Preheat your oven to 350°F (175°C).
Line a 9x9 inch baking pan with parchment paper or lightly grease it.
Mash the ripe bananas in a mixing bowl until smooth.
Add the creamy almond butter to the mashed bananas and stir until well combined.
Stir in the rolled oats, chocolate chips, vanilla extract, sea salt, ground cinnamon, and chopped nuts (if using).
Pour the mixture into your prepared baking pan and smooth the top with a spatula.
Bake for about 25-30 minutes, or until the edges are golden and a toothpick inserted in the center comes out clean.
Let it cool for 10-15 minutes before cutting into squares.
