Preheat your oven to 350°F (180°C) and line a muffin tin with paper liners.
In a large bowl, mix together 1 1/2 cups (180g) of gluten-free flour, 1 tsp of baking powder, 1/2 tsp of baking soda, and 1/2 tsp of salt.
In a separate bowl, mash 2 ripe bananas until smooth.
Add 1/3 cup (80ml) of melted coconut oil, 1/3 cup (80ml) of honey, and 1 tsp of vanilla extract to the mashed bananas and mix well.
Pour the wet ingredients into the bowl of dry ingredients and mix until just combined.
Fold in 1/2 cup (50g) of chopped walnuts or pecans (optional).
Spoon the batter into the muffin tin, filling each liner about 3/4 of the way full.
Bake for 20-25 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Allow the muffins to cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.
Serve and enjoy your delicious gluten-free banana muffins!