01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly with cooking spray.
02 - In a large mixing 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. Mix just until combined—do not overmix as this will result in dense muffins.
05 - Gently fold in the chocolate chips until evenly distributed throughout the batter.
06 - Divide the batter evenly among the prepared muffin cups, filling each about 3/4 full.
07 - Bake for 16-18 minutes until a toothpick inserted into the center comes out clean or with just a few moist crumbs attached.
08 - Allow muffins to cool in the tin for 5 minutes before transferring to a wire rack to cool completely.