01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup.
02 - In a large mixing bowl, whisk together the all-purpose flour, matcha powder, baking soda, baking powder, and salt until evenly distributed.
03 - In a separate bowl, combine the mashed bananas, granulated sugar, eggs, melted coconut oil, coconut milk, and vanilla extract. Stir until the mixture is smooth and well incorporated.
04 - Pour the wet mixture into the dry ingredients and fold gently until just combined. Avoid overmixing to keep the muffins tender.
05 - Gently fold in the shredded coconut and chopped nuts, if using, distributing them evenly throughout the batter.
06 - Divide the batter evenly among the prepared muffin cups, filling each about two-thirds full.
07 - Bake for 18 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
08 - Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.