Preheat oven to 350 degrees. Spray 2 bread pans with cooking spray.
Add butter and sugars to standing mixer and mix on high until light and fluffy, about 4-5 minutes. You may need to scrape down the sides of the bowl a few times to make sure it's well mixed.
In a separate bowl, mash the bananas well.
Add eggs to the butter/sugar mixture, and mix on medium-high until well combined. Then add in yogurt, mashed bananas, and vanilla and mix until well combined.
Add all dry ingredients (flour, baking soda, salt, cinnamon) to a separate bowl, and whisk together until evenly mixed.
Add the mixed dry ingredients to the standing mixer and stir on low until just barely combined--there shouldn't be any flour pockets.
Stir in any other mix-ins (ex. chocolate chips, pecans, walnuts, etc.)
Evenly distribute the bread batter between the two bread pans. Bake for 55-65 minutes. **After 25 minutes of baking, cover the bread pans loosely with tin foilu--this will keep the bread from burning before the middle has cooked through. Keep a close eye on the bread during the last 10 minutes of baking. Once the center is firm and a fork can come out clean, it is done.
After completely cooled, store in the refrigerator in a sealed container or plastic wrap, etc. This bread is even better the next day!