Set your oven to 350F
Cover a 9x5 pan with parchment paper
Mash your bananas until they’re pulpy
Pour cake mix into a good-sized bowl.
Add the bananas, oil, and eggs until mixed evenly
Fold in any additions at this point
Pour into the prepared pan
Bake for 45 minutes (checking at the 35 minute mark in case your oven runs hot.
The cake is done when a toothpick is mostly dry after placing it in the center of the bread (you might have a few small pieces clinging).
COOL before you cut it