1/2cupsweetened shredded coconut, + extra for topping
Preheat oven to 350 degrees. Line a 12-cup muffin tin with paper liners.
In the bowl of an electric mixer fitted with the paddle attachment, combine flour, sugar, baking powder, baking soda, and salt. Add the melted butter and blend. Add the egg, milk, vanilla and mashed bananas to the flour-and-butter mixture and mix well. Fold the diced bananas, walnuts, granola and coconut into the batter.
Spoon the batter into the muffin cups, filling each ¾ full. Top with extra coconut, if desired. Bake 24-26 minutes, or until a toothpick inserted into the center of muffin comes out clean. Allow to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
*barely adapted from The Barefoot Contessa Cookbook by Ina Garten