Preheat Oven: Preheat your oven to 350°F (175°C) and lightly grease a baking pan.
Mix Dry Ingredients: In a large bowl, combine rolled oats, whole wheat flour, cocoa powder, baking powder, and salt.
Prepare Wet Mixture: In another bowl, whisk together mashed banana, eggs, honey (or maple syrup), vanilla extract, and milk.
Combine: Pour the wet ingredients into the dry mixture and stir until just combined. Fold in the dark chocolate chips.
Bake: Spread the batter evenly into the prepared pan. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean.
Cool and Serve: Allow the brownies to cool slightly before slicing. Enjoy warm or at room temperature.
