Preheat oven to 350F
In a large mixing bowl, mash the bananas using a fork or whisk. A few chunks are fine!
Melt the coconut oil and add to the bowl. Whisk together with banana
Add applesauce, vanilla and milk to the bowl, and whisk everything together
Add eggs, and whisk until combined
Add cinnamon and baking soda, and whisk into the mixture
Pulse the spinach in a blender until finely chopped (it will be slightly clumpy and wet), and add the pulsed spinach to the bowl. Whisk to combine.
If you'd like, throw in some fruit for color and extra flavor! I have used blueberries, strawberries or apricots, to name a few.
Lastly, add the wheat and oat flour, and stir until combined
Spoon mixture into lightly greased muffin tins (I use a small amount of coconut oil to grease the tins)
Bake for 20 minutes and check for done with a toothpick. If toothpick comes out clean, remove from over and cool before removing from tins. If toothpick has residue, bake for an additional 1-2 minutes.