Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
In a large bowl, use a fork (or two forks) to mash the bananas. Then, stir together the banana, peanut butter, brown sugar, honey, and vanilla.
In a small bowl, combine oats, flour, flaxseed, protein powder, baking soda, and cinnamon.
Add the oat mixture into the banana mixture and stir until mostly combined. Add the chocolate chips and stir just until combined (do not overmix).
Using a cookie scoop or tablespoon, drop heaping tablespoon-sized mounds of dough roughly 2 inches apart onto prepared baking sheets. Flatten and spread the cookie dough out a bit, if you want.
Bake for 12-14 minutes or until browned. To store, cool completely and place in an airtight container in the fridge for 3-5 days or follow freezing directions below.