Preheat oven to 350.
Line a muffin tin with liners or spray generously with oil so they don’t stick.
In a large bowl, mash the banana and whisk in the eggs.
Then, add the maple syrup, milk, vanilla extract, melted coconut oil, and peanut butter.
Use a spoon to mix together well, or if you prefer, use a hand mixer (or pour it all in a blender and blend!).
The consistency should be pretty creamy, with some chunks left.
Next, add the oats, oat flour, baking powder, cinnamon, and chocolate chips, mixing together everything well.
Grab a spoon and fill each muffin cavity 3/4 of the way full.
Bake for 16 to 18 minutes.
Remove from oven and let cool before popping them out of the mold.
If you like extra chocolate (like in the photo here), just melt some chocolate chips and drizzle over the top. Enjoy!