Preheat oven to 350 degrees. Line a baking sheet with parchment paper.
In a large bowl, the bananas and combine with honey, vanilla, and peanut butter until combined.
Add oats, cinnamon, baking powder, and salt to the bowl and stir to combine.
Fold in flax, chia seeds, and chocolate chips.
Scoop approximately 1/4 cup of cookie mix and shape into cookies on the parchment paper. These do not spread, so how you place them on the baking sheet is how they will look. I placed 8 cookies on a large baking sheet. Pat down the top of the cookies so they lay more flat for baking.
Top with flaky sea salt if you like. Bake for 15 minutes at 350 degrees or until the cookies are set and a little golden brown on top.