Preheat oven to 350°F. Grease 9x5x3-inch loaf pan or line with parchment on bottom and sides
In mixing bowl, whisk or sift together flour, baking powder, baking soda, cinnamon, nutmeg and salt.
In another mixing bowl, whisk together eggs, bananas, sugar, and melted butter. Stir dry ingredients into beaten wet ingredients just until just moistened. Batter can be lumpy. Fold in optional nuts.
Pour batter into prepared pan and level the top. Bake 40 minutes or until toothpick inserted in center comes out clean. Cool in pan on wire rack for 10 minutes. Remove loaf from pan and cool completely before slicing.
The perfect bananas for banana bread will have a mostly blackened skin and a texture too mushy to be desirable for eating. Less ripe bananas will not be as sweet and might also yield more volume when mashed or pureed. Use the 1 ½ cup guideline to determine the amount of mashed or pureed bananas.