Preheat the oven to 350°F. Line a 12-count muffin tin with paper liners or nonstick spray.
Add the bananas to a large bowl and mash them with a fork.
Once the bananas are completely mashed, add the almond butter, applesauce, and vanilla extract and whisk to combine.
In a medium bowl, add the dry ingredients: almond flour, baking soda, salt, cinnamon, nutmeg, dark chocolate chips. Stir to combine.
Add the dry ingredients to the wet ingredients and stir just until combined and there are no more dry streaks.
Fill the muffin tins 3/4 full, and sprinkle with the optional mini chocolate chips on top, if desired.
Bake the muffins for 18-22 minutes, or until a toothpick comes out clean or with a few moist crumbs on it.
Once the muffins are done baking, let them cool for about 10 minutes before removing from the pan and enjoying.