Preheat an oven to 190°C. Line a muffin pan with a muffin liner.
In a medium bowl, combine the sugar, oil, eggs, mashed bananas and vanilla, whisk until combined.
Add in flour, baking powder, salt, and cinnamon and mix together until combined.
Divide the batter evenly among a lined muffin tin, filling halfway.
Bake 20 minutes or until a toothpick inserted in the muffin comes out clean. Immediately transfer to a cooling rack. Enjoy warm or completely cooled.