Preheat oven to 350F and prepare muffin tin with liners.

Pour rolled oats into a food processor or blender until oats break down.

In a large bowl, combine all dry ingredients and mix until combined.

In another bowl, mash banana until no chunks are present. Whisk in eggs and add remaining wet ingredients (peanut butter, milk, honey, and vanilla extract).

Pour wet ingredients into dry and mix. Once combined, add in chocolate chips.

Fill muffin cups about 1/2 the way full. If you have batter left over, evenly pour the remaining into muffin cups.

Bake at 350 for about 15-18 minutes or until toothpick runs clear.