Banana Bread packed with protein!

I recently revised a very popular banana bread recipe I found on allrecipes.com. I will post below the original recipe with my substitutions in parentheses.  My husband even agreed it was the best banana bread he ever had!
Ingredients:
3/4 c. butter (I used half homemade applesauce and half butter... Next time I would like to try all applesauce)
3 c. sugar (i got side tracked here and did not make any substitutions but next time I would like to cut it down to 2 c. one white and one brown sugar)
3 eggs
6 very ripe bananas mashed
1 container (16 oz) sour cream (i used almost all but about 1/2 c. of a 17.6 oz containter Fage Greek yogurt... The least amount of fat and most protein per serving of Greek yogurts)
2 tsp vanilla
2 tsp cinnamon (i added a dash more)
1/2 tsp salt (i used a dash less)
3 tsp baking soda
4 1/2 c. flour (i used 2 c. whole wheat and 2 1/2 c. all purpose)
Cream butter and sugar, add eggs until mixed through. Add bananas until mixed, then yogurt and vanilla. Stir in cinnamon, salt and baking soda. Slowly start adding flour until mixed through. Grease and flour 2 bread pans, fill 3/4 of the way and place in a 300 degree preheated oven.
I don't know difference this will make but I mixed this all by hand due to lack of mixer... I think next time I will use a hand mixer until adding flour... I don't want to much air when adding flour.


***Update - tried this again, 1/2'd the recipe for only 1 loaf and did the follow, turned out PERFECT!

3/4 c. applesauce
1/2 c. brown sugar
1/2 c. white sugar
1 egg
3 mashed bananas
3/4 - 1 c. yogurt
1 tsp vanilla
1 tsp cinnamon
1/2 tsp salt
1 1/2 tsp baking soda
1 c. whole wheat four
1 c. (plus a tiny extra) white flour

yummo!