Add the vanilla pudding, mashed bananas, and eggs to a bowl. Mix it well to combine.
Add in the yellow cake mix and mix until just blended. Mix in the chocolate chips or other add-ins if using.
Grease a 9x5 loaf pan and add the banana bread batter into the pan.
Bake it in the oven for 50 to 60 minutes until a toothpick comes out clean.
Let bread cool for at least 10 minutes then remove it from the loaf pan.
Notes
Always use overripe bananas for the best flavor.
For the smoothest texture, mash the ripe bananas really well before adding them in. I have even used a stand mixer to help mash them up extra well.
Do not overmix the batter once the cake mix is added or it can cause the middle to sink.
The loaf is done cooking when the top becomes caramelized and turns golden brown, and a toothpick inserted in the middle comes out clean.
Let the banana bread cool in the loaf pan on a wire rack for at least 10 minutes before removing it and slicing it for the cleanest slices without it crumbling.
Store leftover bread in an airtight container or wrapped in plastic wrap on the counter for up to 4 days.
This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.