Classic Banana Bread with Brown Sugar and Nuts

Preheat the oven to 350ºF (177ºC). Spray a 9" x 5" loaf pan with non-stick spray. Set aside.
In a medium size bowl, whisk together the flour, baking soda, cinnamon, salt, and baking powder. Set aside.
In a large bowl with a handheld mixer, or the bowl of a stand mixer fitted with the paddle attachment, beat both of the sugars and the butter together on medium-high speed until light and fluffy, about 2-3 minutes. Add the eggs and beat again until completely incorporated. Add the banana and the water and beat again until everything is combined.
Reduce the mixer speed to low and slowly add the dry ingredients, stopping when everything is just incorporated. Gently stir in the nuts, if using, with a large spatula, and combine the rest of the batter with a spatula until no large flour pockets remain.
Pour the batter into the prepared pan, then bake the loaf for 50-60 minutes, or until a toothpick or cake tester inserted in the center comes out mostly clean. Allow loaf to cool in the pan on a wire cooling rack before serving. Loaf stays fresh, covered tightly at room temperature, up to 5 days, or in the refrigerator up to 1 week. Loaf freezes well. Remove from pan and wrap tightly in plastic wrap and foil, and freeze up to 2 months. Thaw in the refrigerator or at room temperature.