Preheat and Prep: Set oven to 350F (175C). Grease 9×5-inch loaf pan, line with parchment overhanging sides. Mash Bananas: Peel spotty bananas, mash to smooth puree (360g). Some chunks ok for texture. Mix Wet Ingredients: Whisk mashed bananas, melted butter, brown sugar, eggs, vanilla until smooth and syrupy. Combine Dry: In separate bowl, stir flour, baking soda, baking powder, salt. Fold Together: Add dry to wet, fold gently until just combined (few flour streaks remain). Avoid overmixing for tenderness. Add Chips: Fold in 1 1/4 cups chips. Batter thick and lumpy. Bake: Pour into pan, smooth top, sprinkle remaining 1/4 cup chips. Bake 50-60 min until toothpick in center has moist crumbs (not wet batter). Top golden, cracked. Cool: Rest in pan 15 min, then wire rack fully. Slice once cool to prevent crumbling.