Preheat the oven to 350 degrees F and line a large baking sheet with parchment paper.

Peel the bananas and mash them in a bowl until creamy. Add in the egg and pure maple syrup and whisk well. 

Add in the almond flour, cinnamon and sea salt and stir well until the mixture is combined. It will be wet and sticky - this is normal!

Drop about 2 tablespoons of the cookie dough on the parchment-lined baking sheet and form it into a cookie shape. Repeat for the remaining batter.

Bake on the center rack of the preheated oven 20 to 28 minutes, until the cookies are golden-brown around the edges and set up.