Preheat oven to 350 degrees F.
Mash bananas in with fork until lumpy.
Combine bananas with oats and chocolate chips in a large bowl.
Add cinnamon and vanilla if using.
Place tablespoon-fulls onto a cookie sheet, lined with parchment paper.
If you're looking for the sweet and salty taste, put 2-3 grains of rock salt on the top of each cookie. A little goes a long way with rock salt! Can use Kosher salt too.
Bake in the oven for 10-12 minutes at 350F until cookies are still soft but browned on the bottom.