Preheat your oven to 350°F. Line a 9x5 inch loaf pan with parchment paper.
PB Filling:
In a medium bowl, using an electric hand mixer, beat your filling ingredients until smooth. Cover the bowl and refrigerate while you make the batter.
Loaf:
In a large bowl, mash your bananas. NExt add in your oil, sugar, eggs and vanilla and mix until combined.
Next add in your flour, cacao powder, baking soda and salt and mix until combined. Lastly fold in your chocolate chips.
Pour 75% of the chocolate batter into your pan. Then add in the peanut butter layer spreading out gently. Laslty top with your remaining chocolate batter. Bake for about 1 hour and 10 minutes or until toothpick comes out clean. I loosely covered mine with aluminum foil to prevent the top from burning about the 50 minute mark. Allow to rest in the pan for 15 minutes then transfer to a cooling rack to set for 30 minutes.
Notes
*You can use melted butter for the avocado oil, or sunflower oil (or any neutral flavored oil)You can use white cane sugar instead of the brown sugar.