Preheat your oven to 350°F (175°C).
Line a muffin tin with paper liners or grease it lightly.
In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, salt, and ground cinnamon.
In a large bowl, combine the granulated sugar, brown sugar, mashed banana, Greek yogurt, egg, vanilla extract, and vegetable oil. Mix until well combined.
Gradually add the dry ingredients to the wet ingredients and stir gently until just combined.
Divide the batter evenly among the muffin cups, filling each about two-thirds full.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
Allow the muffins to cool in the pan for about 5 minutes before transferring them to a wire rack.