01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper.
02 - Whisk together flour, baking soda, salt, and cinnamon in a medium bowl until evenly blended.
03 - Whisk melted butter and sugar in a large bowl until combined. Beat in eggs one at a time, then stir in vanilla and mashed bananas.
04 - Add dry ingredients to wet mixture in two additions, mixing gently. Stir in milk until just incorporated—avoid overmixing.
05 - Fold chocolate chips into batter. Transfer to prepared loaf pan, optionally sprinkling extra chips on top.
06 - Bake for 50-60 minutes until toothpick inserted in center emerges with few moist crumbs.
07 - Cool in pan for 10 minutes. Remove to wire rack and cool completely before slicing.