Preheat your oven to 350°F (175°C) and grease mini loaf pans or line them with parchment paper.
In a bowl, mash the overripe bananas until smooth.
Mix in the light brown sugar, vegetable oil, and vanilla extract until well combined.
In a separate bowl, whisk together the flour, baking soda, ground cinnamon, and salt.
Combine the wet and dry ingredients, stirring gently until just mixed. Avoid overmixing.
Pour the batter evenly into the mini loaf pans.
Bake for 25 minutes, or until a toothpick inserted into the center comes out clean.
Cool the loaves in the pans for a few minutes before transferring them to a wire rack to cool completely.