Preheat oven and line pan:
Set oven to 350°F (175°C). Place paper liners in a 12-cup muffin pan.Whisk dry ingredients:
In a medium bowl, combine flour, baking powder, and salt with a whisk. Set aside.Mix wet ingredients:
In a large bowl, whisk mashed bananas, vegetable oil, sugar, egg, and vanilla until smooth.Fold dry into wet with coconut:
Gently fold the dry mixture into the banana mixture until just combined. Then fold in 1 cup (80 g) of the shredded coconut and the optional nuts.Fill cups and top with coconut:
Evenly distribute the batter among the lined cups. Top with the remaining 1/2 cup (40 g) shredded coconut.Bake until toothpick clean:
Bake for 20-22 minutes, until a toothpick inserted into the center comes out clean.Cool and serve:
Move muffins to a wire rack to cool. Serve warm or at room temperature.