01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly with cooking spray.
02 - In a large bowl, whisk together mashed bananas, eggs, vegetable oil, granulated sugar, brown sugar, and vanilla extract until smooth and well combined.
03 - In a separate medium bowl, sift together flour, baking soda, baking powder, and salt to ensure even distribution.
04 - Gradually fold the dry ingredients into the wet mixture using a spatula, mixing just until combined. Be careful not to overmix as this will result in dense muffins.
05 - Gently fold in the chocolate chips until evenly distributed throughout the batter.
06 - Divide batter evenly among the prepared muffin cups, filling each about 3/4 full. An ice cream scoop works well for consistent portioning.
07 - Bake for 16–18 minutes until golden brown and a toothpick inserted into the center comes out clean or with a few moist crumbs.
08 - Let muffins cool in the tin for 5 minutes, then transfer to a wire rack to cool completely before serving.