Okay, non-SBDer here. I tried my best to stay as close to the recipe as I could. The difference was using 1/2 cup of peanut butter (it was all I had on hand and I already had started the eggs and banana before I realized my mistake), added an extra mashed banana, omitted the cinnamon and mixed in 1/2 cup old fashioned oats (half was mixed in and the other half was sprinkled/swirled on top.) I also baked it in a loaf pan instead of muffins.
I cannot believe it looks just like a "regular" banana bread without all that flour! Very excited to try it after it cools down and I will not say a word to the BF either. He's gonna freak, lol.
ETA- holy batman! They taste and look just like banana bread although with a hint of peanut butter! I'm glad I didn't have the whole cup on hand, I think that'd be way too peanutty for me. Thinking about trying this with pecan butter.