Preheat the oven to 350 degrees. Spray a loaf pan with cooking spray and set aside.

In a small skillet heat the butter over medium heat, stirring occasionally until the butter begins to brown. Remove from heat and allow to cool for 5 minutes.

In a large bowl combine the butter and brown sugar. Add in the eggs one at a time, stirring well after each addition.

In a small bowl combine the flour, baking powder, and oats. Add the flour mixture to the butter mixture and mix until well combined.

Stir in the bananas, mixing well. Fold in the butterscotch chips.

Spread the batter into the prepared pan. Bake for 40-50 minutes or until a toothpick inserted into the center comes out clean.

Cool completely before serving.