Preheat the oven to 350℉/176℃ and grease and line a 9x5 loaf pan with parchment paper. Set aside. Mash the bananas and set aside.
1 cup bananas
In a bowl, mix together the flour, baking soda, cinnamon, nutmeg, cloves, cornstarch, and salt. Set aside.
2 cups all-purpose flour, 1 tsp baking soda, 1 tsp cinnamon, 1/8 tsp nutmeg, 1/8 tsp cloves, 1 tbsp cornstarch, 1/2 tsp salt
In another large bowl, add the white sugar, peanut butter, bananas, eggs, vanilla, oil, and sour cream. Whisk well to combine. It may be clumpy from the bananas, that's normal!
3/4 cups white sugar, 1/3 cup oil, 2 large eggs, 1 tbsp vanilla, 1/2 cup sour cream, 3/4 cups creamy peanut butter, 1 cup bananas
Combine the dry and wet ingredients together until almost completely combined, then mix in the mini chocolate chips and continue to mix just until the flour streaks disappear. Do not over-mix!
2/3 cups mini chocolate chips
Scoop half of the batter into the prepared pan and spread. Then drizzle some peanut butter on top and swirl in. Add the rest of the batter on top, and drizzle and swirl the rest of the peanut butter. Finish by sprinkling some mini chocolate chips.
3 tbsp creamy peanut butter
Bake the bread for 60-80 minutes or until a toothpick inserted in the middle comes out clean. Mine took 75 minutes. I would start checking every 5 minutes after the 55 minute mark as every oven differs.
Once baked, slightly open the oven and allow the hot air to come out. Leave it like this for 10 minutes to prevent the loaf from collapsing, then remove it completely from the oven and allow it to cool on the counter.
Once ready, slice, and enjoy!