; thaw overnight in the refrigerator.