Line a 9x5-inch loaf pan or 3 mini loaf pans with parchment paper and lightly grease the exposed ends of the pan
Sift together flour, sugar, baking powder, baking soda, and salt into large bowl.
In a separate bowl, combine mashed bananas, eggs, buttermilk, oil and vanilla. Fold dry ingredients into liquid ingredients until just combined and no large streak of flour remain. Batter will appear a little lumpy.
Fold in chocolate chips.
Pour Chocolate Chip Banana Bread batter into loaf pans. Set timer for 1 hour. Check banana bread at 1 hour for deeply golden brown color and a toothpick inserted into center comes out clean. Chocolate Chip Banana Bread may take up to 1 hour and 15 minutes.