Preheat oven to 375F and prepare a muffin tin by lining it with liners in every other cavity.
Then, in a medium bowl add in the mashed ripe bananas, almond butter, melted coconut oil, coconut sugar, vanilla extract and cinnamon. Mix well.
Next, sift in the all purpose flour, baking soda and salt.
Fold ingredients until they are almost combined and then add in the walnuts last.
Add the batter to the prepared muffin tins.
Sprinkle with course sugar and top with walnuts.
Bake for 23-25 minutes or until a toothpick inserted in the center comes out clean.
Let cool for 15 minutes and enjoy!