Preheat oven to 350°F (175°C) and prepare a muffin tin with liners.

In a bowl, mash the bananas until smooth.

Whisk in the sugar, eggs, vegetable oil, and vanilla until well combined.

In another bowl, mix flour, baking powder, and salt. Gradually add to the banana mixture and stir until just combined.

Scoop batter into muffin tins, filling each about two-thirds full.

Bake for 18-20 minutes or until golden brown and a toothpick comes out clean.

Cool in the tin for five minutes before transferring to a wire rack.