Preheat your oven to 350 degrees. Spray a 9-by-13-inch baking dish with non-stick cooking spray.
Beat together cream banana, butter and sugar until it reaches a creamy consistency. Then beat in the vanilla, baking soda and salt. Beat in pumpkin puree until you have a light and fluffy dough.
It will resemble a mousse and don't be afraid to taste it; there's no raw eggs, so it is safe to eat!
Add in flour and beat at low speed until you have a soft, smooth dough. Stir in chocolate chips.
Your batter will be too thick to pour into your greased baking dish, so you will have to spread it until it's even. Bake at 350 degrees for 35-40 minutes.