Begin by cutting the ripe bananas into uniform discs, approximately half an inch thick, to ensure they cook evenly.
Place a non-stick frying pan over medium heat and melt the butter until it begins to foam gently.
Stir in the brown sugar, cinnamon, and a touch of salt if using. Allow the mixture to bubble for about 30 seconds, forming a light, spiced caramel sauce.
Arrange the banana slices in the pan in a single, even layer. Cook each side for 1 to 2 minutes, turning once, until the surface of the fruit is golden brown and lightly caramelized.
Transfer from the skillet and serve immediately while warm. These make a delightful topping for oatmeal, pancakes, French toast, or ice cream—or can be enjoyed all on their own.