Gather all your ingredients and measure them out.
Mash the ripe bananas in a large mixing bowl until smooth. Add maple syrup, melted coconut oil, and vanilla extract. Mix until well combined.
In a separate bowl, whisk together gluten-free flour, baking powder, baking soda, salt, and cinnamon.
Gradually add the dry mixture to the banana mixture and stir gently until just combined.
Prepare muffin tin by lining it with paper liners or greasing it. Fill each cup about two-thirds full with batter.
Preheat oven to 350°F. Bake muffins for 18-20 minutes or until a toothpick comes out clean.
Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.