01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or grease each cup lightly with oil.
02 - In a large 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 ingredient mixture into the dry ingredients. Fold gently with a spatula 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 three-quarters full.
07 - Bake for 18 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean. The tops should be lightly golden.
08 - Let the muffins rest in the pan for 5 minutes, then transfer to a wire cooling rack to cool completely before serving.