Preheat oven to 350 degrees F (180 degrees C).
Melt the Butter (4 tablespoon) and Semi-Sweet Chocolate Chips (2/3 cup) in separate bowls.
Add the Banana (3) to a large bowl and mash them with a fork or potato masher. Add melted butter and combine. Add Egg (1), Brown Sugar (2/3 cup), and Vanilla Extract (2 teaspoon). Mix.
Add Baking Soda (1 teaspoon), Pumpkin Pie Spice (1 1/2 teaspoon), and Salt (1 pinch). Combine. Add All-Purpose Flour (1 1/2 cup) and mix until raw flour is no longer present. Don't over mix though!
Pour the bread batter into a greased loaf pan and dollop with the melted semi-sweet chocolate.
Swirl semi-sweet chocolate into bread and then bake 45-50 minutes until an inserted toothpick comes out clean.