Preheat oven to 350°F and grease a 24-cup mini muffin tin or line with mini muffin liners.
Mash the bananas in a large bowl until completely smooth.
Add the eggs, almond butter, maple syrup, and cinnamon to the bowl and stir until a smooth batter forms.
Scoop the batter into the prepared muffin tin, filling each cup about ¾ of the way full.
Bake for 12–15 minutes, or until set on top and a toothpick inserted in the center comes out clean.
Cool in the tin for 5 minutes, then transfer to a wire rack. Enjoy!