Heat the skillet over medium heat and add the butter, allowing it to melt.

Add the sliced bananas to the skillet and cook for about 2-3 minutes until they start to caramelize.

Sprinkle the cinnamon and brown sugar (if using) over the bananas and gently toss to coat.

Continue to cook for another 2-3 minutes until the bananas are golden brown and soft.

Remove from heat and serve warm.