Preheat your oven to 350°F (180°C) and line a muffin tin with liners or coat it with non-stick cooking spray.
In a mixing bowl, whisk together the flour, baking powder, baking soda, and salt until combined.
In another mixing bowl, mash the ripe bananas with a fork or potato masher until they are smooth.
Add the granulated sugar, egg, vegetable oil, and vanilla extract to the mashed bananas and whisk until well combined.
Pour the wet ingredients into the dry ingredients and mix until just combined. Be careful not to overmix, as this can result in tough muffins.
Fold in the chocolate chips until evenly distributed throughout the batter.
Using a spoon or scoop, fill each muffin cup about 2/3 of the way full with the batter.
Bake the muffins in the preheated oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Once done, remove the muffins from the oven and allow them to cool in the muffin tin for 5 minutes before transferring them to a wire rack to cool completely.
Serve and enjoy your delicious Banana Chocolate Chip Muffins!