Using a hand-held mixer, mix all ingredients together in a mixing bowl. How easy is that.
Pour into 18 greased muffin tins.
Bake at 350 degrees F for 15 minutes.
Notes
You could try substituting more ground oats for the oat fiber if you do not have the latter, but I have not tested the recipe with this substitution and cannot vouch for the results. The muffins are a little gooey inside, like most banana products are. I'm guessing that one could bake this recipe in one or two mini bread pans and have banana bread, but I haven't tried that yet. The tops of these muffins really sink. I've noticed this trend when baking with oat flour. It doesn't bother me any, but it does create a handy little well to stick stuff in. 2 or 3 of these muffins with Greek yogurt would make a great breakfast!
Recipe by Briana Thomas at https://www.briana-thomas.com/a-dozen-and-a-half-banana-muffins-e/