Preheat oven to 375 degrees F (190 degrees C) and place the oven rack in the middle of the oven. Butter or spray a 12   cup muffin pan.

In a large bowl combine the flour, baking powder, baking soda, salt, and ground cinnamon

In another large bowl combine the mashed bananas, lightly beaten eggs, maple syrup, brown sugar, milk, oil, and vanilla extract. With a rubber spatula or wooden spoon, lightly fold the wet ingredients into the dry ingredients just until combined and the batter is thick and chunky. Fold in the chopped walnuts. (The important thing is not to over mix the batter. You do not want it smooth. Over mixing the batter will yield tough, rubbery muffins.) Spoon the batter into the prepared muffin tins and, if desired, place a slice of banana or dried banana chip on top of each muffin for garnish. Bake about 18 - 22 minutes or until a toothpick inserted in the center comes out clean. Place on a wire rack to cool for five minutes and then remove muffins from pan. Serve warm or at room temperature.

Makes 12 regular sized muffins.